1992年棉铃虫特大暴发,发生早,来势猛,属历史罕见,5月30日见卵,6月12日进入蛾、卵初盛期,比常年早8—11天。麦田调查,平均亩有幼虫4749头,约为常年发生量的10-20倍,二代定点百株累计卵卵量12453粒,为前10年百株累计卵量总和的1.76倍。并查到在一棉株中部叶片正面集中产卵达64粒的情况。 In 1992, the outbreak of bollworm occurred early and fiercely. It belongs to a rare history. On May 30, it saw eggs and entered the moths and eggs early on June 12, 8-11 days earlier than usual. Wheat field survey, an average of 4749 acres of larvae, about 10-20 times the annual occurrence, the second generation of fixed-point total number of egg egg 12453, the first 10 years of total cumulative egg volume of 1.76 times. And found in a cotton plant in front of central leaves spawning up to 64 cases.