近年来,全国特别是北方棉区棉铃虫连年暴发为害,发生数量之大,为害作物种类之多、经济损失之重,均为历史罕见。抗药性剧增是其暴发为害的主要原因之一。筛选防治抗性棉铃虫新、特农药,不仅是控制其暴发为害的重要应急措施,也是治理其抗性的有效途径。1992～1994年我们对国内外5 In recent years, the cotton bollworm in the whole country, especially in the northern cotton area, has been affected by successive outbreaks in recent years. The number of crops is large, the number of crops harmed and the weight of economic losses are rare in history. The surge in drug resistance is one of the main causes of its outbreak. Screening for new and special insecticides against bollworm is not only an important emergency measure to control its outbreak but also an effective way to control its resistance. 1992 ~ 1994, we at home and abroad 5