Influence of Plant Extracts on Biological Traits of Spodoptera Litura (Fab.)

Present investigation was undertaken to find out the effect of various plant extracts on biological parameters of Spodoptera litura (Fab.) under laboratory conditions. The aqueous extracts of A. indica, A. Squamosa, T. erecta, C. longa, Ipomoea sp. and O. Basilicum significantly affected various biological parameters of Spodoptera litura (Fab.). The effects were deleterious when second instar larvae of S. litura were exposed on treated diet for 24 hr. The larval and pupal weights reduced under the influence of plant extracts as compared to control. Larval mortality was, however, highest on A. indica. Adult emergence was significantly reduced in extracts of A. indica, A. Squamosa seed and T. Erecta leaves. The female fecundity and egg hatch ability also significantly reduced. Lowest fecundity as well as egg hatch ability were recorded in case of A. indicated extract.