Antifeedant effect of some plant extracts on the Asian armyworm, Spodoptera litura (Fabricius).

摘要

Plant extracts of Azadirachta indica [neem], Citrus sinensis [oranges], Vitex negundo and Zingiber officinale [ginger] were evaluated for their antifeedant and growth inhibitory activities against last instar larvae of Spodoptera litura, a pest in groundnuts. Deterrent effect were found in all plant extracts. The strongest deterrent effect was found in V. negundo and was indicated by very low food consumption and digestibility, faecal pellets production, and reduced body weight. The percentage of deformity in pupal as well as adult stages was the highest in Z. officinale, followed by A. indica and C. sinensis. All plant extracts showed antifeedant action and growth inhibition.