The results showed that the concentration of the extracts of Croton tiglium,Macleaya cordata and Buddleia lindleyana on the Lipaphis erysimi of LC (50)were 186.94 mg/L,200.75 mg/L and 157.73 mg/L respectively.

• 研究结果显示 :巴豆、博落回和醉鱼草提取物对萝卜蚜的致死中浓度LC50 分别为 1 86.；94mg/L、2 0 0