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棉铃虫(Heliothis armigera)是我国黄河流域棉区的常发性害虫,1990年三、四代棉铃虫在棉花上,1992年一代棉铃虫在小麦上,二、三、四代在棉花上暴发成灾,对棉花生产构成了严重威胁,预测近几年内棉铃虫的发生程度仍呈上升趋势,势必成为限制我国棉花生产发展的重大障碍。1 棉铃虫大发生的概况及特点1990年三、四代棉铃虫在山东、河北两省及河南部分棉区暴发成灾,仅山东、河北两省减产皮棉1亿公斤左右。1992年棉铃虫在黄河流域棉区,江苏北部、安徽淮北、湖北及辽宁部分地区大暴发,在各种作物上棉铃虫第1—4代累计发生3.34亿亩次,在棉
Heliothis armigera is a common pest in the cotton area of the Yellow River basin in China. In 1990, the third and fourth generations of cotton bollworm were on cotton. The first generation of bollworm in 1992 was on cotton in the second, third, The disaster posed a serious threat to cotton production. It is predicted that the occurrence of cotton bollworm will continue to increase in recent years and it will inevitably become a major obstacle to the development of cotton production in China. 1 Overview and Characteristics of Large Occurrence of Cotton Boll Worm Three or four generations of cotton bollworms broke out in some cotton districts of Shandong Province, Hebei Provinces and Henan Province in 1990, and only about 100 million kg of lint cotton was cut in Shandong and Hebei provinces. In 1992 cotton bollworm in the Yellow River cotton area, northern Jiangsu, Anhui Huaibei, Hubei and Liaoning areas in some areas outbreaks, in a variety of crops on the 1st -4th generation of cotton boll occurred 344 million acre times, in cotton