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1
Patouma, Lewa, Elias Nchiwan Nukenine, Ibrahima Adamou et Champlain Djieto-Lordon. « Caractérisation de l’entomofaune de la tomate (Lycopersicon esculentum Mill) en champ dans la localité de Meskine, région de l’Extrême-nord, Cameroun ». International Journal of Biological and Chemical Sciences 14, no 6 (6 octobre 2020) : 2069–76. http://dx.doi.org/10.4314/ijbcs.v14i6.11.
Texte intégralRésumé :
La localité de Meskine à Maroua, longtemps considérée comme une zone céréalière de l’Extrême-nord du Cameroun, est devenue, de nos jours, une région de production de tomate par excellence. Les producteurs de cette culture font face à plusieurs contraintes parmi lesquelles les activités des insectes ravageurs. Dans le but de contribuer à l’amélioration de la production de cette culture, la présente étude a permis d’établir une liste des insectes ravageurs et utiles pullulant dans les champs de tomate. Les insectes, collectés par aspiration et par fauchage, ont été identifiés dans les laboratoires de Zoologie appliquée des universités de Ngaoundéré et Yaoundé I au Cameroun. L’inventaire a montré que les insectes inféodés à la culture de la tomate dans la localité de Meskine à Maroua sont représentés par huit (8) ordres, vingt-une (21) familles et vingt-deux (22) genres. Ces insectes. Bien que la majorité de ces insectes soit des ravageurs, on note la présence de quelques prédateurs et pollinisateurs. La détermination de l’entomofaune de la culture de tomate dans cette localité est un outil qui peut ainsi servir à la conception de stratégies de lutte contre les ravageurs.
Mots clés: Lycopersicon esculentum, insectes ravageurs, insectes prédateurs, Maroua.
English Title: Entomofauna associated to the tomato crops (Lycopersicon esculentum Mill) in the locality of Meskine, Far North region, Cameroon
Meskine in the Far North region, Cameroon has long been considered as cereal zone production. This locality has become today a region of tomato production per excellence. Farmers in this locality are faced to many constrains among which activities of insect pests. In order to improve the production of this crop, the present study allows us to establish a list of potential insect pests and benefit insects of tomato crops. Insects collected using aspirator and sweep net were identified in the laboratories of applied Zoology at the Universities of Ngaoundéré and Yaoundé I, Cameroon. The results of our study showed that, insects associated to tomatoes in the locality of Meskine were from eight (8) orders, twenty-one (21) families and twenty-two (22) genera. Although the majority of these insects were represented by potential insect pests, some predators and pollinators were recorded. The establishment of the lists of harmful and benefits insects associated to the tomato crop in this locality can therefore be used to design strategies for the management of insect pests.Keywords: Lycopersicon esculentum, insect pests, predator insects, Maroua
2
Styer, E. L., et J. J. Hamm. « Detection and Identification of Viruses in Economically Important Insects ». Microscopy and Microanalysis 6, S2 (août 2000) : 666–67. http://dx.doi.org/10.1017/s1431927600035820.
Texte intégralRésumé :
Economically important insects include pests of plants, animals and stored products as well as insects produced commercially (honey bees, silkworms, insects for fish bait and food for birds and zoo animals). Other insects are produced in large numbers for experimental purposes, biological control of insect pests and weeds and the production of sterile insects for population suppression. Insect viruses may affect morphology, physiology and behavior, often reducing longevity and reproductive potential. Thus insect viruses can be used as biological control agents of pest insects. Insect viruses may also interfere with the production or function of biological control agents (e.g., parasitoids and predators) and insects used for research purposes. Therefore, it is advantageous to screen commercial and research colonies and imported insects for viruses.Electron microscopy of negatively stained specimens (NS EM) offers a relatively rapid and inexpensive means of screening populations of insects for the presence of viruses or viruslike particles and to monitor the progress of virus control programs.
3
Pinotti, L., et M. Ottoboni. « Substrate as insect feed for bio-mass production ». Journal of Insects as Food and Feed 7, no 5 (13 août 2021) : 585–96. http://dx.doi.org/10.3920/jiff2020.0110.
Texte intégralRésumé :
Insects are able to convert organic material (i.e. waste and by products) into high-quality biomass, which can be processed into animal feed. Several studies have investigated the influence of growing substrates on the nutritional value of different insect species, particularly black soldier fly larvae and prepupae. This article reviews studies on how insects bioconvert different substrates, the effect of the substrate on the composition of insect meals, and on the development time (time needed to reach the harvesting state). All these studies indicate that insects convert low and high quality organic material (i.e. waste, by products, compound feeds) into high-quality insect biomass. The role and effects of selected nutrients, such as ether extract/fats, carbohydrates and fibre in the substrate, seem to be key factors in defining the features of the biomass as well as the time needed to reach the harvesting state.
4
DiGiacomo, K., H. Akit et B. J. Leury. « Insects : a novel animal-feed protein source for the Australian market ». Animal Production Science 59, no 11 (2019) : 2037. http://dx.doi.org/10.1071/an19301.
Texte intégralRésumé :
The increasing demands on natural resources to provide food and feed has led to increased global initiatives to improve production sustainability and efficiency. The use of insects as an alternate source of protein for human food and production-animal feed is one such avenue gaining attention. With there being a large variety of insect species endemic to each region, there is likely to be an ideal candidate for each specific production system and region. Insects require less land and water than do terrestrial animals, have high feed-conversion efficiency (FCE) and emit low levels of greenhouse gases (GHG). Insect species currently investigated for mass production include black soldier fly larvae (BSFL), mealworms and crickets. In western societies, it is less likely that wide-scale adoption of insects as a food source will occur, although speciality products with ‘hidden’ insects, such as cricket flour, are commercially available. It is likely to be more achievable for insects to be included into the diets of production and companion animals. While there has been significant investment in research and development of large-scale insect-production systems, such facilities are yet to start producing at a significant scale. The safety and efficacy of insects as a food or feed must be established in conjunction with the development of mass rearing facilities and the optimisation of insect-rearing substrates. Insects also have nutraceutical properties that may have beneficial impacts on animal health and growth, with scope for these properties to be exploited as feed or food additives. The present review will explore the following question: ‘are insects a future livestock industry for Australia?’.
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Moon, Tasfia Tasnim, Ishrat Jahan Maliha, Abdullah Al Moin Khan, Moutoshi Chakraborty, Md Sharaf Uddin, Md Ruhul Amin et Tofazzal Islam. « CRISPR-Cas Genome Editing for Insect Pest Stress Management in Crop Plants ». Stresses 2, no 4 (7 décembre 2022) : 493–514. http://dx.doi.org/10.3390/stresses2040034.
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Global crop yield and food security are being threatened by phytophagous insects. Innovative methods are required to increase agricultural output while reducing reliance on hazardous synthetic insecticides. Using the revolutionary CRISPR-Cas technology to develop insect-resistant plants appears to be highly efficient at lowering production costs and increasing farm profitability. The genomes of both a model insect, Drosophila melanogaster, and major phytophagous insect genera, viz. Spodoptera, Helicoverpa, Nilaparvata, Locusta, Tribolium, Agrotis, etc., were successfully edited by the CRISPR-Cas toolkits. This new method, however, has the ability to alter an insect’s DNA in order to either induce a gene drive or overcome an insect’s tolerance to certain insecticides. The rapid progress in the methodologies of CRISPR technology and their diverse applications show a high promise in the development of insect-resistant plant varieties or other strategies for the sustainable management of insect pests to ensure food security. This paper reviewed and critically discussed the use of CRISPR-Cas genome-editing technology in long-term insect pest management. The emphasis of this review was on the prospective uses of the CRISPR-Cas system for insect stress management in crop production through the creation of genome-edited crop plants or insects. The potential and the difficulties of using CRISPR-Cas technology to reduce pest stress in crop plants were critically examined and discussed.
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Indriati, G., Susilawati, M. Puspitasari, F. Soesanthy et C. Tresniawati. « Insect diversity on toxic candlenut (Reutealis trisperma) plantation in Bajawa, East Nusa Tenggara ». IOP Conference Series : Earth and Environmental Science 974, no 1 (1 janvier 2022) : 012131. http://dx.doi.org/10.1088/1755-1315/974/1/012131.
Texte intégralRésumé :
Abstract Toxic candlenut (Reutealis trisperma) is an important plantation commodity that serves as barrier to prevent erosion, as main material for bio-pesticides and as renewable source of biofuel production. It has been studied that toxic candlenut development in post-mining field can restore soil structure while also influencing environment surrounding, including insects. The study examined insect diversity in the R. trisperma plantation aged ±7 years in Bajawa field, East Nusa Tenggara from July 2018 until February 2019. Insect were collected by installed malaise traps, yellow traps, and pitfall traps in 5 different plots A, B, C, D, and E for 24 hours. Collected insects were then identified in the laboratory using identification book. The results showed there were 13 orders of insects were collected by traps. The diversity index (H’) of insect in the area were 4.053; 3.305; 3.521; 2.973 and 2.611 while the Evenness index (E) of insect were 0.872; 0.836; 0.780; 0.665 and 0.614 respectively. Insect diversity in the Bajawa plantation was high and the dominan individual was Hymenopteran and Dipteran. Several insects were in R. trisperma plant, as herbivores, predators, parasitoids, and pollinators. Further research is needed to determine each family of insect’s role in the R. trisperma plantation.
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Nguyen, Hoang Chinh, Ngoc Tuan Nguyen, Chia-Hung Su, Fu-Ming Wang, Tuyet Nhung Tran, Ying-Tzu Liao et Shih-Hsiang Liang. « Biodiesel Production from Insects : From Organic Waste to Renewable Energy ». Current Organic Chemistry 23, no 14 (16 octobre 2019) : 1499–508. http://dx.doi.org/10.2174/1385272823666190422125120.
Texte intégralRésumé :
The conversion of organic wastes into biodiesel has become an attractive solution to address waste surplus problems and energy depletion. Oleaginous insects can degrade various organic wastes to accumulate fat-based biomass, thus serving as a potential feedstock for biodiesel production. Therefore, the use of insects fed on organic waste for biodiesel production has increasingly attracted considerable investigations. In recent years, different insect species have been studied for their efficiency in converting various organic wastes and for producing biodiesel from their fat. Several methods have been developed for biodiesel production from insects to improve yields and reduce production costs and environmental impacts. This review summarizes the latest findings of the use of insects for converting organic wastes into biodiesel. The production processes and fuel properties of biodiesel produced from insects are also discussed.
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Rumpold, B. A., et A. van Huis. « Education as a key to promoting insects as food ». Journal of Insects as Food and Feed 7, no 6 (11 septembre 2021) : 949–53. http://dx.doi.org/10.3920/jiff2021.x007.
Texte intégralRésumé :
Children in tropical countries have always eaten insects but are now often discouraged from doing so. Recently, the idea of the consumption of insects has been re-introduced as an answer to malnutrition since edible insects are a potential alternative and sustainable protein and food source. However, in countries where the consumption of insects is not traditional, there is a lack of acceptance as well as skills when it comes to preparing a meal with insects. Examples of experiments from different parts of the world are given, where children in schools are educated about the nutritional and environmental benefits of eating insects. In general, after the experience, children are more positive about the idea of eating insects. It is stipulated that insects as food could be a very good entry point for the discussion about our future food supply. Furthermore, with the increasing commercial production of edible insects, there is an increasing demand for skilled workers in the insect production industry. Essential to the promotion of insect consumption are the development of curricula and educational materials for vocational education, training of insect farmers, and general education in primary and secondary schools as well as tertiary education.
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Eilenberg, J., J. M. Vlak, C. Nielsen-LeRoux, S. Cappellozza et A. B. Jensen. « Diseases in insects produced for food and feed ». Journal of Insects as Food and Feed 1, no 2 (1 janvier 2015) : 87–102. http://dx.doi.org/10.3920/jiff2014.0022.
Texte intégralRésumé :
Increased production of insects on a large scale for food and feed will likely lead to many novel challenges, including problems with diseases. We provide an overview of important groups of insect pathogens, which can cause disease in insects produced for food and feed. Main characteristics of each pathogen group (viruses, bacteria, fungi, protists and nematodes) are described and illustrated, with a selection of examples from the most commonly produced insect species for food and feed. Honeybee and silkworm are mostly produced for other reasons than as human food, yet we can still use them as examples to learn about emergence of new diseases in production insects. Results from a 2014 survey about insect diseases in current insect production systems are presented for the first time. Finally, we give some recommendations for the prevention and control of insect diseases.
10
Berggren, Å., A. Jansson et M. Low. « Using current systems to inform rearing facility design in the insect-as-food industry ». Journal of Insects as Food and Feed 4, no 3 (30 août 2018) : 167–70. http://dx.doi.org/10.3920/jiff2017.0076.
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As wild harvesting of insects gives way to mass rearing, there is an urgent need to develop expertise and methods in insect animal husbandry and facility design. In order to advance the science of animal husbandry and production in this field, comparisons and contrasts of different insect rearing facilities currently in production are likely to be beneficial. Here we initiate this discussion by suggesting a focus on insect rearing facilities at the two ends of the production scale spectrum (small-scale rearing and mass rearing) that have different end products (insects-as-food and insects for other purposes). We suggest that organisations with a philosophy of information sharing (e.g. universities) need to play an active role in this developing production system, by bridging gaps between academia, industry and traditional knowledge to ensure a rapid and societally acceptable development of wide-scale entomophagy.
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Kinyuru, J. N., et N. W. Ndung’u. « Promoting edible insects in Kenya : historical, present and future perspectives towards establishment of a sustainable value chain ». Journal of Insects as Food and Feed 6, no 1 (6 février 2020) : 51–58. http://dx.doi.org/10.3920/jiff2019.0016.
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This paper discusses the current state and priorities of Kenya-based research and innovations on insects as food and feed with a view to establishing a vibrant insects’ value chain. The paper is divided into sections that focus on historical insect consumption, farming, utilisation and entrepreneurial priorities. The paper also introduces a new quadrat model for utilisation of edible insects which shows an interrelationship between edible insects, crops, animals and humans. The paper attempts to identify attempts on identifying social and psychological barriers to insects’ acceptance as food and feed since insects are intimately connected to strong cultural and regional values. We conclude with recommendations about the future priorities of edible insect field which include: tracking of production volumes, new innovations to support automation and industrial production, research on consumer attitudes and behaviour that is culturally sensitive, systematic, and large-scale; enactment of national and regional regulations to support the industry and unequivocal acknowledgment of the impacts of developments in the edible insect industry to national and regional development.
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Kowalska, Dorota. « Insects as a source of nutrients in animal feed ». Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego 15, no 3 (2 octobre 2019) : 25–37. http://dx.doi.org/10.5604/01.3001.0013.5131.
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Global production of compound feed in 2018 was 1.103 billion tonnes, which was an increase of 3% compared to 2017. To meet the needs of the growing livestock population, a further increase in compound feed production is necessary. The need for new, alternative nutrient sources for feed production, in order to meet the anticipated consumer demand for animal products, has led to an increase in research on the potential uses and effects of insect-derived products, such as whole insects or insect meals and oils. Insects appear to be one of the most promising alternatives to nutrient sources such as soybean and fish meal, commonly used in feed for livestock and aquaculture. The purpose of the review was to present the currently available literature on the use of insects as feed in livestock production and to systematize it in one easy-to-read document. Particular focus has been placed on the use of insect products for animals such as poultry, rabbits and pigs, as well as their effect on productivity, nutrient digestibility, performance, and product quality. The results of numerous studies suggest that insects can be a source of nutrients in feed for poultry, rabbits and pigs.
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Varelas. « Food Wastes as a Potential new Source for Edible Insect Mass Production for Food and Feed : A review ». Fermentation 5, no 3 (2 septembre 2019) : 81. http://dx.doi.org/10.3390/fermentation5030081.
Texte intégralRésumé :
About one-third of the food produced annually worldwide ends up as waste. A minor part of this waste is used for biofuel and compost production, but most is landfilled, causing environmental damage. Mass production of edible insects for human food and livestock feed seems a sustainable solution to meet demand for animal-based protein, which is expected to increase due to rapid global population growth. The aim of this review was to compile up-to-date information on mass rearing of edible insects for food and feed based on food wastes. The use and the potential role of the fermentation process in edible insect mass production and the potential impact of this rearing process in achieving an environmentally friendly and sustainable food industry was also assessed. Food waste comprises a huge nutrient stock that could be valorized to feed nutritionally flexible edible insects. Artificial diets based on food by-products for black soldier fly, house fly, mealworm, and house cricket mass production have already been tested with promising results. The use of fermentation and fermentation by-products can contribute to this process and future research is proposed towards this direction. Part of the sustainability of the food sector could be based on the valorization of food waste for edible insect mass production. Further research on functional properties of reared edible insects, standardization of edible insects rearing techniques, safety control aspects, and life cycle assessments is needed for an insect-based food industry.
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Manzano-Agugliaro, F., M. J. Sanchez-Muros, F. G. Barroso, A. Martínez-Sánchez, S. Rojo et C. Pérez-Bañón. « Insects for biodiesel production ». Renewable and Sustainable Energy Reviews 16, no 6 (août 2012) : 3744–53. http://dx.doi.org/10.1016/j.rser.2012.03.017.
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Hafsah, H., I. Iriawati et T. S. Syamsudin. « Flower-visiting insects to Coffea arabica flower at different temperatures and the production of the fruit of arabica coffee ». IOP Conference Series : Earth and Environmental Science 948, no 1 (1 décembre 2021) : 012046. http://dx.doi.org/10.1088/1755-1315/948/1/012046.
Texte intégralRésumé :
Abstract Temperature change may affect insect activity, including flower-visiting insects. Flower-visiting insects, particularly pollinators, have an impact on the fruits produced. This research aimed to study the relationships of flower-visiting insects at different temperatures and coffee production. The gauze experiment was carried out on the coffee plantation that consists of two sites, shaded and unshaded. The study involved 30 arabica inflorescences. The number of flower-visiting insects was recorded and captured. The results showed that the diversity of flower-visiting insects was related to the temperature differences. The flower-visiting insect on the unshaded site was more diverse than the shaded site. The formation of peaberries and the productivity of coffee fruit were also different. Peaberry production was lower (6.24 %) while the fruit mass was heavier (0.15±0.096 g/cherry) in unshaded than shaded sites. However, at the unshaded, the percentage of coffee beans defect was 0.56 % greater than the shaded one. According to these findings, more flower-visiting insects lead to the lower peaberry formation, the heavier fruit mass but potentially causing higher defective coffee beans. The increase in temperature due to climate change can be detrimental because these phenomena will increase the number of coffee fruit defects and insect pests.
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Thrastardottir, Runa, Hildur Thora Olafsdottir et Ragnheidur Inga Thorarinsdottir. « Yellow Mealworm and Black Soldier Fly Larvae for Feed and Food Production in Europe, with Emphasis on Iceland ». Foods 10, no 11 (9 novembre 2021) : 2744. http://dx.doi.org/10.3390/foods10112744.
Texte intégralRésumé :
Insects are part of the diet of over 2 billion people worldwide; however, insects have not been popular in Europe, neither as food nor as a feed ingredient. This has been changing in recent years, due to increased knowledge regarding the nutritional benefits, the need for novel protein production and the low environmental impact of insects compared to conventional protein production. The purpose of this study is to give an overview of the most popular insects farmed in Europe, yellow mealworm, Tenebrio molitor, and black soldier fly (BSF), Hermetia illucens, together with the main obstacles and risks. A comprehensive literature study was carried out and 27 insect farming companies found listed in Europe were contacted directly. The results show that the insect farming industry is increasing in Europe, and the success of the frontrunners is based on large investments in technology, automation and economy of scale. The interest of venture capital firms is noticeable, covering 90% of the investment costs in some cases. It is concluded that insect farming in Europe is likely to expand rapidly in the coming years, offering new proteins and other valuable products, not only as a feed ingredient, but also for human consumption. European regulations have additionally been rapidly changing, with more freedom towards insects as food and feed. There is an increased knowledge regarding safety concerns of edible insects, and the results indicate that edible insects pose a smaller risk for zoonotic diseases than livestock. However, knowledge regarding risk posed by edible insects is still lacking, but food and feed safety is essential to put products on the European market.
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Bear, Christopher. « Approaching Insect Death : Understandings and Practices of the UK’s Edible Insect Farmers ». Society & ; Animals 27, no 7 (11 décembre 2019) : 751–68. http://dx.doi.org/10.1163/15685306-00001871.
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AbstractWhile insects are eaten by around two billion people globally, they are a relatively new addition to the UK’s culinary landscape. A domestic production sector has begun to emerge to supply this new appetite for insects. Social scientists have been quick to explore consumer attitudes to “edible insects” but insect farmers have thus far been largely ignored. This paper addresses this gap by drawing on interviews with the UK’s current and recent edible insect farmers to explore their understandings of, and approaches to, insect death, something about which all participants expressed concern. The paper examines: 1) reasons for farmers’ concerns around how they kill their insects, ranging from anxieties around insect pain to perceived consumer attitudes; and 2) farmers’ ideas about what constitutes a “good” death for insects, and how they incorporate this in their practices.
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Nasrin, M., MR Amin, MRU Miah, AM Akanda et MG Miah. « Impact of Foraging Insect Pollinators on Chili Production ». Bangladesh Journal of Agricultural Research 46, no 3 (26 janvier 2023) : 297–306. http://dx.doi.org/10.3329/bjar.v46i3.64130.
Texte intégralRésumé :
The abundance, foraging behavior, and diurnal and seasonal dynamics of the pollinator insects in chili ecosystem, and the impact of the pollinator insects on chili production was studied at the Bangabandhu Sheikh Mujibur Rahman Agricultural University, (BSMRAU) Gazipur, Bangladesh using the chili variety BARI Morich 2. The crop was cultivated in natural, supplemented insect and selfpollination conditions. The lime butterfly, honey bee, carpenter bee and sweat bee were found in the chili ecosystem. Honey bee depicted significantly the highest abundance and visitation frequency and carpenter bee was found as the most rapid forager. The diurnal and seasonal abundance of the pollinator insects was fluctuated and the peak abundance was found at 11.00 hour of the day. Abundance of lime butterfly, honey bee and carpenter bee revealed negative relationship with maximum and minimum temperatures, and positive relationship with relative humidity and rainfall. Abundance of sweat bee was positively correlated with maximum and minimum temperatures and rainfall, and negatively correlated with relative humidity. The chili plants exerted vulnerable response to insect pollination producing significantly the higher number of fruits per plant, fruit length, diameter and weight, number of seed per fruit, seed weight and yield.
Bangladesh J. Agril. Res. 46(3): 297-306, September 2021
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Misra, A. K., Rahul Patel et Navnit Jha. « Modeling the effects of insecticides and external efforts on crop production ». Nonlinear Analysis : Modelling and Control 26, no 6 (1 novembre 2021) : 1012–30. http://dx.doi.org/10.15388/namc.2021.26.24442.
Texte intégralRésumé :
In this paper a nonlinear mathematical model is proposed and analyzed to understand the effects of insects, insecticides and external efforts on the agricultural crop productions. In the modeling process, we have assumed that crops grow logistically and decrease due to insects, which are wholly dependent on crops. Insecticides and external efforts are applied to control the insect population and enhance the crop production, respectively. The external efforts affect the intrinsic growth rate and carrying capacity of crop production. The feasibility of equilibria and their stability properties are discussed. We have identified the key parameters for the formulation of effective control strategies necessary to combat the insect population and increase the crop production using the approach of global sensitivity analysis. Numerical simulation is performed, which supports the analytical findings. It is shown that periodic oscillations arise through Hopf bifurcation as spraying rate of insecticides decreases. Our findings suggest that to gain the desired crop production, the rate of spraying and the quality of insecticides with proper use of external efforts are much important.
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Kornher, Lukas, Martin Schellhorn et Saskia Vetter. « Disgusting or Innovative-Consumer Willingness to Pay for Insect Based Burger Patties in Germany ». Sustainability 11, no 7 (28 mars 2019) : 1878. http://dx.doi.org/10.3390/su11071878.
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Insects represent an excellent source of food due to their density in unsaturated fatty acids, vitamins, and minerals, while their production is associated with lower emissions of greenhouse gases and resource use as compared to other conventional protein sources. In most Western countries, the human consumption of insects is very low and often perceived as culturally inappropriate. In this study, we analyzed the preferences of German consumers for insect-based products to intensify the knowledge about specific consumer segments that are willing to adopt insects into their diet. For this purpose, an online based choice experiment was conducted in 2016, in which respondents chose between an ordinary burger and a burger with a beef burger patty fortified with insect flour. We detect three homogeneous consumer segments in our sample. The largest group of respondents is willing to consume insect-fortified burgers with only a small price discount, while the other respondents had a prohibitively low willingness-to-pay. The readiness of consumers to adopt insects into their diet is strongly related to attitudinal variables, such as preferences for an environmental friendly production method and health aspects. On the other hand, disgust and the aversion towards insects seem to be the main reasons to abstain from eating insects.
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Gasco, L., E. J. Lock et H. Ji. « Introducing the special issue ‘Application of insect ingredients in sustainable aquaculture’ ». Journal of Insects as Food and Feed 8, no 11 (28 octobre 2022) : 1169–72. http://dx.doi.org/10.3920/jiff2022.x007.
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The use of insects in aquafeed is a topic of great interest. IPIFF forecasts indicate that by 2030 40% of insect meal production will be used in aquaculture (IPIFF, 2021). The Journal of Insects as Food and Feed published a call for papers for an open-access special issue to share a deeper understanding of beneficial aspects of the use of insects. Published papers touched on aspects of insect nutrient digestibility, analytical methodologies, fish performances and health, consumer acceptance and socio-economic aspects.
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Gałęcki, Remigiusz, Tadeusz Bakuła et Janusz Gołaszewski. « Foodborne Diseases in the Edible Insect Industry in Europe—New Challenges and Old Problems ». Foods 12, no 4 (10 février 2023) : 770. http://dx.doi.org/10.3390/foods12040770.
Texte intégralRésumé :
Insects play a key role in European agroecosystems. Insects provide important ecosystem services and make a significant contribution to the food chain, sustainable agriculture, the farm-to-fork (F2F) strategy, and the European Green Deal. Edible insects are regarded as a sustainable alternative to livestock, but their microbiological safety for consumers has not yet been fully clarified. The aim of this article is to describe the role of edible insects in the F2F approach, to discuss the latest veterinary guidelines concerning consumption of insect-based foods, and to analyze the biological, chemical, and physical hazards associated with edible insect farming and processing. Five groups of biological risk factors, ten groups of chemical risk factors, and thirteen groups of physical risks factors have been identified and divided into sub-groups. The presented risk maps can facilitate identification of potential threats, such as foodborne pathogens in various insect species and insect-based foods. Ensuring safety of insect-based foods, including effective control of foodborne diseases, will be a significant milestone on the path to maintaining a sustainable food chain in line with the F2F strategy and EU policies. Edible insects constitute a new category of farmed animals and a novel link in the food chain, but their production poses the same problems and challenges that are encountered in conventional livestock rearing and meat production.
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Hameed, Amna, Waqar Majeed, Muhammad Naveed, Uzma Ramzan, Matteo Bordiga, Maryam Hameed, Saud Ur Rehman et Naureen Rana. « Success of Aquaculture Industry with New Insights of Using Insects as Feed : A Review ». Fishes 7, no 6 (17 décembre 2022) : 395. http://dx.doi.org/10.3390/fishes7060395.
Texte intégralRésumé :
Most of world’s fish and seafood are produced by aquaculture, which is one of the biggest contributors to the world’s food security. The substantial increase in prices of conventional feed ingredients and the over-exploitation of natural resources are some of the biggest constraints to aquaculture production. To overcome this stress, different approaches and techniques are used, among which the use of non-conventional feed ingredients in the aquaculture sector is the most recent approach. Different non-conventional feed ingredients such as plant-based products, algae (both micro and macroalgae), single-cell protein (bacteria and yeast), and insect meal are currently used in aquaculture for sustainable food production. Amongst all these novel ingredients, insects have greater potential to replace fishmeal. The existence of about 1.3 billion tons of food and agriculture waste from the food chain supply poses a serious environmental threat. Insects are tiny creatures that can thrive on organic waste and thus can convert the waste to wealth by the bioconversion and nutritional upcycling of organic waste. Insects have the potential to recover nutrients from waste aquaculture products, and many fish species feed on insects naturally. Therefore, employing insects in the aquaculture sector to replace fishmeal is an eco-friendly approach. The present review briefly highlights emerging non-conventional feed ingredients, with special attention given to insects. The current review also focuses on the nutritional value of insects, factors affecting the nutritional value of insects, potential insects that can be employed in the aquaculture sector, the physiological response of fish when fed with insect meal, techno-functional properties of insect meal, and emerging approaches for addressing possible downsides of employing insect meal in fish diets. Finally, it suggests avenues for further research into these inventive fishmeal replacements.
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Mahmoud, Farag. « Insects associated with sesame (Sesamun indicum L.) and the impact of insect pollinators on crop production ». Pesticidi i fitomedicina 27, no 2 (2012) : 117–29. http://dx.doi.org/10.2298/pif1202117m.
Texte intégralRésumé :
A survey of insects associated with sesame, Sesamun indicum L. (Pedaliaceae) was conducted at the Agriculture Research Farm of The Faculty of Agriculture, University of Suez Canal during the growing seasons 2010 and 2011. All different insect species found on the experimental site were collected for identification. Sampling was done once a week and three times a day. Three methods were used to collect insects from the sesame plants (a sweep net, pitfall traps, digital camera and eye observation). A total of 31 insect species were collected and properly identified during the survey. Insects recorded on the plants were divided into four groups, true pollinators (Hymenoptera), other pollinators (Diptera, Coleoptera and Lepidoptera), pests (Orthoptera, Odonata, Hemiptera and Homoptera) and natural enemies (Coleoptera, Hymenoptera, Neuroptera and Dictyoptera). For studying the impact of insect pollination on sesame production, the experiment was divided in two: opened and non-opened pollination of sesame. 50 plants from nonopened pollination were covered with a perforated paper bag to allow the air to pass through and to prevent insects from approaching the plants. Quantitative and qualitative parameters were measured as follows: pod weight, number of seeds in each pod, weight of 1000 seeds, germination (%), seedlings vigour and oil content (%). Results clearly demonstrate that the opened pollination improved the crop production.
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Veldkamp, Teun, et Adriaan Vernooij. « “Insects for Africa” : opportunities for insect production in East Africa ». INFORM International News on Fats, Oils, and Related Materials 31, no 1 (1 janvier 2020) : 24–26. http://dx.doi.org/10.21748/inform.01.2020.24.
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Herbert Tran, Erin E., et Heidi Goodrich-Blair. « CpxRA Contributes to Xenorhabdus nematophila Virulence through Regulation of lrhA and Modulation of Insect Immunity ». Applied and Environmental Microbiology 75, no 12 (17 avril 2009) : 3998–4006. http://dx.doi.org/10.1128/aem.02657-08.
Texte intégralRésumé :
ABSTRACT The gammaproteobacterium Xenorhabdus nematophila is a blood pathogen of insects that requires the CpxRA signal transduction system for full virulence (E. E. Herbert et al., Appl. Environ. Microbiol. 73:7826-7836, 2007). We show here that the ΔcpxR1 mutant has altered localization, growth, and immune suppressive activities relative to its wild-type parent during infection of Manduca sexta insects. In contrast to wild-type X. nematophila, which were recovered throughout infection, ΔcpxR1 cells did not accumulate in hemolymph until after insect death. In vivo imaging of fluorescently labeled bacteria within live insects showed that ΔcpxR1 displayed delayed accumulation and also occasionally were present in isolated nodes rather than systemically throughout the insect as was wild-type X. nematophila. In addition, in contrast to its wild-type parent, the ΔcpxR1 mutant elicited transcription of an insect antimicrobial peptide, cecropin. Relative to phosphate-buffered saline-injected insects, cecropin transcript was induced 21-fold more in insects injected with ΔcpxR1 and 2-fold more in insects injected with wild-type X. nematophila. These data suggest that the ΔcpxR1 mutant has a defect in immune suppression or has an increased propensity to activate M. sexta immunity. CpxR regulates, directly or indirectly, genes known or predicted to be involved in virulence (E. E. Herbert et al., Appl. Environ. Microbiol. 73:7826-7836, 2007), including lrhA, encoding a transcription factor necessary for X. nematophila virulence, motility, and lipase production (G. R. Richards et al., J. Bacteriol. 190:4870-4879, 2008). CpxR positively regulates lrhA transcript, and we have shown that altered regulation of lrhA in the ΔcpxR1 mutant causes this strain's virulence defect. The ΔcpxR1 mutant expressing lrhA from a constitutive lac promoter showed wild-type virulence in M. sexta. These data suggest that CpxR contributes to X. nematophila virulence through the regulation of lrhA, immune suppression, and growth in Insecta.
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Andreas, Peter, Anna Kisiala, R. J. Neil Emery, Rosemarie De Clerck-Floate, John F. Tooker, Peter W. Price, Donald G. Miller III, Ming-Shun Chen et Edward F. Connor. « Cytokinins Are Abundant and Widespread among Insect Species ». Plants 9, no 2 (6 février 2020) : 208. http://dx.doi.org/10.3390/plants9020208.
Texte intégralRésumé :
Cytokinins (CKs) are a class of compounds that have long been thought to be exclusively plant growth regulators. Interestingly, some species of phytopathogenic bacteria and fungi have been shown to, and gall-inducing insects have been hypothesized to, produce CKs and use them to manipulate their host plants. We used high performance liquid chromatography-electrospray ionization tandem mass spectrometry (HPLC-MS/MS) to examine concentrations of a wide range of CKs in 17 species of phytophagous insects, including gall- and non-gall-inducing species from all six orders of Insecta that contain species known to induce galls: Thysanoptera, Hemiptera, Lepidoptera, Coleoptera, Diptera, and Hymenoptera. We found CKs in all six orders of insects, and they were not associated exclusively with gall-inducing species. We detected 24 different CK analytes, varying in their chemical structure and biological activity. Isoprenoid precursor nucleotide and riboside forms of trans-zeatin (tZ) and isopentenyladenine (iP) were most abundant and widespread across the surveyed insect species. Notably, the observed concentrations of CKs often markedly exceeded those reported in plants suggesting that insects are synthesizing CKs rather than obtaining them from the host plant via tissue consumption, compound sequestration, and bioaccumulation. These findings support insect-derived CKs as means for gall-inducing insects to manipulate their host plant to facilitate cell proliferation, and for both gall- and non-gall-inducing insects to modify nutrient flux and plant defenses during herbivory. Furthermore, wide distribution of CKs across phytophagous insects, including non-gall-inducing species, suggests that insect-borne CKs could be involved in manipulation of source-sink mechanisms of nutrient allocation to sustain the feeding site and altering plant defensive responses, rather than solely gall induction. Given the absence of any evidence for genes in the de novo CK biosynthesis pathway in insects, we postulate that the tRNA-ipt pathway is responsible for CK production. However, the unusually high concentrations of CKs in insects, and the tendency toward dominance of their CK profiles by tZ and iP suggest that the tRNA-ipt pathway functions differently and substantially more efficiently in insects than in plants.
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Dicke, M., J. Eilenberg, J. Falcao Salles, A. B. Jensen, A. Lecocq, G. P. Pijlman, J. J. A. van Loon et M. M. van Oers. « Edible insects unlikely to contribute to transmission of coronavirus SARS-CoV-2 ». Journal of Insects as Food and Feed 6, no 4 (11 août 2020) : 333–39. http://dx.doi.org/10.3920/jiff2020.0039.
Texte intégralRésumé :
In the context of food safety, edible insects are evaluated for biological hazards such as microbial pathogens according to regulations currently in place. When the European Food Safety Authority evaluated the hazards of edible insects as a potential source of pathogenic viruses for humans and livestock, the novel zoonotic coronavirus SARS-CoV-2 had not yet emerged but other pathogenic coronaviruses such as SARS (SARS-CoV) and MERS (MERS-CoV) were known. As a result of the COVID-19 pandemic, animal sources of protein for human consumption are being evaluated for the risks of being a transmission vector of coronaviruses, like SARS-CoV-2. Insects lack a receptor that can bind SARS-CoV-2, thus preventing the virus from replicating in insects, unlike some vertebrate livestock species and companion animals. Despite extensive monitoring, coronaviruses have never been recorded in insect microbiomes. Contamination of insects produced for food or feed may occur during the production process, resulting from rearing substrate or from insect farmers. However, the currently permitted rearing substrates do not include animal products and the farming process is highly automated, thus limiting interactions between farmers and insects. If contamination would still occur, the fact that the insects in production are not hosts to SARS-CoV-2 precludes virus replication and the further processing of the insects will destroy the contamination. We conclude that the hazard of edible insects being a transmission vector of SARS-CoV-2 is extremely low.
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Groot, Peter de, Jean J. Turgeon et Gordon E. Miller. « Status of cone and seed insect pest management in Canadian seed orchards ». Forestry Chronicle 70, no 6 (1 décembre 1994) : 745–61. http://dx.doi.org/10.5558/tfc70745-6.
Texte intégralRésumé :
Many of Canada's conifer seed orchards are entering their productive phase. In most, if not all seed orchards, insect pest management will be required in order to meet the seed production targets. Canadian seed orchard managers will soon need to know the basic requirements and what information is available to implement an insect pest management program. In this review, a synthesis is provided of the major components of an integrated pest management program for cone and seed insects. A list of the insect pests of conifer cones and seeds in Canada as well as features of their life cycles and population dynamics that could influence pest management strategies is presented. Current and future needs for insect damage appraisal and insect monitoring techniques are discussed. Finally, the various strategies and tactics to control insects are reviewed. Key words: conifer seed orchards, cone insects, seed insects, pest management strategies, integrated pest management
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Bertola, Michela, et Franco Mutinelli. « A Systematic Review on Viruses in Mass-Reared Edible Insect Species ». Viruses 13, no 11 (15 novembre 2021) : 2280. http://dx.doi.org/10.3390/v13112280.
Texte intégralRésumé :
Edible insects are expected to become an important nutrient source for animals and humans in the Western world in the near future. Only a few studies on viruses in edible insects with potential for industrial rearing have been published and concern only some edible insect species. Viral pathogens that can infect insects could be non-pathogenic, or pathogenic to the insects themselves, or to humans and animals. The objective of this systematic review is to provide an overview of the viruses detected in edible insects currently considered for use in food and/or feed in the European Union or appropriate for mass rearing, and to collect information on clinical symptoms in insects and on the vector role of insects themselves. Many different virus species have been detected in edible insect species showing promise for mass production systems. These viruses could be a risk for mass insect rearing systems causing acute high mortality, a drastic decline in growth in juvenile stages and in the reproductive performance of adults. Furthermore, some viruses could pose a risk to human and animal health where insects are used for food and feed.
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Shea, Patrick J. « PHYTOPHAGOUS INSECT COMPLEX ASSOCIATED WITH CONES OF WHITE FIR, ABIES CONCOLOR (GORD. AND GLEND.) LINDL., AND ITS IMPACT ON SEED PRODUCTION ». Canadian Entomologist 121, no 8 (août 1989) : 699–708. http://dx.doi.org/10.4039/ent121699-8.
Texte intégralRésumé :
AbstractWhite fir cones were sampled for insect damage from wild stands in California and Nevada during 1984–1986. Insects were recovered from cones and seed damage was partitioned by insect species. The important phytophagous insects were separated into guilds: the cone- and seed-mining guild, Dioryctria abietivorella Groté, Eucosma prob. siskiyouana (Kearfoot), Cydia prob. bracteatana (Fernald), Barbara sp.; the seed-feeding guild, Megastigmus pinus Parfitt, M. rafni Hoffmeyer, Earomyia abietum McAlpine; and the scale- and bract-feeding guild, Asynapta hopkinsi Felt, Dasineura prob. abiesemia Foote, Resseliella conicola (Foote), Strobilomyia abietis (Huckett). Total damage by insects varied by year and site, reaching a maximum of 47% in 1986 on one site and a minimum of 12.5% in 1984 on another. Abortion and incomplete development also were major factors in the production of sound seed. Populations of white fir cone and seed insects varied with cone crop but also were affected by the occurrence of cone crops on alternate hosts. During most years, the seed-mining guild insects were the major cause of seed damage.
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Delvendahl, Nora, Birgit A. Rumpold et Nina Langen. « Edible Insects as Food–Insect Welfare and Ethical Aspects from a Consumer Perspective ». Insects 13, no 2 (25 janvier 2022) : 121. http://dx.doi.org/10.3390/insects13020121.
Texte intégralRésumé :
A growing number of studies underline consumers’ concerns about the importance of animal welfare as a general concept for consumers’ purchase decisions. In particular, consumers perceive animal husbandry to be one of the most important aspects of animal welfare. Since intensive livestock production is criticized across society, the acceptance of current intensive production systems of edible insects is an issue of investigation. Criteria of insect welfare might differ from vertebrate welfare. One might argue that it is difficult to define standards for insect welfare due to their large diversity in living environments and feed requirements. In addition, it is debated whether insects are conscious and suffer from pain. It has been demanded to rear insects preferably under natural living conditions and some researchers proposed to consider them as sentient beings. Basic welfare and ethical aspects of insects as food and feed include species-specific mass rearing conditions and euthanasia, i.e., killing procedures. Consumers’ opinions and concerns regarding this issue have hardly been considered so far. In this paper, the animal welfare of prevalent livestock is defined and outlined, and relevant criteria are transferred to insect welfare. Different ways consumers might arrive at an animal welfare understanding are discussed, along with an overview of the few consumer studies on insect welfare. Furthermore, we consider how insects are presented in the public discourse and infer how this might be relevant to consumers’ perceptions of insect welfare.
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Madau, Fabio A., Brunella Arru, Roberto Furesi et Pietro Pulina. « Insect Farming for Feed and Food Production from a Circular Business Model Perspective ». Sustainability 12, no 13 (4 juillet 2020) : 5418. http://dx.doi.org/10.3390/su12135418.
Texte intégralRésumé :
The studies focused on the use of insects have outlined numerous reasons for using insects as food and feed as an important method to increase food opportunities for consumers. Insects have been emphasized as a food source with a low environmental impact due to the limited requirement for arable land and water, low ecological cost, and high-quality protein provision. In Europe and Western countries, insect farming is a growing business in which, however, some critical economic aspects must be recognized. The sector needs to be adequately promoted to rationally exploit the huge amount of potential. As such, the aim of this study was to analyze the recent research on economic aspects related to insect farming for feed and food production with the purpose of providing evidence of the critical economic points in this emerging sector. The focus was mainly oriented to understanding how insect farming can foster virtuous circular economic processes, specifically considering economic aspects on the basis of the limited literature currently available and the circular economic principles. A circular business model approach was proposed to address the entire insect-based feed and food supply chain from a circular economic perspective. In our opinion, the findings underline some economic research questions that need to be addressed in the near future, and the conceptual approach can be individualized to help increase cost- and eco-effectiveness from a circular economic perspective.
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Siriyah, Siti Latifatus, Miftakhul B. R. Khamid et Fawzy M. Bayfurqon. « Study of Insect Diversity in Rice Agroecosystem in Karawang West Java ». Jurnal ILMU DASAR 19, no 1 (23 février 2018) : 51. http://dx.doi.org/10.19184/jid.v19i1.5619.
Texte intégralRésumé :
Insects were collected from rice fields in Karawang West Java. Since insects are dominant in Rice field, their role in the ecosystem are important regarding the rice production. Therefore, the occurance of insect species and their role in ecosystem are important to understand. The aim of this reasearch was to study the insect occurance in rice field in Karawang to obtain the potential candidate for biological control agent. The insects were collected using sweep net, pit fall trap and light trap. Nine insect orders were collected and 49 morphospecies were identified including insect pest, parasitoids, predator, tourist and detritivore. Paederus sp., Cyrtohinus and Micraspis sp., were the most abundant entomophagous insect that is potential candidate for biological control agent in Karawang.
Keywords: insect, insect diversity, rice fields, karawang
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Durst, P. B., et Y. Hanboonsong. « Small-scale production of edible insects for enhanced food security and rural livelihoods : experience from Thailand and Lao People’s Democratic Republic ». Journal of Insects as Food and Feed 1, no 1 (1 janvier 2015) : 25–31. http://dx.doi.org/10.3920/jiff2014.0019.
Texte intégralRésumé :
Thailand and Lao People's Democratic Republic have long and rich histories of human consumption of insects, which have provided important contributions to food security and nutrition over the centuries. In the past, most insects were collected for non-commercial home consumption, but insects are now increasingly sold in local markets and to dealers as a source of cash income. While traditional household consumption remains important in many areas of the two countries, consumption patterns are evolving, with increased demand for insects as snacks and in urban areas. Production patterns are also evolving to include not only traditional harvesting of insects from wild habitats, but also semi-domestication and insect farming. Marketing practices are increasingly reflecting changing consumer preferences and demands and the growing population of urban consumers. Production, processing, and marketing of edible insects is providing important income, employment and livelihood opportunities across Thailand and Lao PDR, with new niche markets offering growing opportunities for entrepreneurs.
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Goodman, R., G. Hepworth, P. Kaczynski, B. McKee, S. Clarke et C. Bluett. « Honeybee pollination of buckwheat (Fagopyrum esculentum Moench) cv. Manor ». Australian Journal of Experimental Agriculture 41, no 8 (2001) : 1217. http://dx.doi.org/10.1071/ea99008.
Texte intégralRésumé :
The role of honeybees (Apis mellifera) in the pollination of buckwheat cv. Manor was studied in a commercial planting at Smeaton, Victoria. Honeybees comprised 80% of all insect visitors to this crop. Other insects included ladybirds (Coccinella transversalis and C. undecimpunctata), hoverflies (Meangyna viridiceps), drone flies (Eristalis sp.), blowflies (Calliphoridae), cabbage white butterflies (Pieris rapae), small bush flies and native bees. The activity of honeybees and other insects increased seed production from 91.5 g/plot (plots closed to insects) to 180.4 g/plot (plots open to insects).
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Khan, Tiyyabah, Ahmad Ali Shahid et Hafiz Azhar Ali Khan. « Could biorational insecticides be used in the management of aflatoxigenicAspergillus parasiticusand its insect vectors in stored wheat ? » PeerJ 4 (22 février 2016) : e1665. http://dx.doi.org/10.7717/peerj.1665.
Texte intégralRésumé :
Insect pests in stored wheat cause significant losses and play an important role in the dispersal of viable fungal spores of various species including aflatoxin producingAspergillus parasiticus. The problem of insecticide resistance in stored insects and environmental hazards associated with fumigants and conventional grain protectants underscore the need to explore reduced risk insecticides to control stored insects with the ultimate effect on aflatoxin production. The purpose of this study was to investigate the insecticidal potential of four biorational insecticides: spinosad, thiamethoxam, imidacloprid and indoxacarb, on wheat grains artificially infested withRhyzopertha dominica/Sitophilus oryzaeand/orA. parasiticusspores, and the subsequent effect on aflatoxin production. Spinosad and thiamethoxam were the most effective insecticides againstR. dominicacompared toS. oryzaefollowed by imidacloprid. Spinosad applied at 0.25–1 ppm and thiamethoxam at 2 and 4 ppm concentrations resulted in complete mortality ofR. dominica. However, indoxacarb was more toxic againstS. oryzaecompared toR. dominica. Wheat grains inoculated withR. dominica/S. oryzae+spores elicited higher aflatoxin levels than wheat grains inoculated with or without insecticide+spores. In all the treatment combinations containing insects, aflatoxin production was dependent on insects’ survival rate. In addition, thiamethoxam and imidacloprid had also a significant direct effect on reducing aflatoxin production. Aflatoxin levels were lower in the treatment combinations with any concentration of thiamethoxam/imidacloprid+spores as compared to wheat grains inoculated with spores only. Correlation analyses revealed highly significant and positive association between moisture contents/insect survival rate and production of aflatoxin levels, and insect survival rate and moisture contents of the wheat grains. In conclusion, the results of the present study provide baseline data on the use of biorational insecticides againstR. dominicaandS. oryzaeand subsequent effect on aflatoxin production.
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Rostaman, Rostaman, et Bambang Sugeng Suryatna. « Evaluasi Produktivitas Kutu Lak, Laccifer lacca Kerr. (Hemiptera : Kerridae) pada Tiga Jenis Tanaman Inang ». Jurnal Entomologi Indonesia 6, no 2 (15 décembre 2016) : 70. http://dx.doi.org/10.5994/jei.6.2.70.
Texte intégralRésumé :
Lac insects (Laccifer lacca Kerr) live parasitically on “kosambi” plants, and produce resins that are called lac. Lac are used for electronics, printing, textile, clothing, cosmetics, and food industry. The insects also live on various plants. The goal of this research was to evaluate the population quality of Lac insect that live on three host plants. The best parameter for population quality was biomass or lac production. Three host plants were inoculated by broods. The result showed that “kosambi” was the best host plant for the insect due to higher biomass (i.e lac production) than “kabesak putih” and “kabesak hitam” plants.
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AIKEN, R. B. « SOUND PRODUCTION BY AQUATIC INSECTS ». Biological Reviews 60, no 2 (mai 1985) : 163–211. http://dx.doi.org/10.1111/j.1469-185x.1985.tb00714.x.
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Francuski, Ljubinka, et Leo W. Beukeboom. « Insects in production – an introduction ». Entomologia Experimentalis et Applicata 168, no 6-7 (18 juin 2020) : 422–31. http://dx.doi.org/10.1111/eea.12935.
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Maino, James L., et Michael R. Kearney. « Testing mechanistic models of growth in insects ». Proceedings of the Royal Society B : Biological Sciences 282, no 1819 (22 novembre 2015) : 20151973. http://dx.doi.org/10.1098/rspb.2015.1973.
Texte intégralRésumé :
Insects are typified by their small size, large numbers, impressive reproductive output and rapid growth. However, insect growth is not simply rapid; rather, insects follow a qualitatively distinct trajectory to many other animals. Here we present a mechanistic growth model for insects and show that increasing specific assimilation during the growth phase can explain the near-exponential growth trajectory of insects. The presented model is tested against growth data on 50 insects, and compared against other mechanistic growth models. Unlike the other mechanistic models, our growth model predicts energy reserves per biomass to increase with age, which implies a higher production efficiency and energy density of biomass in later instars. These predictions are tested against data compiled from the literature whereby it is confirmed that insects increase their production efficiency (by 24 percentage points) and energy density (by 4 J mg −1 ) between hatching and the attainment of full size. The model suggests that insects achieve greater production efficiencies and enhanced growth rates by increasing specific assimilation and increasing energy reserves per biomass, which are less costly to maintain than structural biomass. Our findings illustrate how the explanatory and predictive power of mechanistic growth models comes from their grounding in underlying biological processes.
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Hingston, A. B., P. B. McQuillan et B. M. Potts. « Pollinators in seed orchards of Eucalyptus nitens (Myrtaceae) ». Australian Journal of Botany 52, no 2 (2004) : 209. http://dx.doi.org/10.1071/bt03015.
Texte intégralRésumé :
Flowers of the commercially important tree Eucalyptus nitens (Deane & Maiden) Maiden were visited by a diverse array of insects, but not by birds, in Tasmanian seed orchards. Most species of insects that visited the flowers of E. nitens are likely to be effective pollinators because all common species of visitors carried many grains of Eucalyptus pollen, and the open floral structure facilitates frequent insect contact with stigmas. Seed production also suggested that a wide variety of insects were effective pollinators because flowers were consistently well pollinated, despite differences in flower-visitor communities among orchards and particular branches of flowers. The generalised entomophilous pollination system of E. nitens suggests that effective pollinators should occur in seed orchards of this tree throughout the world, provided that flowering occurs at a time of year conducive to insect activity. Although a wide variety of insects appear to be effective pollinators of E. nitens, introduced honeybees, Apis mellifera L., that are often deployed as pollinators in seed orchards were consistently not attracted to the flowers. The reliance on wild insects as pollinators suggests that seed production in E. nitens may benefit from reduced use of broad-spectrum insecticides in, and near, seed orchards.
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Grau, Thorben, Andreas Vilcinskas et Gerrit Joop. « Sustainable farming of the mealworm Tenebrio molitor for the production of food and feed ». Zeitschrift für Naturforschung C 72, no 9-10 (26 septembre 2017) : 337–49. http://dx.doi.org/10.1515/znc-2017-0033.
Texte intégralRésumé :
AbstractThe farming of edible insects is an alternative strategy for the production of protein-rich food and feed with a low ecological footprint. The industrial production of insect-derived protein is more cost-effective and energy-efficient than livestock farming or aquaculture. The mealwormTenebrio molitoris economically among the most important species used for the large-scale conversion of plant biomass into protein. Here, we review the mass rearing of this species and its conversion into food and feed, focusing on challenges such as the contamination of food/feed products with bacteria from the insect gut and the risk of rapidly spreading pathogens and parasites. We propose solutions to prevent the outbreak of infections among farmed insects without reliance on antibiotics. Transgenerational immune priming and probiotic bacteria may provide alternative strategies for sustainable insect farming.
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Veldkamp, Teun, Nathan Meijer, Frank Alleweldt, David Deruytter, Leen Van Campenhout, Laura Gasco, Nanna Roos, Sergiy Smetana, Ana Fernandes et H. J. van der Fels-Klerx. « Overcoming Technical and Market Barriers to Enable Sustainable Large-Scale Production and Consumption of Insect Proteins in Europe : A SUSINCHAIN Perspective ». Insects 13, no 3 (12 mars 2022) : 281. http://dx.doi.org/10.3390/insects13030281.
Texte intégralRésumé :
The expected global population growth to 9.7 billion people in 2050 and the significant change in global dietary patterns require an increase in global food production by about 60%. The protein supply for feed and food is most critical and requires an extension in protein sources. Edible insects can upgrade low-grade side streams of food production into high-quality protein, amino acids and vitamins in a very efficient way. Insects are considered to be the “missing link” in the food chain of a circular and sustainable economy. Insects and insect-derived products have entered the European market since first being acknowledged as a valuable protein source for feed and food production in around 2010. However, today, scaling up the insect value chain in Europe is progressing at a relatively slow pace. The mission of SUSINCHAIN (SUStainable INsect CHAIN)—a four-year project which has received funding from the European Commission—is to contribute to novel protein provision for feed and food in Europe by overcoming the remaining barriers for increasing the economic viability of the insect value chain and opening markets by combining forces in a comprehensive multi-actor consortium. The overall project objective is to test, pilot and demonstrate recently developed technologies, products and processes, to realize a shift up to Technology Readiness Level 6 or higher. In addition to these crucial activities, the project engages with stakeholders in the insect protein supply chain for feed and food by living labs and workshops. These actions provide the necessary knowledge and data for actors in the insect value chain to decrease the cost price of insect products, process insects more efficiently and market insect protein applications in animal feed and regular human diets that are safe and sustainable. This paves the way for further upscaling and commercialization of the European insect sector.
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Busse, Maria, Felix Zoll, Rosemarie Siebert, Annette Bartels, Anke Bokelmann et Phillipp Scharschmidt. « How farmers think about insects : perceptions of biodiversity, biodiversity loss and attitudes towards insect-friendly farming practices ». Biodiversity and Conservation 30, no 11 (19 juillet 2021) : 3045–66. http://dx.doi.org/10.1007/s10531-021-02235-2.
Texte intégralRésumé :
AbstractAn alarming decrease of insects in number and variety calls for measures of protection and promotion, since insects are crucial for the functioning of ecosystems and provide multiple ecosystem services. Agricultural landscapes can provide vast insect habitats if they are managed accordingly. However, little is known about farmers’ problem awareness and attitudes toward insect biodiversity loss, related farming practises, or alternative acceptable insect-friendly solutions. To fill these research gaps, this paper aimed to reveal farmers’ perceptions and attitudes regarding these aspects in two German case studies. We conducted 23 semi-structured interviews with farmers in 2019 and qualitatively analysed them using semantic web analysis. Farmers mostly reported awareness of insects’ ecosystem services and disservices related to agricultural production rather than mentioning the holistic ecological importance of insects. About half of the farmers confirmed insect loss based on their own observations, whereas a similar number doubted there had been a decrease of insects. Most farmers are open-minded towards insect-friendly measures if financially compensated. The farmers also mentioned a joint societal responsibility for insects, economic pressure on farmers to use pesticides due to global market prices, and unbalanced agricultural policies. This study revealed in-depth insights into farmers’ thinking about insects and how farmers contextualise arguments. Our results identified overlaps in farmers’ mental models, which paves the way for co-designing insect-friendly farming practices in landscape labs. Local transformation efforts can also demonstrate new pathways for a shift on the higher levels.
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WITHANINGSIH, SUSANTI, CLARISA DITY ANDARI, PARIKESIT PARIKESIT et NURULLIA FITRIANI. « The effect of understory plants on pollinators visitation in coffee plantations : Case study of coffee plantations in West Bandung District, West Java, Indonesia ». Biodiversitas Journal of Biological Diversity 19, no 2 (1 mars 2018) : 554–62. http://dx.doi.org/10.13057/biodiv/d190231.
Texte intégralRésumé :
Withaningsih S, Andari CD, Parikesit, Fitriani N. 2018. The effect of understory plants on pollinators visitation in coffee plantations: Case study of coffee plantations in West Bandung District, West Java, Indonesia. Biodiversitas 19: 554-562. West Java is one of the excellent producers of the most expensive coffee in the world (Kopi Luwak). Coffee (Coffea spp.) is one of the crops that require insect pollination for fruit formation. Coffee production in Indonesia is declining in recent years despite the expansion of coffee cultivation area that increases by 2-5 times. The decline in coffee production has been associated with fewer visitations of pollinator insects. Visitations of pollinator insects can improve the quality and quantity of coffee, mainly from the abundance and diversity of pollinator insect. Abundance and diversity of pollinator insects can be improved by to providing them with flowering plants such as understory plants. This study aimed to prove the effect of the existence of flowering plants on the visitation of pollinator insects. Pollinator insects visiting coffee flowers were observed with an observation method in two observation units. The first unit was the location with understory plants while the second was the location without understory plants. The results showed that the abundance of pollinator insects visiting coffee flowers in unit 1 was significantly (P<0.05) higher than that in unit 2. However, the diversity of pollinator insects between the two locations did not differ significantly (P> 0.05).
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Tuhumury, H. C. D. « Edible insects : Alternative protein for sustainable food and nutritional security ». IOP Conference Series : Earth and Environmental Science 883, no 1 (1 octobre 2021) : 012029. http://dx.doi.org/10.1088/1755-1315/883/1/012029.
Texte intégralRésumé :
Abstract Any food systems applied has to ensure that the food is secure for the people. Nutritional needs are considered integral to the food security concept and sustainability is also important. One of the nutritional needs in food is protein. Proteins mostly obtained from animal-based sources such as meat and fish, plant-based proteins, particularly legumes. However, the production of meat, more importantly ruminant meat is more and more argued for some issues including environment, food safety, and animal welfare. In order to ensure sustainable protein production, the dietary change would be to use alternative protein sources such as insects. In general, insects have high protein content and excellent production efficiency compared with other conventional protein food groups. It is necessarily important to develop the use of insects in various forms, including pastes or powders, concentrates or isolates which can be used further as ingredients or fortified agents in new food product formulations. This paper therefore explores the feature of edible insects as sustainable and viable food source that can contribute to food security including, types of edible insects as food and their nutritional compositions; and processing of edible insects. In conclusion, insects can contribute to sustainable food and nutritional security and be a part of the solution to protein shortages. Insect protein concentrates could potentially be an alternative protein source in food formulation.
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Belluco, Simone, Michela Bertola, Fabrizio Montarsi, Guido Di Martino, Anna Granato, Roberto Stella, Marianna Martinello, Fulvio Bordin et Franco Mutinelli. « Insects and Public Health : An Overview ». Insects 14, no 3 (27 février 2023) : 240. http://dx.doi.org/10.3390/insects14030240.
Texte intégralRésumé :
Insects are, by far, the most common animals on our planet. The ubiquity and plethora of ecological niches occupied by insects, along with the strict and sometimes forced coexistence between insects and humans, make insects a target of public health interest. This article reports the negative aspects historically linked to insects as pests and vectors of diseases, and describes their potential as bioindicators of environmental pollution, and their use as food and feed. Both negative and positive impacts of insects on human and animal health need to be addressed by public health professionals who should aim to strike a balance within the wide range of sometimes conflicting goals in insect management, such as regulating their production, exploiting their potential, protecting their health and limiting their negative impact on animals and humans. This requires increased insect knowledge and strategies to preserve human health and welfare. The aim of this paper is to provide an overview of traditional and emerging topics bridging insects and public health to highlight the need for professionals, to address these topics during their work. The present and future role and activities of public health authorities regarding insects are analyzed.
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Lecocq, A., M. E. Natsopoulou, I. E. Berggreen, J. Eilenberg, L. H. Lau Heckmann, H. V. Nielsen, C. R. Stensvold et A. B. Jensen. « Probiotic properties of an indigenous Pediococcus pentosaceus strain on Tenebrio molitor larval growth and survival ». Journal of Insects as Food and Feed 7, no 6 (11 septembre 2021) : 975–86. http://dx.doi.org/10.3920/jiff2020.0156.
Texte intégralRésumé :
Optimising the production of insects for food and feed and ensuring their health are growing concerns for producers. Insects suffer from a range of insect pathogenic microorganisms, and the management of such diseases is essential. One solution is the introduction of beneficial probiotic bacteria into the diet of the insects. Here, we show that a lactic acid bacterial strain, Pediococcus pentosaceus, isolated from the gut of the mealworm, Tenebrio molitor, was able to inhibit the growth of selected insect pathogens in vitro. Using in vivo assessments of the host’s fitness benefits conferred by the lactic bacterium we show a significant effect of P. pentosaceus on larval growth rate and survival into adulthood. Gut microbiota analysis focusing on bacterial composition based on 16S rRNA gene amplicon sequencing suggests that P. pentosaceus could have successfully colonised the guts, or altered their bacteria, of the larvae that received it. Finally, we discuss our results in the context of mass insect production systems and outline the remaining work needed to explore and secure the role of beneficial bacterial additives in the field.
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Orkusz, Agnieszka, Wioletta Wolańska, Joanna Harasym, Arkadiusz Piwowar et Magdalena Kapelko. « Consumers’ Attitudes Facing Entomophagy : Polish Case Perspectives ». International Journal of Environmental Research and Public Health 17, no 7 (2 avril 2020) : 2427. http://dx.doi.org/10.3390/ijerph17072427.
Texte intégralRésumé :
Based on high nutritional value and low production costs, edible insects are an excellent and sustainable source of animal proteins. However, completely replacing meat with edible insects requires a change in consumer mentality not only in Poland, but also in other European countries. In western countries, most people reject eating insects, mainly for cultural reasons. Concerning this, the objective of the study was to examine the knowledge, behavior, and attitudes of the Polish community about edible insects and to understand the main factors driving edible insect consumption. The study was held at the Wroclaw University of Economics and Business, Poland and consisted of two parts: The survey (among 464 students) and the tasting session (among 402 participants). The main findings suggest that there is low willingness to adopt edible insects as a meat substitute among Polish students due to the psychological barriers, such as neophobia and disgust. However, the willingness to eat processed insect food (bread, biscuit) is far higher than for unprocessed whole insects. Environmental benefits are the factors that least affected students’ willingness to try edible insects. Additionally, the tasting session of the bread with powdered insects was attended by the vast majority of participants, which indicates that a positive sensory experience can improve the acceptability of insects as food.