Aphelinus asychis has been used to control various species of aphids. Temperature is a crucial abiotic factor for the development and reproduction of insects. This study examined the influence of different constant temperatures (20, 25 and 30 °C) on the longevity, net reproductive rate (R0), intrinsic rate of increase (r), net killing rate (Z0) and finite killing rate (θ) of A. asychis parasitizing the cabbage pest Myzus persicae, and compared its control efficiency. The results showed that increasing temperature decreased the longevity of A. asychis significantly. The value of r was significantly higher at 30 °C than at 25 and 20o C. Similarly, θ was significantly higher at 30 °C (0.7163 aphids) than at 25 (0.5654 aphids) and 20o C (0.3522 aphids). Aphelinus asychis could produce progeny successfully within the range of 20-30 °C and its control efficiency was higher at high temperatures than at low temperatures. We discuss the implications of these results for the application of this parasitoid for the biological control of the cabbage aphid in greenhouse and field conditions.

中文翻译：

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温度对白菜害虫 Myzus persicae 的寄生蜂 Aphelinus asychis 种群数量和防治效率的影响

Aphelinus asychis 已被用于控制各种蚜虫。温度是昆虫发育和繁殖的关键非生物因素。本研究考察了不同恒温（20、25和30°C）对寿命、净繁殖率（R0）、内在增长率（r）、净杀灭率（Z0）和有限杀灭率（θ）的影响A. asychis 寄生于白菜害虫 Myzus persicae 中，并比较了其防治效果。结果表明，升高温度显着降低了A. asychis的寿命。r 值在 30 °C 时显着高于 25 和 20o C。同样，θ 在 30 °C（0.7163 只蚜虫）下显着高于 25（0.5654 只蚜虫）和 20o C（0.3522 只蚜虫）。Aphelinus asychis可以在20-30℃范围内成功繁殖后代，其控制效率在高温下高于低温。我们讨论了这些结果对应用这种寄生物在温室和田间条件下对甘蓝蚜虫进行生物防治的意义。