1990年以来,我国北方主要产棉区山东、河南、河北等地棉田棉铃虫连年大发生,尤其是1992年特大发生,麦田一代虫量猛增,一代蛾期延长,导致棉田二代棉铃虫龄期很不整齐,给防治增加了困难。为查清棉铃虫棉田二代幼虫发育不整齐的原因,作者就棉铃虫取食小麦不同部位对生长发育的影响进行初步调查研究,现将结果报告如下: Since 1990, cotton bollworm in cotton fields in Shandong, Henan and Hebei in the northern part of our country have been occurring year after year. Especially in 1992, the number of first generation cotton bollworms increased sharply and the number of first generation moths soared, leading to the second instar cotton bollworm age Period is very tidy, to control increased difficulty. In order to find out the reasons why the second-generation larvae of cotton bollworm are not well-developed, the author conducted a preliminary investigation on the growth and development of different parts of the cotton bollworn feeding wheat. The results are reported as follows: