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对美国白蛾越冬代成虫羽化规律及产卵习性进行了研究 ,找出了影响羽化及产卵的关键气候因子。即连续 5d日平均气温达到 1 2℃、RH在 6 8%以上时 ,越冬代成虫开始羽化 ;连续 5～ 6d日平均气温高于 1 6℃时 ,出现羽化高峰 ;当日平均气温低于 1 5 7℃时 ,出现羽化低峰。雄成虫比雌成虫羽化始期早 8d ,羽化末期晚 5d ;雄成虫趋光性和飞翔能力强于雌成虫 ,但存活时间短于雌成虫 ;雌成虫的产卵量受产卵环境影响 ,不交尾的雌成虫产卵量极少
The feathering habits and spawning habits of the adult American white moth overwintering were studied, and the key climatic factors affecting feathering and spawning were identified. That is, the average temperature reached 1 2 ℃ on 5 days and the overwintering adults began to emerge when the RH was above 6 8%. The peak appeared on the day when the average temperature was higher than 16 ℃ for 5 ~ 6 d, and the average daily temperature was below 15 At 7 ℃, emergence of low peak. Male adult adults had 8 days early eclosion stage and 5 days late eclosion stage. Male adults had stronger phototaxis and flight ability than female adults, but their survival time was shorter than that of female adults. The fecundity of females was affected by spawning environment, Adult fecundity is minimal