苦皮藤乳油对菜粉蝶的毒性研究

Studies on Toxicity of KPT EC for Cabbage Butterfly

1 999～ 2 0 0 1年 ,采用室内生测和田间小区试验相结合的方法 ,对夏、秋甘蓝进行了 2 0 %苦皮藤乳油防治菜青虫技术研究。研究发现苦皮藤乳油对菜粉蝶卵没有明显的杀卵作用 ,但初孵幼虫因取食带毒卵壳及附近甘蓝叶而中毒 ,1 0 0 0mg/L浓度下 ,幼虫死亡率达 81 .5 3%。苦皮藤乳油与Bt混用有明显的增效作用。

KPT EC (Celastrus angulatus emulsified cream) was studied for controlling of Cabbage Caterpillar by the way of indoor test integrated with field experiment in summer and autumn Cabbage in 1999-2001.It was found that KPT EC was not obviously effect to kill the egg of Cabbage Butterly,but the larvas that got the food with poisonous egg shield and near leaves of Cabbage could be poisoned,with the death rate of 81.53% at 1000 mg/L KPT EC.KPT EC,mixed with Bt,could have obvious synergized action.