Effects of Periodically Repeated Heat Events on Reproduction and Ovary Development of Agasicles hygrophila (Coleoptera: Chrysomelidae)

文献类型： 外文期刊

第一作者： Wang, Yao

作者： Wang, Yao;Zhou, Zhong-Shi;Wang, Ren;Guo, Jian-Ying;Wan, Fang-Hao;Wan, Fang-Hao

作者机构：

关键词： Agasicles hygrophila;daily high temperature;ovarian development;oogenesis

期刊名称：JOURNAL OF ECONOMIC ENTOMOLOGY （ 影响因子：2.381； 五年影响因子：2.568 ）

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年卷期：

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收录情况： SCI

摘要： Insect development occurs within a specific temperature range. Constant temperature studies may produce misleading information on the eco-physiological impacts of temperature on the population dynamics of an insect species, as in most natural environments, temperature usually undergoes daily variation. In China, field surveys showed that the decline in the Agasicles hygrophila (Selman & Vogt) (Coleoptera: Chrysomelidae) population from early August to late September in summer resulted in difficulties in effectively controlling the population of Alternanthera philoxeroides (Mart.) Griseb (Amaranthaceae). Previous studies have largely ignored more natural, fluctuating conditions. In our study, we first investigated the impacts of different temperature conditions (25 degrees C constant temperature for 20 h with a 4-h period of a high temperature of either 30 degrees C, 33 degrees C, 36 degrees C, or 39 degrees C) on adult reproduction and longevity, egg development time, egg hatch rate, female ovarian development, and oogenesis of A. hygrophila. Our results indicated that high temperatures of 30 degrees C and 33 degrees C did not affect the female ovarian development and oogenesis of A. hygrophila. Contrarily, high temperatures of 36 degrees C and 39 degrees C negatively affected the population development of A. hygrophila. At 36 degrees C and 39 degrees C, the egg hatch rates were very low, and the egg development times significantly lengthened. The frequency of abnormal ovaries significantly rose at 39 degrees C. We concluded that the decline in the A. hygrophila population during August and September may be related to the extreme high temperatures that frequently occur in summer. These results help provide a better understanding of A. hygrophila population dynamics under natural conditions.

分类号： Q969.9

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