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观察了 2 8 ,33和 36℃温度条件下棉铃虫生存和繁殖情况 ,并以 33℃高温处理不同发育阶段的雌虫和雄虫 ,比较分析了高温胁迫对其生殖力的影响。结果表明 :(1) 36℃高温胁迫下 ,棉铃虫的生存严重受影响 ,在此温度下试虫不能完成个体发育 ,无法进行生殖活动 ;33℃高温对其生存影响较小 ,但影响生殖 ,其产卵力和交配力都显著下降 ,且无有效卵产出。 (2 )高温对生殖力的影响存在性别和虫态差异。棉铃虫在未成熟期对高温 (33℃ )胁迫雄性敏感性大于雌性 ;雄性 6龄幼虫至 3日龄蛹期间对高温敏感 ,以 1～ 3日龄蛹最敏感 ;成虫期雌雄对高温均敏感。
The survival and reproduction of H. armigera were observed under the temperature of 28 ℃, 33 ℃ and 36 ℃, and the females and males at different developmental stages were treated at the high temperature of 33 ℃. The effects of high temperature stress on their fecundity were analyzed. The results showed that: (1) Under the high temperature stress of 36 ℃, the survival of H. armigera was severely affected. At this temperature, the test insects could not complete the individual development and could not reproduce. The high temperature of 33 ℃ had little effect on their survival but affected the reproduction, Its oviposition ability and mating force are significantly decreased, and no effective egg production. (2) The effect of high temperature on fecundity has the difference between sex and insect state. The susceptibility of H. armigera to male at high temperature (33 ℃) in immature stage was higher than that of female at the temperature of 33 ℃. The male 6th instar larvae were sensitive to high temperature at 3- .