Anh Hong, P. STUDY ON THE EFFECTS OF PESTICIDE ACTIVE ROTENOID EXTRACTED FROM DERRIS (DERRIS ELIPTICA BENTH AND DERRIS TRIFOLIA) AND YAM BEEN TREE (PACHYRHIZUS EROSUS URBAN) ON DIAMOND-BACK MOTH (PLUTELLA XYLOSTELLA). VNUHCM Journal of Science and Technology Development 2002, 5, 37-42.