The life history and predation rate of the ladybird beetle, Harmonia dimidiata Fabricius (Coleoptera: Coccinellidae) were compared at four different temperatures (16, 20, 24, and 28 °C). The beetles were fed on the bird cherry-oat aphid, Rhopalosiphum padi Linnaeus (Hemiptera: Aphididae) and investigated at 70 ± 10% RH with a photoperiod of 14:10 h (L:D). The reproductive rates (R0) were 20.07, 51.37, 66.95, and 14.54 beetle offspring at 16, 20, 24, and 28 °C, respectively. Results indicated that temperature had good impacts on the feeding potential, development, survivorship and fecundity, especially at 24 and 28 C compared with the other tested temperatures. In addition, the jackknife and bootstrap techniques were employed to estimate the population parameters' means. The obtained means of R0 and other population parameters, using the bootstrap technique fit a normal distribution. Meanwhile, the jackknife technique generated biologically meaningless zero values for R0. Both finite and predation rates were incorporated into limited predation rates for comparison of predation potential. Both of the growth and predation rates indicated that H. dimidiata is more effective biocontrol agent for R. padi at 24 and 28 °C than at 20, 16 °C.

中文翻译：

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在不同温度下以 Rhopalosiphum padi (Hemiptera: Aphididae) 为食的 Harmonia dimidiata (Coleoptera: Coccinellidae) 的年龄和特定阶段生命表参数

在四种不同温度（16、20、24 和 28 °C）下比较瓢虫甲虫 Harmonia dimidiata Fabricius（鞘翅目：瓢虫科）的生活史和捕食率。甲虫以鸟樱桃燕麦蚜虫 Rhopalosiphum padi Linnaeus (Hemiptera: Aphididae) 为食，并在 70 ± 10% RH 和 14:10 h (L:D) 的光周期下进行调查。在 16、20、24 和 28 °C 下，繁殖率 (R0) 分别为 20.07、51.37、66.95 和 14.54 只甲虫后代。结果表明，与其他测试温度相比，温度对摄食潜力、发育、存活率和繁殖力有很好的影响，特别是在 24 和 28 摄氏度时。此外，采用折刀法和自举法来估计总体参数的均值。得到的 R0 和其他总体参数的均值，使用引导技术拟合正态分布。同时，折刀技术为 R0 生成了无生物学意义的零值。有限捕食率和捕食率都被纳入有限捕食率中，以比较捕食潜力。生长率和捕食率均表明H. dimidiata 在24 和28 °C 比在20、16 °C 是更有效的R. padi 生防剂。