Relevant bibliographies by topics / Lettuce, Diseases and pests

Academic literature on the topic 'Lettuce, Diseases and pests'

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Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Lettuce, Diseases and pests"

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Díaz, Beatriz M., Ricardo Biurrún, Aránzazu Moreno, Miguel Nebreda, and Alberto Fereres. "Impact of Ultraviolet-blocking Plastic Films on Insect Vectors of Virus Diseases Infesting Crisp Lettuce." HortScience 41, no. 3 (June 2006): 711–16. http://dx.doi.org/10.21273/hortsci.41.3.711.

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Ultraviolet (UV)-absorbing plastic films are being used as a photoselective barrier to control insect vectors and associated virus diseases in different horticultural crops. A 2-year experiment was carried out in northeastern Spain (Navarra) to evaluate the impact of a UV-blocking film (AD-IR AV) on the population density of insect pests and the spread of insect-transmitted virus diseases associated with head lettuce [Lactuca sativa (L.)]. Results showed that the UV-absorbing plastic film did not loose its ability to filter UV radiation after three lettuce crop cycles (14 months). The UV-absorbing plastic film was effective in reducing the abundance and in delaying the colonization of lettuce by aphids [Macrosiphum euphorbiae (Thomas) and Acyrthosiphum lactucae (Passerini)]. A significant increase in the percentage of marketable plants was achieved under UV-absorbing films due to a reduction in the number of plants infested by aphids and by insect-transmitted virus diseases (mainly potyviruses). Also the UV-absorbing plastic films were effective in reducing the population density of Frankliniella occidentalis (Pergande) and the spread of tomato spotted wilt virus (TSWV) as well as the population density of the lepidopteran pest, Autographa gamma (L.), a common pest of lettuce in Spain. However, no effective control of the greenhouse whitefly Trialeurodes vaporariorum (Westwood) was achieved. The results showed that UV-absorbing plastic films are a very promising tool to protect greenhouse lettuce from the main pests and insect-transmitted virus diseases occurring in northeastern Spain.
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Lebeda, A., E. Křístková, M. Kitner, B. Mieslerová, M. Jemelková, and D. A. C. Pink. "Resistance of wildLactucagenetic resources to diseases and pests, and their exploitation in lettuce breeding." Acta Horticulturae, no. 1101 (September 2015): 133–40. http://dx.doi.org/10.17660/actahortic.2015.1101.20.

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Křístková, E., I. Doležalová, A. Lebeda, V. Vinter, and A. Novotná. "Description of morphological characters of lettuce (Lactuca sativa L.) genetic resources." Horticultural Science 35, No. 3 (August 12, 2008): 113–29. http://dx.doi.org/10.17221/4/2008-hortsci.

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Lettuce (<i>Lactuca sativa</i>) is the most important crop in the group of leafy vegetables. It is characterized by considerable morphological and genetic variation. The crop comprises seven main groups of cultivars (including oilseed lettuce) differing phenotypically; they are usually described as morphotypes. Lettuce breeding is primarilly focused on various morphological features and resistance against diseases and pests. The accurate description of lettuce germplasm provides basic information useful for lettuce breeders. The construction of a lettuce descriptor list has been stimulated by the international genebank community. This list consists of 55 descriptors with 15 elucidated by figures. It provides a tool for detailed characterization of and discrimination within the intraspecific variation of <i>L. sativa</i>, verification of old varieties, and identification of putative duplicates and gaps in germplasm collections. These descriptors, along with descriptors of wild <i>Lactuca</i> species, provide an efficient analytical tool for studying the complex morphological variability of this genus and relationships among the species.
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Lebeda, Aleš, Eva Křístková, Miloslav Kitner, Barbora Mieslerová, Michaela Jemelková, and David A. C. Pink. "Wild Lactuca species, their genetic diversity, resistance to diseases and pests, and exploitation in lettuce breeding." European Journal of Plant Pathology 138, no. 3 (August 2, 2013): 597–640. http://dx.doi.org/10.1007/s10658-013-0254-z.

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5

Legarrea, S., B. M. Diaz, M. Plaza, L. Barrios, I. Morales, E. Viñuela, and A. Fereres. "Diminished UV radiation reduces the spread and population density of Macrosiphum euphorbiae (Thomas) [Hemiptera: Aphididae] in lettuce crops." Horticultural Science 39, No. 2 (May 14, 2012): 74–80. http://dx.doi.org/10.17221/79/2011-hortsci.

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UV-absorbing covers reduce the incidence of injurious insect pests and viruses in protected crops. In the present study, the effect of a UV-absorbing net (Bionet) on the spatio-temporal dynamics of the potato aphid on lettuce plants was evaluated. A field experiment was conducted during three seasons in two identical tunnels divided in four plots. A set of lettuce plants were artificially infested with Macrosiphum euphorbiae adults and the population was estimated by counting aphids on every plant over 7 to 9 weeks. Insect population grew exponentially but a significantly lower aphid density was present on plants grown under the UV-absorbing cover compared to a standard 50 mesh net. Similarly, in laboratory conditions, life table parameters were significantly reduced under the Bionet. Moreover, SADIE analysis showed that the spatial distribution of aphids was effectively limited under the UV-absorbing nets. Our results indicate that UV-absorbing nets should be considered as an important component of lettuce indoor cropping systems preventing pesticide applications and reducing the risk of spread of aphid-borne virus diseases.
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Neto, Hozano de Souza Lemos, Marcelo de Almeida Guimarães, Italo Marlone Gomes Sampaio, Janiquelle da Silva Rabelo, Caris dos Santos Viana, and Rosilene Oliveira Mesquita. "Can silicon (Si) influence growth, physiology and postharvest quality of lettuce?" January 2020, no. 14(01) 2020 (January 20, 2020): 71–77. http://dx.doi.org/10.21475/ajcs.20.14.01.p1848.

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Although it is not considered an essential element for plants, silicon (Si) provides benefits for several species, especially grasses, such as increase in yield and resistance to pests and diseases, reducing the effects of salt and water stress, among others. The aim of this study was to evaluate the effect of silicon on the performance of lettuce in hydroponic system. The experiment was carried out in a completely randomized design, with five doses of silicon (0, 2, 4, 6, 8 mM) in the nutrient solution. Shoot fresh and dry mass, gas exchanges, photosynthetic pigments and post-harvest were evaluated. It was observed that from the dose of 2 mM, there was a reduction in most variables. The dose of 0.4 mM [(-0.572)/(2*-0.7055)] provided a greater increase in shoot fresh mass. The highest photosynthetic rate was at the dose of 3.19 mM. Soluble solids, titratable acidity and pH were higher at the 4 mM dose. Silicon provides better lettuce production, with a dose of 0.4 mM allowing a greater shoot fresh mass, being the most indicated for lettuce cultivation in hydroponic system.
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Panić, Milica, and Ferenc Bagi. "Viruses of arugula." Biljni lekar 48, no. 5 (2020): 503–9. http://dx.doi.org/10.5937/biljlek2005503p.

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Arugula is a leafy vegetable crop belonging to the Brassicaceae family, currently grown in several agricultural areas around the world. The two main species that are mostly grown as lettuce crops are Eruca sativa ("cultivated" rocket) and Diplotaxis tenuifolia ("wild" rocket). It is distributed all over the world and is usually consumed fresh (leaves) due to its typical sharp spicy taste. It has a variety of medicinal and therapeutic properties. It is grown in open fields or more often in greenhouses. Along with the increase in the demand for arugula and the intensification of production, an increasing occurrence of diseases and pests has been recorded. Viral diseases are a limiting factor for successful production and a potential threat to the failure of crops. Therefore, this research provides an overview of the literature of viruses registered so far on arugula. As viruses are a serious problem in plant production, and in arugula it is insufficiently researched, it is necessary to further elaborate on this topic.
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Ivanova, I. P. "Подбор сортов салата листового для выращивания в зимних теплицах в условиях Центральной Якутии." Vestnik APK Verhnevolzh`ia, no. 2(46) (June 30, 2019): 11–14. http://dx.doi.org/10.35694/yarcx.2019.46.2.003.

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Определены сорта листового салата для выращивания в зимних теплицах методом подтопления в условиях Центральной Якутии, оптимальные по урожайности и качественным показателям, устойчивости к основным болезням и вредителям, проанализирован потребительский спрос. В опытах изучалось пять сортов и гибридов салата листового: Дубачек, Изумрудное кружево, Фанли F1, Азарт, Лифли F1. Опыты проводились в зимней остеклённой теплице общей площадью 324 м2, из них полезной площади 230 м2. Применяется органический субстрат на основе верхового сфагнового торфа, заправленный удобрениями и нейтрализованный до pH 5,56,0. В субстрат перед применением добавляется в качестве рыхлящего вещества агроперлит в соотношении 2:1. Повторность опытов четырёхкратная. Для выращивания рассады используются контейнеры на 64 и 54 ячейки, а для её выращивания до товарной спелости используются контейнеры с 8ю отверстиями, в которые вставляются стаканчики с рассадой. Установлено, что наиболее скороспелыми являются сорта Изумрудное кружево и Дубачек. Наибольшие показатели следующие: количество листьев у гибрида Фанли эффективность выращивания у сорта Дубачек (урожайность 4,15 кг/м2) масса одного растения у сорта Дубачек (155 г). Отмечено, что сорт Дубачек также является скороспелым и наиболее устойчивым к основным болезням листового салата.The varieties of leaf lettuce for growing in heated houses by the flooding method in the conditions of Central Yakutia optimal in terms of yield and quality indicators, resistance to major diseases and pests were determined consumer demand was analyzed. In the experiments five varieties and hybrids of leaf lettuce were studied: Dubachek, Izumrudnoe kruzhevo, Fanly F1, Azart, Lifli F1. The experiments were carried out in a winter glazed heated house with a total area of 324 m2 of which 230 m2 of useful area. An organic loadings based on highbog peat fertilized with fertilizers and neutralized to pH 5.56.0 is used. Before use agroperlite is added as a loosening agent in a 2:1 ratio to the substrate. The repetition of experiments is fourfold. Microgreen growing container for 64 and 54 cells for growing seedlings are used and for growing them to commercial ripeness containers with 8 holes are used into which cups of seedlings are inserted. It is established that the most early ripening varieties are Izumrudnoe kruzhevo and Dubachek. The greatest indicators are as follows: the number of leaves is in the Fanley hybrid cultivation efficiency in the Dubachek variety (yield 4.15 kg/m2) the mass of one plant is in the variety Dubachek (155 g). It is noted that the Dubachek variety is also early ripening and the most resistant to the main diseases of leaf lettuce.
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Nali, C. "First Report of Erysiphe cichoracearum Infecting Hedera canariensis var. azorica in Italy." Plant Disease 83, no. 2 (February 1999): 198. http://dx.doi.org/10.1094/pdis.1999.83.2.198d.

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A powdery mildew disease of variegated ivy (Hedera canariensis L. var. azorica) was observed on the Tyrrhenian coast in Tuscany (Italy) in spring 1998. Symptoms began as small, nearly circular reddish spots that later enlarged and coalesced. The hyaline mycelium produced abundant, ellipsoid conidia in long chains that ranged from 20 to 40 μm in length and from 12 to 25 μm in width. Cleistothecia were globose (100 to 120 μm diameter), dark brown (when mature) with a basal ring of mycelioid appendages, and contained several (up to 20) ovate asci, each generally containing two ascospores. Ascospores were hyaline, one-celled, ellipsoid (20 to 35 μm in length and 10 to 20 μm in width). The morphological characteristics of this fungus were those given for Erysiphe cichoracearum DC. Infection also was found on English ivy (Hedera helix L.). It is reported that this species is, occasionally, subject to powdery mildew caused by E. cichoracearum (1). Conidia from infected leaves were shaken onto leaves of melon (Cucumis melo L.), cucumber (Cucumis sativus L.), watermelon (Citrullus lanatus [Thunb.] Matsum. & Nakai), lettuce (Lactuca sativa L.), tomato (Lycopersicon esculentum Mill.), tobacco (Nicotiana tabacum L.) and variegated and English ivy. After 7 days, the disease was observed on cucumber, melon, watermelon, tobacco, and variegated ivy. Examination confirmed that test plants were infected with E. cichoracearum. This is the first report of E. cichoracearum on variegated ivy in Italy. Reference: (1) P. P. Pirone. 1970. Diseases and Pests of Ornamental Plants. The Ronald Press, New York.
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Chellemi, D. O., A. Gamliel, J. Katan, and K. V. Subbarao. "Development and Deployment of Systems-Based Approaches for the Management of Soilborne Plant Pathogens." Phytopathology® 106, no. 3 (March 2016): 216–25. http://dx.doi.org/10.1094/phyto-09-15-0204-rvw.

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Biological suppression of soilborne diseases with minimal use of outside interventive actions has been difficult to achieve in high input conventional crop production systems due to the inherent risk of pest resurgence. This review examines previous approaches to the management of soilborne disease as precursors to the evolution of a systems-based approach, in which plant disease suppression through natural biological feedback mechanisms in soil is incorporated into the design and operation of cropping systems. Two case studies are provided as examples in which a systems-based approach is being developed and deployed in the production of high value crops: lettuce/strawberry production in the coastal valleys of central California (United States) and sweet basil and other herb crop production in Israel. Considerations for developing and deploying system-based approaches are discussed and operational frameworks and metrics to guide their development are presented with the goal of offering a credible alternative to conventional approaches to soilborne disease management.
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Dissertations / Theses on the topic "Lettuce, Diseases and pests"

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Kerns, David L., and Tony Tellez. "Tank Mixing New Insecticide Chemistries with a Pyrethroid Insecticide for Control of Lepidopterous Pests in Head Lettuce, 1997." College of Agriculture, University of Arizona (Tucson, AZ), 1999. http://hdl.handle.net/10150/221679.

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Confirm, Success and Proclaim were evaluated for lepidopterous insect control in lettuce with and without the addition of Mustang 1.5EW. Success and Proclaim used alone were highly efficacious toward cabbage looper and Heliothinae and did not appear to benefit greatly from the addition of Mustang. However, Confirm's activity towards Heliothinae was significantly improved by the addition of Mustang. Additionally, on large framed plants where coverage is difficult, Confirm benefitted from the addition of a pyrethroid for control of loopers.
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Sultan, Youneskhan 1957. "Rhythm of zoospore production of pythium on lettuce cultured hydroponically." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/276687.

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Zoospore production of Pythium dissotocum Drechs. in the nutrient solution of hydroponically-grown lettuce, in the greenhouse, was shown to be cyclic. The number of zoospores detected in the nutrient solution was lowest around noontime, (11:00-14:00 hr) and highest around 20:00 hr. Growth chamber studies were conducted to determine the effect of different light periods on zoospore production. Under continuous light or continuous darkness, the population of zoospores in the nutrient solution decreased. But under 12 hours light, and 12 hours darkness or two periods of light each for 3 hours, zoospore populations decreased during the light period but increased during the dark period.
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Mercier, Julien. "Studies of the phylloplane microflora of lettuce and its interactions with pesticides and Sclerotinia sclerotiorum." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65425.

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Gracia, Javier. "Lettuce stunt : effect of Pythium populations and interactions between Pythium tracheiphilum and nematodes." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59387.

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This research has focused on the determination of natural populations in the fields, the effect of different inoculum densities on lettuce growth and a study of the association of this fungus with two nematodes (Pratylenchus penetrans Cobb and Meliodogyne hapla Chitwood). Under conditions of artificial infestation of soil the results were satisfactory, but in trials with naturally infested soil the fungus could not be detected. The effect of different inoculum densities was measured at different stages of growth, and only in those plants inoculated 2 weeks after seeding were differences significant and consistent. Some evidence of the detrimental effect of wounding the root system prior to attack by the fungus led to studies of the relationship between this fungus with either P. penetrans or M. hapla. In the first case a negative interaction seemed to exist; no significant increase of the damage caused to the lettuce was observed. In contrast, when the root-knot nematodes and P. tracheiphilum were combined there was a marked reduction of lettuce growth. The interaction was found to be additive.
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Tchervenivanova, Eli. "Development of a model to predict sporulation of Bremia lactucae in lettuce." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=23943.

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The effect of temperature and duration of leaf wetness (DLW) on sporulation of Bremia lactucae was determined for lettuce cv. Ithaca. A single spore isolate of B. lactucae was produced and was identified using lettuce differential lines each of which had known gene for resistance. Potted lettuce plants were inoculated with the isolate and incubated at 15 C, at 100% relative humidity for 24 h and then at a relative humidity lower than 70%. Seven days later, the plants were submitted to five different temperatures (5, 10, 15, 20 and 25 C) and six durations of leaf wetness (4, 6, 8, 10, 12 and 14 h). The number of spores produced was determined at the end of each wet period. After 4 h of incubation no spores were observed at any of the temperatures. Highest number of spores was found at 10 and 15 C for more than 10 h of DLW. The rate of sporulation rapidly increased between 8 and 10 h for all the temperatures, including 25 C, where the amount of spores produced was very low. The observed number of spores was transformed into proportion of maximum sporulation (PMS) by providing each data by the maximum number of spores observed for each experiment. The Richards model was used to describe sporulation as a function of leaf wetness duration and the rate and maximum value expressed as a function of temperature. This approach resulted in a three-dimensional equation that explained 87% of the variation in the PMS. Spore viability was also estimated for each temperature and DLW. It was zero after 6 h of incubation and reached almost the maximum after 10 h for all the temperatures. The sporulation model was validated under field conditions and it predicted high, medium, low, or no sporulation in 8 out of 11 times.
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Toussaint, Vicky. "Ecology of Xanthomonas campestris pv. vitians in relation to development of bacterial leaf spot of lettuce by Vicky Toussaint." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=37850.

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In Quebec, bacterial leaf spot of lettuce was observed for the first time in 1994. Since this first mention, the disease has been observed each year and the severity varied with environmental conditions. Little information was available on this disease because until recently it was only sporadically observed around the world following the first mention in 1918. In this project, we found that two groups of Xanthomonas caused the bacterial leaf spot of lettuce according to the BIOLOG profiles. From the results of strain characterization, a semi-selective medium has been developed to detect and quantify X. campestris pv. vitians. This medium is made of maltose, tryptone, methyl green, phosphate salts, amoxicillin, cephalothin, cycloheximide and trace elements. It allowed us to carry out studies on the ecology of the pathogen and on the disease epidemiology. The effect of weather conditions on bacterial population size and the bacterial leaf spot development has been studied. Weather parameters influencing the bacterial population were the number of hours with temperature higher than 28°C, the number of hours with wind velocity lower than 1 km per hour, the number of hours with relative humidity lower than 45% and the minimum relative humidity. The weather parameters that significantly discriminated between disease increase categories were the mean solar radiation, the number of hours with relative humidity higher than 90%, the mean relative humidity and the maximum temperature. Looking at the relationship between X. campestris pv. vitians population size and host plant development, it was shown that both bacterial population size and disease severity increased with leaf age. Mathematical models were developed to show these relationships. This information will be useful in disease management to decide when to apply bactericides and when to harvest. Finally, an exploratory study was conducted looking at the effects of nutrients on the size of saprophytic bacterial
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Carignan, Sylvie. "Evaluation of the potential of the exotic larval parasitoid Peristenus digoneutis Loan as a biological control agent against the tarnished plant bug, Lygus lineolaris (Palisot de Beauvois), in lettuce and celery crops in muck soils of southwestern Quebec." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=23387.

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In the agricultural muck soil area of southwestern Quebec, two native parasitoids, Peristenus pallipes and P. pseudopallipes (Hymenoptera: Braconidae) were found to parasitize nymphs of the tarnished plant bug Lygus lineolaris (Hemiptera: Miridae), on various flowering plants and on cultivated lettuce. Parasitism levels (ranging from 1.3% to 92.3%) varied with host plant species sampled, and with methods used for the calculation of percentage parasitism. The percentage parasitism of tarnished plant bug populations was expressed as pooled values from all samples in the season (method 1), and by the Southwood and Jepson's graphical method (method 2). Phenology of parasitism, defined as the time during which female parasitoids are active in the field, was evaluated for both native parasitoid species. The cold-hardiness of P. digoneutis, a European nymph parasitoid introduced in northern United States, was evaluated in the laboratory by measuring the supercooling point and cumulative cold damage at sub-zero temperatures. When compared to the native P. pallipes and P. pseudopallipes the exotic parasitoid showed the same capacity to withstand cold temperatures. Prior to introduction, the evaluation of the impact of P. digoneutis on indigenous species will require a rapid identification to species level. The development of immature stages of P. digoneutis was studied to find taxonomic and developmental differences between the three species. At $21 pm1 sp circ$C, the egg matures in five days, and there are three larval instars, the first two molting inside the host while the third emerges from the host, three to four weeks after egg deposition. Adult characters of the pre-imaginal stage can be used to distinguish the exotic P. digoneutis from the two native species since mouth sclerites of the final instar larvae of P. digoneutis, P. pallipes and P. pseudopallipes do not possess reliable distinguishing characters. (Abstract shortened by UMI.)
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Pretorius, Rudolph Johannes. "A plant health management system for aphididae on lettuce under variable shadehouse conditions in the central Free State, South Africa." Thesis, Bloemfontein : Central University of Technology, Free State, 2008. http://hdl.handle.net/11462/114.

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Thesis (M. Tech) --Central University of Technology, Free State, 2008
Aphids (Hemiptera: Aphididae) are amongst the most destructive insects in agricultural crop production systems. This reputation stems from their complex life cycles which are mostly linked to a parthenogenetic mode of reproduction, allowing them to reach immense population sizes within a short period of time. They are also notorious as important and efficient vectors of several plant viral diseases. Their short fecund life cycles allow them to be pests on crops with a short growth period, e.g. lettuce (Lactuca sativa L.). It is common practice to provide this crop with some degree of protection from environmental extremes on the South African Highveld. Shadehouses are popular in this regard, but aphids are small enough to find their way into these structures, and their presence on lettuce is discouraged due to phytosanitary issues. In addition, the excessive use of insecticides is criticized due to the negative influence on human health, and because aphids can rapidly develop resistance. This necessitates the use of alternative control options in order to suppress aphid numbers. Biological control is popular in this regard and the use of predatory ladybirds (Coleoptera: Coccinellidae) is a popular choice. This study investigated the aphid and coccinellid species complex encountered under varying shadehouse conditions on cultivated head lettuce in the central Free State Province (South Africa). Their seasonality was also examined, along with variations in their population size throughout a one-year period. Finally, the impact of varying aphid populations on some physical characteristics of head lettuce was examined, and recommendations for aphid control (using naturally occurring coccinellid predators) were made. Two shadehouse structures were evaluated during this study. One was fully covered with shade netting and designed to exclude the pugnacious ant, Anoplolepis custodiens (Hymenoptera: Formicidae), while the other was partially covered with shade netting (on the roof area) allowing access to the ants. Six cycles of head lettuce were planted and sampled four times during each cycle. These were scheduled to monitor the seedling, vegetative and heading stage of lettuce. Four important aphid species were recorded on the lettuce, namely Acyrthosiphon lactucae, Nasonovia ribisnigri, Myzus persicae and Macrosiphum euphorbiae. Both structures harboured similar aphid and coccinellid species, but their population dynamics differed. A. lactucae dominated in the absence of A. custodiens in the fully covered structure (whole study), while N. ribisnigri dominated in the partially covered structure in the presence of these ants during the warmer months (December – January). M. euphorbiae replaced this species as the dominant species in the absence of A. custodiens (April – September). M. persicae occured during the winter (May – August) in the fully covered structure. Promising coccinellid predators were Hippodamia variegata and Scymnus sp. 1, and to a lesser extent, Exochomus flavipes and Cheilomenes lunata. However, the fully covered structure hampered the entrance of the larger adult coccinellid species, resulting in their lower occurrence. Aphid and coccinellid activity peaked during the summer months (October – January), and the fully covered structure attained the highest aphid infestation levels and coccinellid larval numbers during this time. On the other hand, aphid numbers were higher in the partially covered structure during the cooler months of the year (April – July) and this structure also harboured more adult coccinellids. In most cases, aphid infestation levels did not affect the amount of leaves formed. However, symptomatic damage in terms of head weight reduction did occur under severe infestation levels. Specific environmental conditions within a shadehouse structure concurrently contributed to this reduction, with less favourable conditions accelerating this condition. Results from this study have shown that even though the type of shadehouse structure does not influence the insect species complex found on lettuce, it does have an influence on detrimental and beneficial insect population dynamics. Aphid species infesting lettuce have been identified, along with coccinellid predators that could potentially be used in their control. Both types of structures had advantages and disadvantages, and therefore, decisions concerning shadehouses should not be focused on which type of structure to use, but rather which type of structure to use during different seasons of the year.
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Trembley, Marcella L. "The effect of mechanical weed cultivation on crop yield and quality, disease incidence and phenology in snap bean, carrot and lettuce crops." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0003/MQ29801.pdf.

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10

Gumede, Halalisani. "The development of a putative microbial product for use in crop production." Thesis, Rhodes University, 2008. http://eprints.ru.ac.za/1352/.

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Books on the topic "Lettuce, Diseases and pests"

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Inglis, Debbie. Anthracnose on lettuce. Pullman: Washington State University, Cooperative Extension, 1997.

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2

Chaput, J. Integrated pest management for onions, carrots, celery and lettuce in Ontario: A handbook for growers, scouts and consultants. Toronto, Ont: Ministry of Agriculture and Food, 1993.

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Moline, Harold E. Market diseases of beets, chicory, endive, escarole, globe artichokes, lettuce, rhubarb, spinach, and sweetpotatoes. [Washington, D.C.?]: U.S. Dept. of Agriculture, Agricultural Research Service, 1987.

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Moline, Harold E. Market diseases of beets, chicory, endive, escarole, globe artichokes, lettuce, rhubarb, spinach, and sweetpotatoes. [Washington, D.C.?]: U.S. Dept. of Agriculture, Agricultural Research Service, 1987.

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United States. Agricultural Research Service., ed. Market diseases of beets, chicory, endive, escarole, globe artichokes, lettuce, rhubarb, spinach, and sweetpotatoes. [Washington, D.C.?]: U.S. Dept. of Agriculture, Agricultural Research Service, 1987.

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Andrew, Halstead, and Royal Horticultural Society (Great Britain), eds. Pests & diseases. London: Dorling Kindersley, 1997.

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Beatrice, Henricot, ed. Pests and diseases. New York: DK Publishing, 2010.

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Pests and diseases. [Place of publication not identified]: Aura, 1998.

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Andrew, Halstead, and Royal Horticultural Society, eds. Garden pests & diseases. London: Mitchell Beazley, 1992.

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Society, American Horticultural, ed. Pests and diseases. New York: Dorling Kindersley, 2000.

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Book chapters on the topic "Lettuce, Diseases and pests"

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Morgan, Lynette. "Hydroponic production of selected crops." In Hydroponics and protected cultivation: a practical guide, 196–228. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789244830.0196.

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Abstract While there is a wide range of potentially profitable crops which can be grown in hydroponics under protected cultivation, greenhouse production is dominated by fruiting crops such as tomatoes, cucumber, capsicum and strawberries, and vegetative species such as lettuce, salad and leafy greens, herbs and specialty crops like microgreens. This chapter summarizes information on a selected range of common hydroponic crops to give basic procedures for each and an outline of the systems of production. These crops include tomato, capsicum or sweet bell pepper, cucumber, lettuce and other salad greens, strawberry and rose. Information is given on their hydroponic production systems and environment, propagation, plant density, pruning, pollination, fruit growth, crop nutrition, pests, diseases, disorders, harvesting and postharvest handling.
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Morgan, Lynette. "Hydroponic production of selected crops." In Hydroponics and protected cultivation: a practical guide, 196–228. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789244830.0011a.

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Abstract While there is a wide range of potentially profitable crops which can be grown in hydroponics under protected cultivation, greenhouse production is dominated by fruiting crops such as tomatoes, cucumber, capsicum and strawberries, and vegetative species such as lettuce, salad and leafy greens, herbs and specialty crops like microgreens. This chapter summarizes information on a selected range of common hydroponic crops to give basic procedures for each and an outline of the systems of production. These crops include tomato, capsicum or sweet bell pepper, cucumber, lettuce and other salad greens, strawberry and rose. Information is given on their hydroponic production systems and environment, propagation, plant density, pruning, pollination, fruit growth, crop nutrition, pests, diseases, disorders, harvesting and postharvest handling.
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Gratwick, Marion. "Lettuce aphids." In Crop Pests in the UK, 51–55. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-1490-5_10.

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Emmett, B. "Pests of Composite Crops: Lettuce." In Vegetable Crop Pests, 74–86. London: Palgrave Macmillan UK, 1992. http://dx.doi.org/10.1007/978-1-349-09924-5_3.

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Laksono, N. D., U. Setiawati, F. Nur, M. Rahmaningsih, Y. Anwar, H. Rusfiandi, B. P. Forster, E. H. Sembiring, A. S. Subbarao, and H. Zahara. "Pests and diseases." In Nursery practices in oil palm: a manual, 77–85. Wallingford: CABI, 2019. http://dx.doi.org/10.1079/9781789242140.0077.

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Thompson, Anthony Keith, and Ibok Oduro. "Diseases and pests." In Yams: botany, production and uses, 76–90. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789249279.0006.

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Abstract This chapter describes the different diseases and pests that affect yams and various methods for their control. It particularly covers the following aspects: field fungal diseases; postharvest fungal diseases; specific fungal diseases; control of fungal diseases; bacterial diseases; viral diseases; physiological disorders; insect pests; and nematode pests.
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Sipes, Brent, and Koon-Hui Wang. "Pests, diseases and weeds." In Handbook of Pineapple Technology, 62–88. Chichester, UK: John Wiley & Sons, Ltd, 2016. http://dx.doi.org/10.1002/9781118967355.ch4.

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Thompson, A. K., R. K. Prange, R. D. Bancroft, and T. Puttongsiri. "Pests, diseases and disorders." In Controlled atmosphere storage of fruit and vegetables, 64–74. Wallingford: CABI, 2018. http://dx.doi.org/10.1079/9781786393739.0064.

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Lebot, V. "Cassava: pests and diseases." In Tropical root and tuber crops: cassava, sweet potato, yams and aroids, 73–88. Wallingford: CABI, 2020. http://dx.doi.org/10.1079/9781789243369.0073.

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Lebot, V. "Yams: pests and diseases." In Tropical root and tuber crops: cassava, sweet potato, yams and aroids, 293–307. Wallingford: CABI, 2020. http://dx.doi.org/10.1079/9781789243369.0293.

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Conference papers on the topic "Lettuce, Diseases and pests"

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Munkvold, Gary P. "Managing Diseases and Pests with Seed Treatments." In Proceedings of the 16th Annual Integrated Crop Management Conference. Iowa State University, Digital Press, 2007. http://dx.doi.org/10.31274/icm-180809-893.

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Tumang, Gina S. "Pests and Diseases Identification in Mango using MATLAB." In 2019 5th International conference on Engineering, Applied Sciences and Technology (ICEAST). IEEE, 2019. http://dx.doi.org/10.1109/iceast.2019.8802579.

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Wang, Qiyao, Guiqing He, Feng Li, and Haixi Zhang. "A novel database for plant diseases and pests classification." In 2020 IEEE International Conference on Signal Processing, Communications and Computing (ICSPCC). IEEE, 2020. http://dx.doi.org/10.1109/icspcc50002.2020.9259502.

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Patel, Pruthvi P., and Dineshkumar B. Vaghela. "Crop Diseases and Pests Detection Using Convolutional Neural Network." In 2019 IEEE International Conference on Electrical, Computer and Communication Technologies (ICECCT). IEEE, 2019. http://dx.doi.org/10.1109/icecct.2019.8869510.

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Kulikov, M. A., A. N. Kulikova, and A. V. Goncharov. "Resistance of sunflower hybrids to herbicides, diseases, pests and weeds." In Растениеводство и луговодство. Тимирязевская сельскохозяйственная академия, 2020. http://dx.doi.org/10.26897/978-5-9675-1762-4-2020-158.

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Xiaopeng, Dai, and Li Donghui. "Research on Rice Pests and Diseases Warning Based on CBR." In 2013 Fifth International Conference on Computational and Information Sciences (ICCIS). IEEE, 2013. http://dx.doi.org/10.1109/iccis.2013.454.

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Alfarisy, Ahmad Arib, Quan Chen, and Minyi Guo. "Deep learning based classification for paddy pests & diseases recognition." In ICMAI '18: 2018 International Conference on Mathematics and Artificial Intelligence. New York, NY, USA: ACM, 2018. http://dx.doi.org/10.1145/3208788.3208795.

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Zhang, Ning, Zuochang Ye, and Yan Wang. "An End-to-end System for Pests and Diseases Identification." In IVSP '20: 2020 2nd International Conference on Image, Video and Signal Processing. New York, NY, USA: ACM, 2020. http://dx.doi.org/10.1145/3388818.3389155.

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Shijie, Jia, Jia Peiyi, Hu Siping, and sLiu Haibo. "Automatic detection of tomato diseases and pests based on leaf images." In 2017 Chinese Automation Congress (CAC). IEEE, 2017. http://dx.doi.org/10.1109/cac.2017.8243388.

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Materne, Ntihemuka, and Masahiro Inoue. "IoT Monitoring System for Early Detection of Agricultural Pests and Diseases." In 2018 12th South East Asian Technical University Consortium (SEATUC). IEEE, 2018. http://dx.doi.org/10.1109/seatuc.2018.8788860.

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Reports on the topic "Lettuce, Diseases and pests"

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Solomon, J. D., T. D. Leininger, A. D. Wilson, R. L. Anderson, L. C. Thompson, and F. I. McCracken. Ash pests: a guide to major insects, diseases, air pollution injury, and chemical injury. New Orleans, LA: U.S. Department of Agriculture, Forest Service, Southern Forest Experiment Station, 1993. http://dx.doi.org/10.2737/so-gtr-096.

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Solomon, J. D., T. D. Leininger, A. D. Wilson, R. L. Anderson, L. C. Thompson, and F. I. McCracken. Ash pests: a guide to major insects, diseases, air pollution injury, and chemical injury. New Orleans, LA: U.S. Department of Agriculture, Forest Service, Southern Forest Experiment Station, 1993. http://dx.doi.org/10.2737/so-gtr-96.

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Kosiba, Alexandra, Emma Tait, Gene Desideraggio, Alyx Belisle, Clarke Cooper, and James Duncan. Threats to the Urban Forest: The potential economic impacts of invasive forest pests and diseases in the Northeast. Forest Ecosystem Monitoring Cooperative, June 2020. http://dx.doi.org/10.18125/8w9j42.

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A 40-Year Retrospective of APHIS, 1972–2012. United States Department of Agriculture, Animal and Plant Health Inspection Service, January 2012. http://dx.doi.org/10.32747/2012.7204068.aphis.

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Since APHIS was formed in 1972, it has evolved into a multi-faceted Agency with responsibilities that include protecting and promoting U.S. agricultural health from foreign pests and diseases, regulating genetically engineered organisms, administering the Animal Welfare Act, and carrying out wildlife damage management activities. It has been 15 years since APHIS compiled a history of its mission and activities. This year, 2012, marks both the 40th anniversary of the Agency and the 150th anniversary of USDA, providing a unique opportunity to put that history in context. This retrospective briefly examines the history of animal and plant health regulation within USDA, assesses APHIS' development over four decades, includes biographies of the Agency’s Administrators, and provides snapshots of some of the milestone issues and events that define the Agency’s history and its accomplishments.
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Plant Protection and Quarantine: Helping U.S. Agriculture Thrive--Across the Country and Around the World, 2016 Annual Report. U.S. Department of Agriculture, Animal and Plant Health Inspection Service, March 2017. http://dx.doi.org/10.32747/2017.7207241.aphis.

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For Plant Protection and Quarantine (PPQ) and our partners, 2016 was a year of remarkable successes. Not only did we eradicate 10 fruit fly outbreaks, but we also achieved 4 years with zero detections of pink bollworm, moving us one step closer to eradicating this pest from all commercial cotton-growing areas of the continental United States. And when the U.S. corn industry faced the first-ever detection of bacterial leaf streak (Xanthomonas vasicular pv vasculorum), we devised a practical and scientific approach to manage the disease and protect valuable export markets. Our most significant domestic accomplishment this year, however, was achieving one of our agency’s top 10 goals: eliminating the European grapevine moth (EGVM) from the United States. On the world stage, PPQ helped U.S. agriculture thrive in the global market-place. We worked closely with our international trading partners to develop and promote science-based standards, helping to create a safe, fair, and predictable agricultural trade system that minimizes the spread of invasive plant pests and diseases. We reached critical plant health agreements and resolved plant health barriers to trade, which sustained and expanded U.S. export markets valued at more than $4 billion. And, we helped U.S. producers meet foreign market access requirements and certified the health of more than 650,000 exports, securing economic opportunities for U.S. products abroad. These successes underscore how PPQ is working every day to keep U.S. agriculture healthy and profitable.
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Safeguarding through science: Center for Plant Health Science and Technology 2008 Accomplishments. U.S. Department of Agriculture, Animal and Plant Health Inspection Service, December 2009. http://dx.doi.org/10.32747/2009.7296842.aphis.

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The Center for Plant Health Science and Technology (CPHST) was designed and developed to support the regulatory decisions and operations of the Animal and Plant Health Inspection Service’s (APHIS) Plant Protection and Quarantine (PPQ) program through methods development work, scientific investigation, analyses, and technology—all in an effort to safeguard U.S. agriculture and natural resources. This 2008 CPHST Annual Report is intended to offer an in-depth look at the status of its programs and the progress it has made toward the Center’s long-term strategic goals. One of CPHST’s most significant efforts in 2008 was to initiate efforts to improve the Center’s organizational transparency and overall responsiveness to the needs of its stakeholders. As a result of its focus in this area, CPHST is now developing a new workflow process that allows the customers to easily request and monitor projects and ensures that the highest priority projects are funded for successful delivery. This new system will allow CPHST to more dynamically identify the needs of the agency, more effectively allocate and utilize resources, and provide its customers timely information regarding a project’s status. Thus far, while still very much a work in progress, this new process is proving to be successful, and will continue to advance and expand the service to its customers and staff. The considerable and growing concern of homeland security and the management of critical issues drives CPHST to lead the methods development of science-based systems for prevention, preparedness, response, and recovery. CPHST is recognized nationally and internationally for its leadership in scientific developments to battle plant pests and diseases.
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