大发生年二代棉铃虫卵在棉株上的分布及防治策略１大发生年二代棉铃虫卵在棉株上的分布在一般发生年份，棉铃虫二代卵主要集中在棉株顶尖嫩叶上，且多数在叶子正面，对防治较为有利。１９９２～１９９３年我地二代棉铃虫大发生，为了指导防治我们对大发生年棉铃虫卵在棉株... Large annual occurrence of second generation cotton bollworm eggs in cotton distribution and prevention and control strategies 1 Large annual occurrence of second generation cotton bollworm eggs in cotton distribution In the general year of occurrence, the second generation of cotton bollworm eggs are mainly concentrated in the top of the cotton plant leaves On the front, and the majority of the leaves, the more favorable for the prevention and treatment. From 1992 to 1993, the second generation of cotton bollworm occurred in our country, in order to guide the prevention and control of our annual cotton bollworm eggs in cotton plants ...