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1992年5月19—21日,全县网捕麦田30块,平均百复网有棉铃虫幼虫24—70头,最高达125头,重发田百茎小麦有虫18头,史无前例,使小麦减产5％-10％。 二代棉铃虫百株产卵量历史罕见。地膜棉百株累计1805粒,直播棉1860粒,麦棉套2012粒,是历史平均值的8—10倍。以往主要为害棉花,1992年还严重为害花生、玉米、果树、豆子、芝麻、西瓜及多种蔬菜,以至后期多种杂草也被取食。二代盛期百穴花生有虫800—1000头,百株西瓜1000多头。
May 19-21, 1992, the county network of 30 catches of wheat fields, the average number of resurgence of cotton bollworm larvae 24-70, up to 125, 100 fields of wheat stem cell repeats 18, unprecedented in the history of wheat Cut 5% -10%. The second generation of cotton bollworm hundred oviposition history rare. Cotton membrane hundred plants a total of 1805, 1860 live cotton, wheat cotton cover 2012, is the historical average of 8-10 times. In the past the main damage to cotton, in 1992 also seriously damaged peanuts, corn, fruit trees, beans, sesame, watermelon and a variety of vegetables, and even a variety of weeds were later fed. The second generation of hundred peanut pest 800-1000 head, one hundred watermelon more than 1000 heads.