Wide Diurnal Temperature Amplitude and High Population Density Can Positively Affect the Life History of Sitobion avenae (Hemiptera: Aphididae)

文献类型： 外文期刊

第一作者： Xing, Kun

作者： Xing, Kun;Zhao, Fei;Xing, Kun;Sun, Dongbao;Zhao, Fei;Xing, Kun;Zhang, Jianzhen;Xing, Kun;Zhang, Jianzhen;Sun, Dongbao

作者机构：

关键词： population density; thermal amplitude; life history; English grain aphid; synergistic interaction

期刊名称：JOURNAL OF INSECT SCIENCE （ 影响因子：1.325； 五年影响因子：1.397 ）

ISSN：

年卷期： 2021 年 21 卷 2 期

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收录情况： SCI

摘要： Diurnal temperature amplitude is known to have a large influence on insect life history. Population density affects intraspecific competition and many other aspects of insect life history. However, there is limited information on the interactive effects of these factors on insects. Here, we tested the interactive effects of three diurnal temperature amplitudes (22 +/- 0 degrees C, 22 +/- 6 degrees C, and 22 +/- 12 degrees C) and three population densities on the development, survival, longevity, and fecundity of the English grain aphid Sitobion avenae (Fabricius) (Homoptera: Aphididae). At a constant temperature, increasing population density reduced the growth and survival of early-instar nymphs, increased longevity, and reduced fecundity. At a low population density, increasing temperature amplitude inhibited nymph development. However, even at a high temperature amplitude, nymph survival rate was higher than expected, and reproduction was possible because the recovery of the lower night-temperatures eliminated thermal stress. Increasing the population density reduced, and even reversed, the negative effects of the wide temperature amplitude. This may reflect synergistic interactions between population density and wide temperature amplitude as these stressors each incur energetic costs.These findings emphasize the importance of temperature amplitude and population density for improving prediction accuracy and damage assessment during pest control modeling.

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