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期 刊 ：植物保护学报 2008年

关键词：茄粗额蚜；川东獐牙菜；温度；湘西；

Keywords:Aulacorthum solani, Swertia dividii, temperature, western Hunan,

摘 要 ：茄粗额蚜Aulacorthum solani Kaltenbach 是湘西地区川东獐牙菜上的重要害虫,为揭示温度对其生长发育的影响,在室内研究了温度对其各虫期发育进度、存活及生殖的影响,并运用数学模型进行拟合。结果表明,茄粗额蚜1~4龄若虫发育起点温度比较整齐,平均为9.49±0.99℃,有效积温为91.98±2.46日·度,相关系数r=0.9850。完成整个世代发育的最适温度为22.25℃,发育的最低、最高温度分别是2.35℃和30.08℃。温度在接近最适发育温度时,无翅型比例最大,有翅型很少。茄粗额蚜在湘西地区发生的理论代数为27~29代。

Abstract:To clarify the effects of temperatures on development of Aulacorthum solani Kaltenbach on Swertia dividii Franch in western Hunan, the development progress of A.solani was dealt with in this paper using a mathematical model. The results showed that developmental threshold temperature of nymph of instars 1 to 4 was 9.49±0.99℃, and effective accumulated temperature was 91.98±2.46 day-degree (r=0.9850). Optimum temperature, lowest lethal temperature and highest lethal temperature were 22.25℃, 2.35℃ and 30.08℃. The ratio of wingless aphids was higher than winged aphids, when the temperature closed to optimum temperature. The theoretical generation was 27-29 probably in western Hunan.

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