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贵阳地区栽种的甘兰,受菜青虫(Pier-is rapae Linne)为害十分严重,长期以来采用单一农药(六六六)进行防治(至今仍未能禁用),用药量大,用药不适时,天敌大量减少。同时,菜青虫产生抗药性,使防治效果极差,农药残毒也严重影响着人畜健康,这是当前极需解决的一个问题。为此,我们选用了几种高效低毒的农药(系当地群众均可购买到的)和生物农药制剂(系武汉大学病毒系生产),进行了防治试验,试验结果表明:50％辛硫磷、40％多灭灵及Ⅱ型菜
Pigeon-planted Kale in Guiyang is very seriously damaged by Pier-is rapae Linne. It has long been used as a single pesticide (BHC) for prevention and treatment (it has not yet been banned) A significant reduction. At the same time, Pieris rapae produce drug resistance, so that the prevention and treatment effect is very poor, pesticide residues also seriously affect the health of people and livestock, which is currently a problem to be solved. For this reason, we selected several kinds of pesticides with high efficiency and low toxicity (which are available to local people) and biological pesticide preparations (Department of Virology, Wuhan University). The results showed that 50% phoxim , 40% more off the spirit and type Ⅱ dishes