ANTIFEEDANT EFFECT OF MAYTANSINOIDS FROM THE SEEDS OF TREWIA NUDIFLORA ON INSECT PESTS

Maytansinoids including Trewiasine,Trenudine and Treflorine isolated from the seeds of Trewia nudiflora L.have strong antifeedant effect on Plutella xylostella(Linnaeus).71.5%, 86.71% and 87.37% of the antifeedant efficiency were obtained by using 50ppm of them,respectively.10ppm Trenudine has 57.71% antifeedant efficiency on Plutella xylostella and 0.5% alcohol extracts has 68.5% effect.