山东省五代棉铃虫大发生王厚振（山东省植保总站，２５０１００）山东为棉铃虫的四代发生区，个别年份虽有四代成虫羽化，出现五代卵和幼虫，因气候食物不适宜，幼虫完成不了发育，对棉花生产没有影响。１９９４年不但出现完全五代，而且对棉花造成危害，不得不用农药防治... Occurrence of Five Generation Cotton Boll Worm in Shandong Province Wang Houzhen (Plant Protection Station of Shandong Province, 250100) Shandong is the fourth generation of cotton bollworm occurrence area. Although four generations of adult pests emerge and five generations of eggs and larvae occur in individual years, the larvae can not be completed due to the unfavorable climate food Development, no effect on cotton production. In 1994 not only appeared completely five generations, but also caused harm to the cotton, had to use pesticide prevention and treatment ...