From 2004 through 2005, plots of experimental transgenic cotton lines containing the vegetative insecticidal protein, Vip3A; δ endotoxin, Cry1Ab; and both Vip3A and Cry1Ab were evaluated for efficacy against certain lepidopteran pests. Results showed that the cotton line containing Vip3A was more efficacious against the beet Spodoptera exigua (Hübner) and fall armyworm Spodoptera frugiperda (J....

Study and research of Bt (Bacillus thuringiensis) transgenic plants have opened new ways to combat insect pests. Over the decades, however, insect pests, especially the Lepidopteran, have developed tolerance against Bt delta-endotoxins. Such issues can be addressed through the development of novel toxins with greater toxicity and affinity against a broad range of insect receptors. In this compu...

laboratory bioassays were carried out to evaluate the insecticidal efficacy of silicosec? against 7 - 14 day old adults, old and young larvae of tribolium castaneum (herbst) with the mean ? se (n = 30) weight of 3.4 ? 0.1 and 0.6 ? 0.1 mg, respectively at 27?c and 55 ? 5% rh. wheat treated with four dose rates of silicosec? and untreated wheat served as a control with three replications. adult?...

diatomaceous earth (de) is a dust composed of fossilized bodies of unicellular algae used as an insecticide. in this study, the insecticidal potential of four iranian de deposits was assessed in adults of oryzaephilus surinamensis (l.). three of de deposits were collected from maragheh, mamaghan, and khorasan jonoobi mines and sayan® formulation was obtained from kimia sabz avar company. the in...

The extensive use of insecticides in public health and agriculture sectors is the main reason for development of resistance in fleas associated in domestic rodents. The present work was planned to investigate the insecticidal efficacy of Lambda-cyhalothrin, Chlorpyrifos and Fenitrothion against rat flea (Xenopsylla cheopis) infesting rodent species in Giza Governorate, Egypt. The lethal concent...

A novel vegetative insecticidal gene, vip3A(a), whose gene product shows activity against lepidopteran insect larvae including black cutworm (Agrotis ipsilon), fall armyworm (Spodoptera frugiperda), beet armyworm (Spodoptera exigua), tobacco budworm (Heliothis virescens), and corn earworm (Helicoverpa zea) has been isolated from Bacillus thuringiensis strain AB88. VIP3-insecticidal gene homolog...