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近年来,棉铃虫的发生危害逐年加剧,1990年三、四代棉铃虫在河北、山东、河南等省主产棉区严重发生后,1992年在我国北方又特大发生,对棉花、小麦、玉米、花生、蔬菜等农作物的猖獗危害程度均为近几十年所罕见。因而在棉铃虫综合防治中,用有效的农药品种进行及时防治控制棉铃虫猖獗危害,对确保棉花不致因虫灾而减产,在棉铃虫大发生年份尤为显得重要。1992年在河南新乡
In recent years, the occurrence and harm of the cotton bollworm have been aggravating year by year. After the serious occurrence of cotton bollworm in Hebei, Shandong and Henan in 1990 and 1990, cotton bollworms occurred in the north of our country again. The cotton, wheat, corn Peanuts, vegetables and other crops rampant damage are rare in recent decades. Therefore, in the comprehensive control of cotton bollworm, the effective control of pesticide varieties in a timely manner to control the rampant hazards of cotton bollworm, to ensure that cotton will not be cut due to pests and insect pests, especially in the year of occurrence of bollworm is particularly important. 1992 in Xinxiang, Henan