Thematische Bibliographien / Insecticidal Activities

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Auswahl der wissenschaftlichen Literatur zum Thema „Insecticidal Activities“

Autor: Grafiati

Veröffentlicht am 18. Mai 2024

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Zeitschriftenartikel zum Thema "Insecticidal Activities"

Yang, Shuai, Hongxiang Peng, Jiahong Tang, Shuting Fan, Chen Zhao, Hanhong Xu und Guangkai Yao. „Discovery of Novel N-Pyridylpyrazole Thiazole Derivatives as Insecticide Leads“. Agronomy 12, Nr. 10 (11.10.2022): 2472. http://dx.doi.org/10.3390/agronomy12102472.

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To develop effective insecticides against Lepidoptera pests, 25 novel N-pyridylpyrazole derivatives containing thiazole moiety were designed and synthesized based on the intermediate derivatization method (IDM). The insecticidal activities of these target compounds against Plutella xylostella (P. xylostella), Spodoptera exigua (S. exigua), and Spodoptera frugiperda (S. frugiperda) were evaluated. Bioassays indicated that compound 7g−7j exhibited good insecticidal activities. Compound 7g showed especially excellent insecticidal activities against P. xylostella, S. exigua, and S. frugiperda with LC50 values of 5.32 mg/L, 6.75 mg/L, and 7.64 mg/L, respectively, which were adequate for that of commercial insecticide indoxacarb. A preliminary structure-activity relationship analysis showed that the insecticidal activities of thiazole amides were better than that of thiazole esters, and the amides with electron-withdrawing groups on the benzene ring were better than the ones with electron-donating groups. This work provides important information for designing novel N-pyridylpyrazole thiazole candidate compounds and suggests that the 7g is a promising insecticide lead for further studies.

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El-Gaby, Mohamed S. A., Moustafa M. S. Bakry, Modather F. Hussein, Faraghally A. Faraghally, Abden M. Khalil, Mohamed A. Gad und Ali M. Drar. „Insecticidal efficacy and structure activity relationship study of some synthesized cyano-benzylidene and bisbenzylidene derivatives against Aphis nerii“. Current Chemistry Letters 12, Nr. 3 (2023): 529–36. http://dx.doi.org/10.5267/j.ccl.2023.3.003.

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In this study, seven cyano-benzylidene and bisbenzylidene derivatives were designed and synthesized. All synthesized compounds were evaluated to determine their insecticidal activities as potential insecticides against nymphs and adults of Aphis nerii. These efforts led to the discovery of compounds 3a-d, 5, 7 and 10 with potent insecticidal activity (LC50 range from 0.0141 to 3.4351ppm). Compound 5 exhibited the highest insecticidal potency with 0.0141ppm. In addition, it indicated that compound 3b is less toxic than benzylidene and other precursors. Therefore, our results suggest that compound 5 has strong potential as a candidate component for developing a novel eco-friendly insecticide for control Aphids.

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Li, Li Xiu, Ling Yan Ge, Ting Xue und Xi Hong Li. „Insecticidal Effects of the Insecticide Based on Porous Starch and Cinnamon Oil against Sitophilus zeamais“. Advanced Materials Research 160-162 (November 2010): 579–84. http://dx.doi.org/10.4028/www.scientific.net/amr.160-162.579.

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We investigated that the bioefficacies of cinnamon oil and insecticide based on the mixture of porous starch and cinnamon oil. They were evaluated for their insecticidal activities and their mortality on adults of Sitophilus zeamais. Fumigant toxicity assayed by hanging in glass jars showed that these chemicals caused significant mortality of the test insect. Cinnamon oil evoked high repellent action and high fumigant toxicity (LD50 = 0.030μL/cm3) against adults of Sitophilus zeamais. The two concentrations of the new insecticide 0.030μL/cm3 (LD50) and 0.040μL/cm3 (the highest) lose their insecticidal activity after a minimum of 144h and 168h, respectively. These results suggest that cinnamon oil starch powder is the most effective insecticide, and could increase its efficacy for use as an alternative to synthetic insecticides.

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Zhang, Jiwen, Zhaonong Hu, Hua Yang und Wenjun Wu. „Synthesis and Insecticidal Activities of New Ether-Derivatives of Celangulin-V“. Natural Product Communications 5, Nr. 6 (Juni 2010): 1934578X1000500. http://dx.doi.org/10.1177/1934578x1000500602.

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In order to find new biorational pesticides, eight new 6-substituted ether derivatives of Celangulin-V were synthesized. The structures were confirmed by IR, 1H NMR and 13C NMR spectroscopic and HRMS analyses. The insecticidal activities of these compounds were tested against third-instar larvae of Mythimna separata. Four derivatives (b, c, f, g) showed higher insecticidal activities than Celangulin-V, with KD50 values of 135.9, 101.33, 169.0 and 219.2 μg.g-1, respectively. However, two compounds (a, d) showed lower insecticidal activities and two (e, h) no activity. The results suggest that C-6 substitutions in these compounds are very important for their insecticidal activities. The insecticidal activities of the derivatives with two or three carbon substitutions at C-6 are higher than that of Celangulin-V showing that this compound has the potential to be a lead structure for semi-synthetic, green insecticides.

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Khandelwal, Sanskrati, Prachi Maheshwari, Vikas Jain und Suresh Chandra Mahajan. „Formulation and Evaluation of Herbal Liquid Insecticide“. Journal of Drug Delivery and Therapeutics 13, Nr. 3 (15.03.2023): 43–46. http://dx.doi.org/10.22270/jddt.v13i3.5755.

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Extensive usage of commercially available synthetic pesticides against phytophagous insects has resulted in their bio-accumulation in the environment, leading to a rise in resistance and a decrease in soil biodiversity over time. In addition, 90% of the sprayed pesticides penetrate the different natural resources via runoff, exposing farmers and consumers of agricultural products to serious health risks. As a result, increasing emphasis has been placed on the creation of environmentally benign pesticides/insecticides that would enable an effective pest management system and minimise chronic exposures that contribute to illnesses. The utilization of the herbal active compounds with insecticidal activities is one such technique. Hence the aim of this study was to develop herbal insecticide formulations from extracts of leaves of Azadirachta Indica, Datura Stramonium, Cascabela Thevetia and seeds of Annona Squamosa. Insecticidal efficacy of developed formulations was tested in-vitro against ballworm larvae. The study unveiled its significance in developing herbal insecticidal formulations as an alternative to harmful synthetic chemical insecticides and a step forward towards development of a promising eco-friendly technology in crop protection. Keywords: Insecticides, Biopesticide, Azadirachta indica, Datura Stramonium, Annona Squamosa, Cascabela Thevetia.

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Li, L., X. Song, Z. Yin, R. Jia und Y. Zou. „Insecticidal activities and mechanism of extracts from neem leaves against Oxya chinensis“. Arquivo Brasileiro de Medicina Veterinária e Zootecnia 71, Nr. 1 (Februar 2019): 1–10. http://dx.doi.org/10.1590/1678-4162-8958.

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ABSTRACT In this study, neem leaves were successively extracted with petroleum ether, 95% ethanol and water and the insecticidal activities of these extracts against Oxya chinensis larvae were measured. The results showed that 95% ethanol extract gave the highest extraction yield and insecticidal activity, and it was further extracted with five different solvents. The petroleum ether extract from the 95% ethanol extract possessed the highest insecticidal activity with median lethal concentration values ranging from 14.93 to 55.66mg/mL. The gas chromatography-mass spectrometer analysis showed that the petroleum ether extract mainly composed of alkanes, olefin, esters and amide. The pathological examination revealed that the prominent lesions, including reduced regenerative cells in midgut and swelled and degenerated cylindrical cells, were observed in the 5th instar Oxya chinensis after treatment. The ultrastructural features showed that the cylindrical cells, microvilli and mitochondria were seriously damaged. These results suggested that the petroleum ether extract from neem leaves had potent insecticidal activity and could be a candidate insecticide.

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Zhang, Jiwen, Lihui Cui, Longbo Li, Zhan Hu, Qianliang Zhang, Zhaonong Hu und Wenjun Wu. „Synthesis and Insecticidal Activities of Novel Nitrogenous Derivatives of Celangulin-V“. Natural Product Communications 9, Nr. 6 (Juni 2014): 1934578X1400900. http://dx.doi.org/10.1177/1934578x1400900603.

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In order to develop new biorational pesticides and clarify the potential structural factors needed for the biological activity of celangulin-V analogues, thirty novel nitrogenous derivatives were designed and synthesized. The single crystal structure of celangulin-V is reported for the first time and provides a more accurate structure than that previously reported. The structures of all the new derivatives were confirmed by either NMR or ESI-MSn analysis. Insecticidal activities of these compounds were tested against the third-instar larvae of Mythimna separata. One derivative (1–6) showed higher insecticidal activity than celangulin-V, with a KD50 of 231.2 μg.g–1, while two compounds (2–13 and 2–14) exhibited lower insecticidal activities; the others revealed no activity at a concentration of 20 mg mL−1. The results support the view that celangulin-V has the potential to be a lead structure of semi-synthetic green insecticides.

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Wang, Wenda, Haihuan Su, Huangyong Li und Xiufang Cao. „Tetrafluorobenzyl Alcohol-Oriented Novel (S)-Enantiomeric Esters: Synthesis and Structure-Activity Relationship“. Current Bioactive Compounds 15, Nr. 1 (06.02.2019): 98–102. http://dx.doi.org/10.2174/1573407213666170221160947.

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Background: Using constantly and widely chemistry insecticides has resulted in a selection burden and favored tolerance development in various insect species. Particularly, pyrethroids are the only one which can be used for net impregnation either ITNs or LLIN as yet, however, the excessive use of pyrethroids has led to many cases of insect resistance in worldwide. Therefore, it is urgent to develop novel insecticides fighting against this sort of resistance. Methods: Based on the preliminary studies, we explored a straightforward highly stereoselective method to achieve the novel chiral ester derivatives by using Oppolzer’s 10,2-camphorsultam as chiral controlling reagent. Results: A series of tetrafluorobenzyl alcohol oriented (S)-enantiomeric esters were designed and synthesized by the asymmetric synthesis. All the compounds exhibited moderate yields, and the original synthesized compounds have been evaluated for their potential insecticidal activity against Plutella xylostella compared with those of fenvalerate and D-trans-phenothrin, and some compounds presented excellent insecticidal activities. Conclusion: The bioassay illustrated that some of the compounds exhibit obviously insecticidal activities against Plutella xylostella, especially, the insecticidal activity of compound 5i was as good as commercial fenvalerate and D-trans-phenothrin, which can be used as a lead compound for further optimization.

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Zhang, Jiwen, Zhan Hu, Shengkun Li, Shuding Yang und Wenjun Wu. „Synthesis and Insecticidal Activities of Novel Derivatives of 1β,4α,6α,9α-Tetrahydroxy-2β,12-epoxymethano-β-dihydroagarofuran“. Natural Product Communications 8, Nr. 6 (Juni 2013): 1934578X1300800. http://dx.doi.org/10.1177/1934578x1300800617.

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In order to develop novel biorational pesticides, twelve new ether derivatives of 1β,4α,6α,9α-tetrahydroxy-2β,12-epoxymethano-β-dihydroagarofuran (3) were synthesized. The structure of the important intermediate 3 was confirmed by X-ray crystallography, and the new derivatives (3.1–3.12) were elucidated by IR, 1H NMR, 13 C NMR and 2D NMR spectroscopic and ESI-MS analysis. Insecticidal activities of these derivatives were tested against the third-instar larvae of Mythimna separata. Though most of the derivatives (3.1–3.4, 3.6, 3.8, 3.9–3.12) revealed no obvious activities at the concentration of 10 mg/mL –1, two compounds 3.5 and 3.7, with KD50 values of 12.9 (μg/g-1 and 7.8 μg/g –1, respectively, showed much higher insecticidal activities than celangulin-V, with a KD50 of 321.4 μg·g–1, the main insecticidal component from the root bark of Chinese bittersweet, Celastrus angulatus Max. The results showed that β-dihydroagarofuran has the potential to be a lead structure for semi-synthetic green insecticides.

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D Incao, Marianna P., Neiva Knaak und Lidia M. Fiuza. „PHYTOCHEMICALS TAKEN FROM PLANTS WITH POTENTIAL IN MANAGEMENT OF SPODOPTERA FRUGIPERDA (LEPIDOPTERA: NOCTUIDAE)“. Journal of Biopesticides 06, Nr. 02 (01.12.2013): 182–92. http://dx.doi.org/10.57182/jbiopestic.6.2.182-192.

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ABSTRACT In agriculture, there is a constant search for natural products with biological activities that minimize the environmental impact of various pesticides used such as insecticides. The chemical constituents present in plants have these activities and show promise in fighting pests in agriculture. An approach to the selection of new insecticides that fulfill the requirements of safety, efficacy and selectivity, can be through the study of defense mechanisms of plants. Recent studies have shown the potential insecticide substances and extracts isolated from plants against various insect pests that cause serious damage to crops or stored grain. These active ingredients are distributed by different plant organs and involved in secondary metabolism, are divided into three major groups: terpenes, phenols and nitrogenous compounds. Thus, this review aims to give an overview of the active ingredients obtained from plant extracts with potential insecticidal to Spodoptera frugiperda J.E. Smith (Lepidoptera: Noctuidae).

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Dissertationen zum Thema "Insecticidal Activities"

Alfaro, Inocente Edna Ariel. „Insecticidal and antifeedant activities of Malagasy medicinal plant (Cinnamosma sp.) extracts and drimane-type sesquiterpenes against Aedes aegypti mosquitoes“. The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1586449408494604.

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Dorla, Emmanuelle. „Étude phytochimique et propriétés bioactives de Peperomia borbonensis (Miq.) Piperaceae“. Thesis, La Réunion, 2016. http://www.theses.fr/2016LARE0027.

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Les maladies impliquant des micro-organismes représentent un problème majeur de santé publique en raison du fort taux de mortalité provoqué par l'accroissement et l'émergence de souches résistantes. De même, les régions tropicales du Monde et La Réunion doivent faire face depuis plusieurs années à la pression accrue d'arthropodes ravageurs de cultures et vecteurs de maladies. Pour lutter contre ces arthropodes, les pesticides synthétiques aux conséquences désastreuses sur l'Homme et l'environnement sont principalement utilisés. Depuis quelques années, on observe un phénomène grandissant de résistance aux molécules conventionnelles à la fois chez les micro-organismes et les arthropodes. Face à ce constat, il est primordial de proposer de nouvelles molécules bioactives capables de lutter efficacement contre les ravageurs et les micro-organismes. Dans ce cadre, un criblage préliminaire réalisé sur vingt plantes endémiques et indigènes de La Réunion a permis de mettre en évidence l'activité antibactérienne et acaricide des extraits acétate d'éthyle de plusieurs espèces végétales. En raison de son large spectre d'activités biologiques, Peperomia borbonensis Miq. (Piperaceae), a été sélectionnée pour une investigation chimique et biologique approfondie. La suite de nos travaux a été consacrée à l'isolement et la caractérisation des métabolites secondaires de l'extrait apolaire de cette espèce. Les fractionnements bio-guidés réalisés ont conduit à l'isolement de quatorze molécules dont un amide à la structure nouvelle. Par ailleurs, l'étude de la fraction volatile de cette espèce a montré le potentiel insecticide de l'huile essentielle des feuilles pour lutter contre la mouche du melon B. cucurbitae
The emergence of resistant strains in infectious diseases is a major public health issue. Similarly, arthropods which caused important economic damages in tropical and subtropical areas are continuously developing resistance to chemicals. To counteract this situation, it is essential to find new bioactive molecules able to fight pests and micro-organisms. In this context a preliminary screening was performed on twenty endemic plants and native of Reunion. Twenty-six ethyl acetate extracts were tested for their antibacterial and acaricidal activities. Considering its broad spectrum of activity, Peperomia borbonensis Miq. (Piperaceae), was selected for further chemical and biological investigations. Two bio-guided fractionations were performed on its apolar extract and let to the isolation of fourteen molecules. Moreover, the study of the volatile fraction has shown the insecticidal potential of the leaf essential oil of P. borbonensis against the melon fly B. cucurbitae

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Basukriadi, Adi. „Biological activities of seed of the yam bean, Pachyrrhizue erosus (L.) urban, on the diamondback moth, Plutella xylostella (L.)“. Thesis, University of Newcastle Upon Tyne, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.238821.

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Davis, Kimberly Ann. „An investigation of paraoxonase-1 (PON1₁₉₂ ) activities in the serum of southerners as related to gender and race“. Master's thesis, Mississippi State : Mississippi State University, 2008. http://library.msstate.edu/etd/show.asp?etd=etd-04042008-151226.

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Merelli, Bérangère. „Proinsecticides chiraux d'acides carboxyliques et de β-ethanolamines : effet de la chiralité sur la métabolisation et les activités biologiques chez l'insecte“. Versailles-St Quentin en Yvelines, 2004. http://www.theses.fr/2004VERS0005.

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Les D2-thiazolines et les N-acylaziridines sont étudiées comme structures de proinsecticides d'acides carboxyliques fluorés ou non. Les D2-thiazolines ont été obtenues sous forme de racémiques et d'énantiomères purs par une méthode de thionation/cyclisation en utilisant le réactif de Lawesson. Les N-acylaziridines ont été synthétisées en condensant un acide carboxylique sur une aziridine obtenue sous forme racémique et énantiomériquement pure à partir d'oxiranes. Des méthodes d'analyse chirale de RMN et HPLC ont été mises au point sur les différents substrats synthétisés pour contrôler la pureté énantiomérique et pour évaluer la composition d'extraits de milieux biologiques d'insectes incubés par des racémiques de N-acylaziridines suite à une hydrolyse enzymatique incomplète. Les propriétés biologiques des D2-thiazolines et des N-acylaziridines ont été évaluées au cours de tests effectués sur Drosophile, Puceron ou Acarien. La métabolisation des molécules les plus intéressantes a été étudiée en présence de milieu biologique d'insecte (tissus de criquet ou de chenille ou a-chymotrypsine), sans prétraitement de l'échantillon, par RMN 19F ou par HPLC avec injection directe sur des colonnes large pore et des colonnes monolithiques. En présence de ces milieux biologiques, les N-acylaziridines étudiées se comportent effectivement comme des proinsecticides d'acides carboxyliques puisqu'elles le démasquent efficacement. Les D2-thiazolines se révèlent plus stables puisqu'elles nécessitent l'utilisation de milieux biologiques concentrés pour libérer une faible quantité d'acide carboxylique
The nitrogen heterocylces D2-thiazoline and N-acylaziridine were studied as potential proinsecticides masking the active principles : fluorinated or not carboxylic acids. The synthesis of D2-thiazolines, either as racemates or as pure enantiomers, were performed by thionation/cyclisation using Lawesson reagent. The synthesis of N-acylaziridines were performed by condensation of carboxylic acid with amine obtained as racemate and as pure enantiomer using oxiranes. We developped analytical chiral methods of NMR and HPLC to verify optical purity of different substrates. Then, these methods were applied to extracts of incubated insect tissues by N-acylaziridines racemates after a partial unmasking for the determination of the enantiomeric composition. The biological properties of these potentials proinsecticides were evaluated by several testings performed with various pests : Drosophila melanogaster, Aphis gossypii, Myzus persicae, Tetranychus urticae. The metabolization of the most interesting molecules was studied in insect biological media (tissues of locusts or caterpillars or with a-chymotrypsin), without any pretreatment, using analytical methods such as 19F[1H]NMR or HPLC allowing the direct injection on particular packing material such as wide pore particles or monolithic column. In these biological media, N-acylaziridines beleave effectively as proinsecticides of the carboxylic acid, since the unmasking is very efficient. D2-thiazolines are more stable since it's necessary to use concentred biological media for unmasking a little of active principle

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Saad, Mohamed. „Synthèse et étude structurale de N-méthylcarbamates d'oxime. Relations structure-activités anticholinestérasique et insecticide“. Toulouse, INPT, 1992. http://www.theses.fr/1992INPT061G.

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Une serie de 40 n-methylcarbamates d'oxime r1r2 c=n-o-c(=o)-nh-ch3 a ete synthetisee, leur configuration (e ou z) a ete caracterisee par differentes techniques spectrales (ir, rmn, uv). Leur activite insecticide potentielle a ete evaluee et comparee a des derives commercialises par des tests biologiques in vitro et in vivo. L'etude de l'inhibition de l'acetylcholinesterase montre que ces derives sont des inhibiteurs competitifs de cette enzyme. Pour les differentes sources d'ache utilisees (erythrocyte bovin, drosophile, punaise), les derives des trifluoromethylphenylcetoximes ainsi que ceux des oximinonitriles d'alkyle se sont reveles aussi efficaces que les carbamates d'oxime de reference. In vivo, sur quatre especes d'arthropodes (d. Melanogaster, d. Fasciatus, s. Granarius, t. Urticae), ces memes derives ont presente une bonne activite letale. L'etude des relations structure-activite anticholinesterasique souligne l'importance des interactions electroniques au niveau du site actif de l'ache et montre le role determinant du groupe r2, cis par rapport a la partie carbamique, dans la fixation du carbamate sur le sous site trimethyle de l'ache. In vivo, chaque espece traitee met en jeu des parametres structuraux differents traduisant la variabilite des processus biologiques. Cette etude montre une analogie d'action entre les n-methylcarbamates d'oxime avec les n-methylcarbamates de phenyle pour les activites anticholinestasiques

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Triguéros, Véronique. „Les Lectines fongiques : purification et détermination de leurs activités insecticides, clonage et expression de la lectine toxique de Xerocomus Chrysenteron“. Toulouse 3, 2000. http://www.theses.fr/2000TOU30215.

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Sylvestre, Muriel. „Contribution a l'étude des constituants chimiques de Licaria salicifolia (Sw. ) Kosterm (lauracées) et de leurs activités insecticides“. Toulouse 3, 2000. http://www.theses.fr/2000TOU30183.

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Staffa, Pumla. „Anti-tick activities of extracts of Tulbaghia violacea (Alliaceae) cultivated in hydroponic media amended with entomopathogenic fungi (Hypocreales)“. Thesis, Cape Peninsula University of Technology, 2018. http://hdl.handle.net/20.500.11838/2830.

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Thesis (MTech (Horticulture))--Cape Peninsula University of Technology, 2018.
Ticks and tick-borne diseases are important limiting factors to the attainment of sustainable animal and human health, affecting livelihood of resource poor farming communities in developing countries. Rhipicephalus appendiculatus and Amblyomma variegatum (Ixodidae) are among the most troubling tick species in Africa. While ticks can be controlled by applying chemical acaricides, these chemicals are quite expensive, especially, for small-scale famers in developing countries. Hence, the quest for alternative tick control over the years have revealed that entomopathogenic fungi (EPF) and plant extracts have huge prospects as sustainable alternatives for tick control. Beauveria bassiana (Hypocreales) is a fungal entomopathogen with the ability to colonize plants endophytically and induce secondary metabolite production in plants, and it has been found to be a potential biological control agent against a wide range of arthropods. Several plant species including plant species belonging to the family Alliaceae possess anti-tick activities (repellent and toxic); therefore, integrating the two strategies by inoculating Tulbaghia violacea with B. bassiana could enhance secondary metabolite contents in extracts obtained from the plant and increase medicinal materials. The primary purpose of the present study was to evaluate the effect of indigenous endophytic entomopathogens inoculation of T. violacea on the plant growth, tissue nutrient contents and secondary metabolites, and anti-tick activities of extracts of T. violacea. The specific objectives were: (i) to carry out a study on the effects of inoculating T. violacea with fungal strains of B. bassiana and Clonostachys rosea on plant growth and tissue nutrient contents in extracts of T. violacea with the view of selecting one of the two fungi for further investigation (ii) to compare secondary metabolite profiles of extracts obtained from plants exposed to fungus (EPF) inoculum and control treatment during cultivation, and (iii) to determine whether exposure of T. violacea to an endophytic fungus (B. bassiana) during cultivation affects the repellent and acaricidal activities of extracts of T. violacea on A. variegatum and R. appendiculatus. The study had two experiments, presented in chapters two and three. In the first experiment, eight weeks old potted seedlings of T. violacea were inoculated separately with B. bassiana (strain SM3) and C. rosea (strain SM8) conidia suspended at concentrations of 1 x 106 conidia mL-1. Plant growth parameters, such as number of leaves, plant height (aerial part), fresh weights of aerial parts, and tissue nutrient contents were assessed. Results indicated that B. bassiana induced higher growth of plants than C. rosea. Inoculation with B. bassiana did not significantly (P ˃ 0.05) influence most of the growth parameters, number of leaves, fresht weight of roots and of fresh weight aerial parts (leaves) of T. violacea assessed in the current study. However, mean plant heights and root lengths were significantly (P < 0.05) higher in favour of B. bassiana treated plants compared to those in C. rosea. Fe contents in the roots (1416.3 ± 305.10 mg/kg) were found to be positively influenced (P < 0.05) by the fungal inoculation. There was a significant difference in roots (P < 0.05) on the uptake of Mn in C. rosea treated plants (243 ± 19 mg/kg) compared to the control group (169 ± 16.37 mg/kg) and B. bassiana treated roots (161.3 ± 14.44 mg/kg). Macro nutrients up take did not differ significantly among treatments on both leaves and roots (P > 0.05).

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Noudogbessi, Jean Pierre Akodogbo. „Etudes chimiques et activités biologiques d'extraits de végétaux aromatiques d'origine béninoise“. Clermont-Ferrand 2, 2009. http://www.theses.fr/2009CLF21948.

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Ce travail rend compte des études chimiques et biologiques d'extraits volatils et non volatils de plantes aromatiques acclimatées au Bénin. La première partie passe en revue quelques généralités sur les huiles essentielles, les métabolites secondaires et les méthodes d'analyse chromatographique. Dans cette partie, quelques caractéristiques générales ont été décrites sur Candida albicans , le cancer et sur les déprédateurs respectifs du maïs et du niébé que sont le Prostephanus truncatus et Callosobruchus maculatus. La deuxième partie donne les résultats de l'analyse chimique des constituants volatils extraits de 20 espèces aromatiques appartenant à 10 familles botaniques collectées dans différentes régions du Bénin : les Anacardiaceae, Annonaceae, Asteraceae, Clusiaceae, Lamiaceae, Leguminosae-Papilionoideae, Myrtaceae, Poaceae, Verbenaceae et les Zingiberaceae. On trouve sur l'ensemble des échantillons investigués, les différentes structures rencontrées dans les huiles essentielles : terpènes, dérivés aromatiques et constituants aliphatiques. Une 3e partie décrit les résultats phytochimiques qui mettent en exergue les métabolites souvent rencontrées dans le règne végétal : les tanins, les alcaloïdes, les flavonoïdes, les stérols et triterpènes, etc. . La 4e partie discute des résultats d'études biologiques. Différentes réactions liées au profil chimique de chacune des huiles essentielles testées ont été observées au cours de ces études biologiques. Les huiles essentielles d'Aeollanthus pubescens, de Xylopia aethiopica et de Cymbopogon giganteus ont été actives sur Candida albicans. Par ailleurs, l'activité d'autres huiles essentielles évaluées sur la cellule cancéreuse mammaire MCF-7 a révélé un potentiel anticancéreux des extraits volatils de Pentadesma butyracea, Siphonochilus aethiopicus, Xylopia aethiopica et de Ozoroa insignis. Dans le domaine de la protection des récoltes, les résultats de nos travaux ont montré respectivement les caractères insecticide, larvicide et ovicide des huiles essentielles de Pimenta racemosa, Chromolaena odorata, Lantana camara et du Psidium guajava sur Prostephanus truncatus d'une part puis des huiles essentielles de Cymbopogon giganteus et de Xylopia aethiopica sur Callosobruchus maculatus d'autre part. L'ensemble des résultats, tant sur le plan chimique que biologique met en évidence les potentialités de certaines espèces, pour une exploitation de leur extrait volatil à des fins thérapeutiques et dans la lutte post-récolte

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Buchteile zum Thema "Insecticidal Activities"

Eto, Morifusa. „Biochemical Mechanisms of Insecticidal Activities“. In Chemistry of Plant Protection, 65–107. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-46674-8_2.

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Escoubas, Pierre, Labunmi Lajide und Junya Mizutani. „Insecticidal and Antifeedant Activities of Plant Compounds“. In Natural and Engineered Pest Management Agents, 162–71. Washington, DC: American Chemical Society, 1993. http://dx.doi.org/10.1021/bk-1994-0551.ch011.

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Vargas, Lúcia Rosane Bertholdo, und Célia Regina Carlini. „Insecticidal and Antifungal Activities of Ribosome-inactivating Proteins“. In Ribosome-inactivating Proteins, 212–22. Oxford: John Wiley & Sons, Ltd., 2014. http://dx.doi.org/10.1002/9781118847237.ch14.

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Kumar, Devendra, Anuj Ranjan, Abhishek Chauhan, Dhan Prakash und Tanu Jindal. „Insecticidal Activities of Different Extracts of Calotropis procera“. In New Frontiers in Environmental Toxicology, 91–102. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-72173-2_7.

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Saranya, Sivakumar, Adikesavan Selvi, Ranganathan Babujanarthanam, Aruliah Rajasekar und Jagannathan Madhavan. „Insecticidal Activity of Nanoparticles and Mechanism of Action“. In Model Organisms to Study Biological Activities and Toxicity of Nanoparticles, 243–66. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-1702-0_12.

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Clark, J. Marshall. „Action of Pyrethroids on Ca2+-Stimulated ATP Hydrolyzing Activities: Protein Phosphorylation-Dephosphorylation Events in Insect Brain Fractions“. In Membrane Receptors and Enzymes as Targets of Insecticidal Action, 189–211. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4684-5113-9_10.

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Khan, Shamshad A., Priyanka Verma, Varsha A. Parasharami und Laiq Ur Rahman. „In Vitro Manipulations for Value Addition in Potent Herbal Insecticidal Activities of Chrysanthemum cinerariaefolium“. In Biotechnological Approaches for Medicinal and Aromatic Plants, 395–416. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0535-1_18.

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Yang, Minli, Rui Liang und Fengxia Hao. „Insecticidal, Antifeedant and Growth-Inhibition Activities of Different Extracts from Pedicularis Spicata against Plutella Xylostella“. In Advances in Intelligent and Soft Computing, 425–31. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-27537-1_52.

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Reyes-Montaño, Edgar Antonio, und Nohora Angélica Vega-Castro. „Plant Lectins with Insecticidal and Insectistatic Activities“. In Insecticides - Agriculture and Toxicology. InTech, 2018. http://dx.doi.org/10.5772/intechopen.74962.

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Khanikor, Bulbuli, Kamal Adhikari und Bikash Rabha. „Citrus Essential Oils: A Suite of Insecticidal Compounds“. In Citrus [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.95887.

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Citrus essential oils (CEOs) and their constituent compounds are being reported to have multifarious activities. In this chapter an attempt is made to discuss the insecticidal activities, as well as CEO profile of different vegetative part of Citrus species and biocidal potentiality of their constituent compounds against diverse insect pests. It is observed that in most of the CEO constituent profile, limonene is the major constituent compound. Other important constituents present in different percentages in different CEOs are β-citronellal, linalool, pinene, β- caryophyllene, β-myrcene, terpinene, citral etc. These plant EO constituents are reported to have insecticidal effects against diverse insect species. Taking the four peel EOs of Citrus limon, Citrus paradisi, Citrus medica, Citrus maxima commonly grown in North Eastern part of India, study on their insecticidal effects against Dolichoderus affinis (Hymenoptera: Formicidae) was made and result is presented showing higher fumigant toxicity of C. medica and C. limon oil against the ant sp. With the increasing awareness for using safe insecticidal products among consumers, the citrus EOs with their attracting terpene compounds having good insecticidal potency bear all attributes to be used as commercial green pesticides in coming days both in indoor and outdoor management of insect pests.

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Konferenzberichte zum Thema "Insecticidal Activities"

Oyerinde, Raliat Motunrayo. „Insecticidal activities ofBeauveria bassianaandMetarhiziumspp.against larval and adult housefly,Musca domesticaL.“ In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.115550.

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Pyrko, A. N. „ENVIRONMENTALLY FRIENDLY SYNTHESIS AND BIOLOGICAL TESTING FOR PESTICIDAL ACTIVITY OF HETEROCYCLIC ANALOGS OF STEROIDS“. In SAKHAROV READINGS 2022: ENVIRONMENTAL PROBLEMS OF THE XXI CENTURY. International Sakharov Environmental Institute of Belarusian State University, 2022. http://dx.doi.org/10.46646/sakh-2022-1-187-190.

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The aim of the study is the synthesis and testing for pesticidal activities of 2,3-dimethoxy-16,16-dimethyl-D-homo-8-azagona-1,3,5 (10),13-tetraene-12,17а-one and 2,3-dimethoxy-16,16-dimethyl-d-homo-8-azagona-1,3,5(10),13-tetraene-12-imino-17а-one hydrochloride which could become the basis of plant protection products. The first compound was obtained by condensation of 6,7-dimethoxy-2,3-dihydroisoquinoline with 2-acetyl-5.5-dimethylcyclohexane-1,3-dione. The second substance was synthesized by interaction of the first with ammonium chloride. The synthesized compounds were tested for certain types of pesticide activities. Both synthesized compounds showed herbicidal activity against amaranthus retroflexus, brassica rapa, abutilon theophrasti and insecticidal activity against toxoptera graminum. Hydrochloride 2,3-dimethoxy-16,16-dimethyl-D-homo-8-azagon-1,3,5(10),13-tetraene-12-imino-17a-one showed insecticidal activity against musca domestica and fungicidal activity against drechslera.

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Nawaz, Memoona. „Insecticidal Activities of Solanum nigrum L. Extract Against Pest Infestation of Momardica charantia L“. In IBRAS 2021 INTERNATIONAL CONFERENCE ON BIOLOGICAL RESEARCH AND APPLIED SCIENCE. Juw, 2021. http://dx.doi.org/10.37962/ibras/2021/123-124.

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Hozzein, Wael. „INSECTICIDAL ACTIVITIES OF NEWLY ISOLATED ACTINOMYCETES AGAINST THE RIFT VALLEY FEVER MOSQUITO AEDES AEGYPTII“. In 29th International Academic Conference, Rome. International Institute of Social and Economic Sciences, 2017. http://dx.doi.org/10.20472/iac.2017.029.013.

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Berechet, Mariana Daniela, Demetra Simion, Maria Stanca, Cosmin Andrei Alexe, Rodica Roxana Constantinescu, Maria Rapa und Andreea Turcanu. „Antibacterial and antioxidant activities of lemon balm (Melissa officinalis L.) essential oil“. In The 8th International Conference on Advanced Materials and Systems. INCDTP - Leather and Footwear Research Institute (ICPI), Bucharest, Romania, 2020. http://dx.doi.org/10.24264/icams-2020.ii.2.

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Lemon balm (Melissa officinalis L.) belongs to the Lamiaceae family. Essential oil extracted from the aerial parts of lemon balm has been investigated for the protection of fruits during storage, as insecticidal, as well as in medicine, due to its bioactive properties. In this paper, the composition and identification of components from Melissa officinalis L. essential oil were determined by gas chromatography coupled with mass spectrophotometry (GC/MS) analysis. Total phenol content (TPC) and the scavenging activity towards 2,2-diphenyl-1-picrylhydrazyl (DPPH·) and 2,2′-azino-bis (3-ethylbenzthiazoline)-6-sulfonic acid (ABTS+·) free radicals were evaluated by UV-VIS spectrometry. Antibacterial activities were carried out against Staphylococcus aureus, Escherichia coli and Klebsiella pneumoniae. Seventeen bioactive compounds were found as constituents of Melissa officinalis L. essential oil, among which o-cymene (19.735%), dehydro-p-cymene (17.180%), and limonene (11.589%) were found as the major components. Attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FT-IR) provided a confirmation for the chemical components of lemon balm essential oil identified by GC/MS. The values recorded for TPC and antioxidant activity were as follows: 54.72 mg GAE/g dry substance, 28.53% for DPPH, and 46.17% for ABTS assays, respectively. 100 µL lemon balm essential oil proved total antibacterial activity against the tested microorganisms. The results showed that the Melissa officinalis L. may be a good candidate as plant-derived antioxidant and antibacterial agent for medical footwear, wound dressings and other medical applications.

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Faiz, Yusra. „Comparative Study Of Insecticidal Activities By Formulated Fish Emulsified Bio-Fertilizer On The Growth And Productivity Of SolanumLycopersicum L. (Tomato)“. In International Conference on Biological Research and Applied Science. Jinnah University for Women, Karachi,Pakistan, 2022. http://dx.doi.org/10.37962/ibras/2022/175-177.

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ČESONIENĖ, Laima, Kristina LINGYTĖ, Daiva ŠILEIKIENĖ und Midona DAPKIENĖ. „GROUNDWATER QUALITY DYNAMICS IN THE TERRITORY OF FORMER PESTICIDE WAREHOUSE“. In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.097.

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Pesticides are used in intensive farming to help fight plant pests and diseases (insecticides, fungicides), kill weeds (herbicides), as well as accelerate the growth of seeds (defoliants), but until 1992 pesticides were kept in improperly equipped warehouses, there was no maintenance or accounting of the pesticides. Consequently, the environment of the warehouse was often polluted. Such sources of pollution are hazardous to the environment. Economic activities in the area have been carried out from 1980 to 1994. Various agricultural chemicals have been stored and used there. Later, in 1997, chemicals (fertilizers and plant protection chemicals) stored in the territory of the warehouse have been collected and removed from the territory. During the inventory of 2009, no chemical substances were found in the territory. In 2010, an investigation carried out in the territory of the pesticide warehouse revealed unacceptable levels of pollution in the soil and the groundwater by pesticides and other toxic and neutral chemicals. In 2012, the polluted territory was cleaned eliminating the remains of buildings, and removing the soil polluted by the pesticides. The aim of the study was to evaluate the impact of the territory of the former pesticide warehouse in Kaunas District Municipality, Bubių Village on the groundwater during the period from 2012 to 2016. The results have shown that the groundwater is mostly polluted with nitrogen compounds, as well as the tendency in increase of chlorides, sodium, and calcium. Minimum and unchanging concentrations of the pesticides (DDD, DDE, DDT) were determined throughout the investigation.

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Berichte der Organisationen zum Thema "Insecticidal Activities"

Altstein, Miriam, und Ronald Nachman. Rationally designed insect neuropeptide agonists and antagonists: application for the characterization of the pyrokinin/Pban mechanisms of action in insects. United States Department of Agriculture, Oktober 2006. http://dx.doi.org/10.32747/2006.7587235.bard.

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The general objective of this BARD project focused on rationally designed insect neuropeptide (NP) agonists and antagonists, their application for the characterization of the mechanisms of action of the pyrokinin/PBAN (PK-PBAN) family and the development of biostable, bioavailable versions that can provide the basis for development of novel, environmentally-friendly pest insect control agents. The specific objectives of the study, as originally proposed, were to: (i) Test stimulatory potencies of rationally designed backbone cyclic (BBC) peptides on pheromonotropic, melanotropic, myotropic and pupariation activities; (ii) Test the inhibitory potencies of the BBC compounds on the above activities evoked either by synthetic peptides (PBAN, LPK, myotropin and pheromonotropin) or by the natural endogenous mechanism; (iii) Determine the bioavailability of the most potent BBC compounds that will be found in (ii); (iv) Design, synthesize and examine novel PK/PBAN analogs with enhanced bioavailability and receptor binding; (v) Design and synthesize ‘magic bullet’ analogs and examine their ability to selectively kill cells expressing the PK/PBAN receptor. To achieve these goals the agonistic and antagonistic activities/properties of rationally designed linear and BBC neuropeptide (NP) were thoroughly studied and the information obtained was further used for the design and synthesis of improved compounds toward the design of an insecticide prototype. The study revealed important information on the structure activity relationship (SAR) of agonistic/antagonistic peptides, including definitive identification of the orientation of the Pro residue as trans for agonist activity in 4 PK/PBANbioassays (pheromonotropic, pupariation, melanotropic, & hindgut contractile) and a PK-related CAP₂b bioassay (diuretic); indications that led to the identification of a novel scaffold to develop biostbiostable, bioavailable peptidomimetic PK/PBANagonists/antagonists. The work led to the development of an arsenal of PK/PBAN antagonists with a variety of selectivity profiles; whether between different PKbioassays, or within the same bioassay between different natural elicitors. Examples include selective and non-selective BBC and novel amphiphilic PK pheromonotropic and melanotropic antagonists some of which are capable of penetrating the moth cuticle in efficacious quantities. One of the latter analog group demonstrated unprecedented versatility in its ability to antagonize a broad spectrum of pheromonotropic elicitors. A novel, transPro mimetic motif was proposed & used to develop a strong, selective PK agonist of the melanotropic bioassay in moths. The first antagonist (pure) of PK-related CAP₂b diuresis in flies was developed using a cisPro mimetic motif; an indication that while a transPro orientation is associated with receptor agonism, a cisPro orientation is linked with an antagonist interaction. A novel, biostablePK analog, incorporating β-amino acids at key peptidase-susceptible sites, exhibited in vivo pheromonotropic activity that by far exceeded that of PBAN when applied topically. Direct analysis of neural tissue by state-of-the-art MALDI-TOF/TOF mass spectrometry was used to identify specific PK/PK-related peptides native to eight arthropod pest species [house (M. domestica), stable (S. calcitrans), horn (H. irritans) & flesh (N. bullata) flies; Southern cattle fever tick (B. microplus), European tick (I. ricinus), yellow fever mosquito (A. aegypti), & Southern Green Stink Bug (N. viridula)]; including the unprecedented identification of mass-identical Leu/Ile residues and the first identification of NPs from a tick or the CNS of Hemiptera. Evidence was obtained for the selection of Neb-PK-2 as the primary pupariation factor of the flesh fly (N. bullata) among native PK/PK-related candidates. The peptidomic techniques were also used to map the location of PK/PK-related NP in the nervous system of the model fly D. melanogaster. Knowledge of specific PK sequences can aid in the future design of species specific (or non-specific) NP agonists/antagonists. In addition, the study led to the first cloning of a PK/PBAN receptor from insect larvae (S. littoralis), providing the basis for SAR analysis for the future design of 2ⁿᵈgeneration selective and/or nonselective agonists/antagonists. Development of a microplate ligand binding assay using the PK/PBAN pheromone gland receptor was also carried out. The assay will enable screening, including high throughput, of various libraries (chemical, molecular & natural product) for the discovery of receptor specific agonists/antagonists. In summary, the body of work achieves several key milestones and brings us significantly closer to the development of novel, environmentally friendly pest insect management agents based on insect PK/PBANNPs capable of disrupting critical NP-regulated functions.

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