植物性杀虫剂治理抗性小菜蛾

小菜蛾是我国蔬菜上的重要害虫。由于小菜蛾的抗性日益严重，使传统的防治方法，如化学防治、农业防治和生物防治难以有效地控制小菜蛾的为害。植物性杀虫剂含有多种对害虫有活性的成分，且作用靶标多，作用方式复杂，害虫不易产生抗药性。印楝、苦楝、黄杜鹃、胜红蓟等８０多种植物对小菜蛾具有较好的防治效果，是防治抗性小菜蛾的一种有发展前景的杀虫剂。

STUDIES ON THE CONTROL OF BOTANICAL INSECT ICIDES AGAINST THE DIAMONDBACK MOTH,PLUTELLA XYLOSTELLA

The diamondback moth( Plutella xylostellaZ) is one of the most important pests infesting vegetables in China and other countries. The resistance of the pest is increasing severely, which made it difficult to control effectively by traditional control methods, such as, chemical, agricultural and biological methods. Actions of botanical insecticides contain many different active constituents which target phitella xylostella therefore it can't develop resistance easily. More than 80 pieces insecticidal plants can be used to control the diamondback moth effectively, including Azadirachta indica, Melia azedarach and Rhododendron molle, as well as Ageratum conzoides.