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Insecticidal activity of five Chinese medicinal plants against Plutella xylostella L. larvae

Authors Vanichpakorn, Patcharaporn; Ding, Wei; Cen, Xiao-Xi

Journal JOURNAL OF ASIA-PACIFIC ENTOMOLOGY , SEP 2010,3:13

DOI 10.1016/j.aspen.2009.12.006

Abstract Twenty-five extracts of five Chinese medicinal plant species were screened for insecticidal activity against the diamondback moth, Plutella xylostella L, larvae by a leaf dipping bioassay method. The ethyl acetate, ethanol, and acetone extracts of Veratrum nigrum L root and rhizome, the ethyl acetate extract of Phytolacca americana L root, and the petroleum ether extract of Pseudolarix kaempferi Gord. root bark were effective against P. xylostella. Among them, the ethyl acetate extract of V. nigrum showed the strongest insecticidal activity against the second and third instar larvae of P. xylostella, with LC50 values of 225 and 335 ppm, respectively. The other extracts gave little or no insecticidal activity against P. xylostella. These results indicated that V. nigrum may be a promising naturally occurring agent for P. xylostella larval control, and that the organic solvent used for plant extraction can affect its insecticidal activity. (C) Korean Society of Applied Entomology, Taiwan Entomological Society and Malaysian Plant Protection Society, 2010 Published by Elsevier B.V. All rights reserved.

Species covered 垂序商陆 Phytolacca americana 金钱松 Pseudolarix amabilis 藜芦 Veratrum nigrum