Abstract
When 10% of the methanolic extract of Melia azedarach was used on Plutella xylostella, it afforded the best results regarding the larval mortality, larval period (prolongation), % pupation (reduction), less fecundity, less survival and entrance of the larvae to the treated food, maximum antifeedant values, maximum ovipositional deterrence under choice, no-choice and without actual contact conditions; and minimum hatching of the eggs. Amongst the fractions, 1% acetone showed the best results. Nimbecidene at 1% Conc. was found to be at par with the methanolic extract at 7.5% Conc.
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