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在养虫室自然条件下系统观察了棉铃虫的化性。越冬蛹春季羽化的早批种群一年能繁殖 5代 ,少量不完全的 6代 ;迟批种群只繁殖 4代。影响化性波动 (第 4代和第 5代的发生比率 )的主要因素是越冬后成虫的羽化时间和秋季越冬蛹滞育诱导的时间。越冬后成虫羽化的早晚与 4月份的温度密切相关 ;秋季越冬蛹滞育诱导的早晚取决于 9月下旬至 1 0月份的温度
Under the natural conditions in the rearing room, the chemical stability of the cotton bollworm was observed. Overwintering pupal spring emergence of early batch populations can reproduce 5 generations a year, a small amount of incomplete 6 generations; late batch only breeding 4 generations. The main factors that affect the volatility (generation 4 and 5 generation ratio) are the emergence time of adults after overwintering and the pupa diapause induction time in wintering winter. The temperature of April is closely related to the emergence of adults after overwintering. The fall of winter depends on the temperature of late September to October