温室效应对棉铃虫发生和危害的影响

就温室效应所引起的气候变化对棉铃虫发生的影响作了评述和讨论。当大气中ＣＯ＿２浓度倍增时，估计我国平均气温将升高２．６９℃。气候变暖将会导致棉铃虫发育速度加快，存活率和繁殖力提高；棉铃虫在全国四大棉区年发生世代数将普遍增加１代，此外，还会影响棉铃虫的滞育率和越冬基数，棉铃虫越冬界限将向北推移。气候变暖所引起的我国降水格局的改变也会影响棉铃虫的种群数量。

The Potential Influence of Greenhouse Effect on the Cotton Bollworm(Lepidoptera:Noctuidae)

In this review,the effects of increasing atmospheric greenhouse effects on the cotton bollworm, Heliothis armigera Hubner,are discussed. The discussion is based on an estimated increase in atmospheric temperature 2. 69℃ when increasing double atmospheric carbon dioxide in China.Changes in climate may result in changes in population growth rates,increases in the fecundity,and overwintering,with northward shifts in the overwintering line changing in diapause rates. An additional generation is expected in nearby all cotton regions. The outbreak rates of the cotton bollworm in Yangtse River valley and Yellow River Valley Cotton regions may be increased because of the climate warming and the drought.