EVALUATION OF ANTIFEEDANT PROPERTIES OF SOME PLANT EXTRACTS AGAINST DIAMONDBACK MOTH, Plutella xylostella (LINN.)

摘要

Oil extracts of nine medicinal plant species were screened for the presence of antifeedant properties against diamondback moth (DBM), Plutella xylostella (L.). Among the tested plants species, Vitex trifolia, Artemisia vulgaris, Agerafum conyzo/des and Eucalyptus globulus were found to possess strong antifeedant activity on the basis of minimum per cent feeding and maximum protection over control. Further, V trifolia recorded the lowest PC_(95) value of 0.41 5 per cent, which was 2.16, 5.34 and 13.05times lower than extracts of E. globulus, A. vulgaris and A. conyzoides, respectively. However, the extracts of Phlogocanthus thysiflorus revealed least antifeedant property and the remaining plant extracts exhibited slight to moderate effect on the pest.