1 Contact toxicity of several plant essential oil against diamondback moth(Plutella xylostella)
The contact toxicity of essential oils of five plants Zanthoxylum bungeanum Maxim, Artemisia argyi Levl.et Vant,Pinus massoniana Lamb,Platycladus orientalis(Linn.) Franco,Artemisia annua L.were observed in vitro against 2-nd instar larvae of diamondback moth,Plutella xylostella(Fab)by dropping bioassay in the lab.The result showed that percentage mortality of larvae increased when applied with high conc...