Interactive Effects of an Antifeedant Used with Bacillus thuringiensis var. san diego Delta Endotoxin on Colorado Potato Beetle (Coleoptera: Chrysomelidae

Murray, Kathleen D.; Alford, A. R.; Groden, Eleanor; Drummond, F. A.; Storch, R. H.; Bentley, Michael D.; Sugathapala, Priyantha M.

doi:10.1093/jee/86.6.1793

Cited by 24 publications

(25 citation statements)

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“…This exposes them more to the synthetic pesticide, and that this effect does not occur in treatments without the neem component. In general, botanicals often act as stress factors, increasing the vulnerability of pest insects to other sources of mortality (Murray et al, 1993;Trisiyono and Whalon, 1999). All the pesticides used, except neem, had a toxic effect on the predators (Table 4).…”

Section: Discussionmentioning

confidence: 99%

Participatory evaluation of synthetic and botanical pesticide mixtures for cotton bollworm control

Sinzogan

Kossou

Atachi

et al. 2006

JTI

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Abstract. The bioefficacy of various plant extracts, namely Azadirachta indica A. Juss, Khaya senegalensis Desrousseaux (A. Jussieu) and Hyptis suavuolens (L.) Poit, either alone or in combination with half the recommended dose of synthetic pesticides, was studied with farmers to find a more sustainable strategy for the management of bollworms in cotton. A number of treatments were farmer innovations. The treatments were compared six times during the season to the application of the fully recommended dose of synthetic pesticides and to a control with no pesticide application. Applications of either the fully recommended dose of the synthetic pesticides or the combinations with a neem seed extract (6 kg/ha) were most effective in reducing bollworm incidence and damage. Both the treatments gave the highest yields of cottonseed, the latter being the most costeffective. All the pesticides used, except neem alone, had a toxic effect on bollworm predators. This study has increased farmers' confidence in endogenous technology. The researcher's interaction among the local learning group members, who conducted the experiments, facilitated the introduction of a cost-effective alternative to the standard fulldose synthetic pesticide recommendation.Key words: cotton, plant extracts, synthetic pesticides, bollworms, endogenous technology Résumé. Dans le but de trouver une méthode de lutte durable contre les chenilles ravageuses du cotonnier, I'efficacité biologique de différents extraits de plantes (Azadirachta indica, Kaya senegalensis et Hyptis suavolens) a été évaluée, en milieu paysan, seule ou en association avec des demi-doses d'insecticides de synthèse. Certains des traitements sont le résultat d'innovations paysannes. Les traitements ont été comparés six fois au cours de la saison culturale à des applications normales d'insecticides ou la combinaison de synthèse et á des traitements témoins. Les traitements, avec des doses normales d'insecticides ou la combinaison de I'extrait de graine de neem (6 kg/ha) associé à une demi-dose d'insecticides de sysynthèse, ont été les plus efficaces pour réduire la densité des chenilles et leurs dégâts. Ces deux traitements ont donné les meilleurs rendements avec un ratio coû t/bénéfice plus avantageux pour la mixture insecticide de synthése-exrait de graine de neem. Tous les insecticides utilisés à I'exception de I'extrait de neem utilisé seul, ont eu un effet toxique sur les prédateurs des ravageurs du cotonnier. Cette étude accroît la confiance des fermiers dans les locales. L'interaction entre le *

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Section: Discussionmentioning

confidence: 99%

Participatory evaluation of synthetic and botanical pesticide mixtures for cotton bollworm control

Sinzogan

Kossou

Atachi

et al. 2006

JTI

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“…We observed that adults exhibit a fast, erratic walking gait upon initial exposure to limonoid-treated plants but adopt a quiescent posture, often off the plant, after longer exposure (25). In another study, we found that season-long densities of adults were significantly lower in small field plots treated with 3.6 kg/ha of crude grapefruit extract than in untreated, control plots (27).…”

Section: Adult Reproduction and Behavioral Activity Studiesmentioning

confidence: 69%

“…In the laboratory, prior exposure to the limonoids did not alter larval mortality, but larval development was significantly delayed (27). In field tests, rates of adult beetle colonization and oviposition were significantly lower in plots treated with the endotoxin following treatment with limonoids.…”

Section: Synergism Studiesmentioning

confidence: 87%

Prospects for Citrus Limonoids in Insect Pest Management

Alford¹,

Murray²

2000

ACS Symposium Series

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Limonin and other citrus limonoids act as insect repellents, feeding deterrents, growth disrupters, and reproduction inhibitors against several pest species across a wide range of agricultural crops. We have investigated how these allelochemic properties can be deployed as ecologically sound methods of insect pest management and reduce dependence on conventional, synthetic insecticides in potato production. In a multi-stage process of study and product development, we demonstrated that field populations of Colorado potato beetles, Leptinotarsa decemlineata (Say), could be effectively managed using larvicidal applications of limonoids. Adult repellent and oviposition deterrent effects of limonoids can prevent these pests from colonizing and reproducing in potato fields and thereby reduce or eliminate the need for further pest control efforts. Limonoids also appear to act as synergists to enhance the effectiveness of other biological and conventional insecticides. Research and development approaches and limitations of these materials in agricultural pest management are described.The theoretical basis for using natural plant compounds like the citrus limonoids for the management of insect pests is within the concept of coevolution advanced by Ehlrich & Raven in 1964 (/). The coevolutionary process of plants and insects has resulted in a number of plant defenses, including an estimated hundreds of thousands of plant-produced chemicals (2). Plant-feeding insects select and recognize their food based on plant chemical characteristics acting as attractants and phagostimulants that promote host finding and feeding. Other phytochemicals may also inhibit feeding, disrupt growth and development, and modify behavior by acting as insect deterrents, repellents or toxins (3,4,5). The identification and development of these biologically active allelochemicals into effective, insect pest management components have been the goals of natural product chemists, entomologists and agriculturists for decades, but commercial successes have been relatively rare.Synthetic chemical insecticides, with their greater than fifty years of commercial dominance, have set the standards for assessment of all materials for controlling

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“…Normally, antifeedants are substances which when tasted can result in cessation of feeding of insect pests, while beneficial and non-target insects are not affected. In addition, the use of antifeedants put additional stress on insect pests, and can increase susceptibility to insecticides (Murray et al, 1993). Many antifeedants are isolated from plants, because of the high structural complexity of these antifeedants, the synthesis of these compounds for agricultural use may not be economically feasible, and our present study offers a new and feasible way for the control of insects by transgenic approach.…”

Section: Resultsmentioning

confidence: 99%

Expression of v-cath gene from HearNPV in tobacco confers an antifeedant effect against Helicoverpa armigera

Zhang

Wang

et al. 2008

Journal of Biotechnology

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Interactive Effects of an Antifeedant Used with Bacillus thuringiensis var. san diego Delta Endotoxin on Colorado Potato Beetle (Coleoptera: Chrysomelidae

Cited by 24 publications

References 0 publications

Participatory evaluation of synthetic and botanical pesticide mixtures for cotton bollworm control

Participatory evaluation of synthetic and botanical pesticide mixtures for cotton bollworm control

Prospects for Citrus Limonoids in Insect Pest Management

Expression of v-cath gene from HearNPV in tobacco confers an antifeedant effect against Helicoverpa armigera

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