Bioefficacy of plant extracts against Asian army worm Spodoptera litura Fab. (Lepidoptera: Noctuidae)
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Abstract
Bioefficacy of hexane, chloroform and ethyl acetate leaf extracts of Blumea mollis and Hygrophila auriculata was studied against Spodoptera litura to find out their antifeedant, larvicidal, larval duration, pupal duration and pupicidal activities. There was a corresponding increase in antifeedant, larvicidal, larval duration, pupal duration and pupicidal activities when there was increased in the concentration of the test extracts. Ethyl acetate extract of H. auriculata at 5.0% concentration had higher antifeedant (68.48%) and pupicidal (70%) activity. The LC50 value of 3.34% was observed in ethyl acetate extract of H. auriculata for larval mortality. Ethyl acetate extract prolonged the larval and pupal duration of S. litura.
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