Effects of heat shock on survival and reproduction of two whitefly species, Trialeurodes vaporariorum and Bemisia tabaci biotype B

文献类型： 外文期刊

第一作者： Wan, Fanghao

作者： Wan, Fanghao;Xie, Ming;Liu, Tongxian;Cui, Xuhong;Wan, Fanghao;Xie, Ming;Liu, Tongxian

作者机构：

关键词： sweetpotato whitefly;silverleaf whitefly;greenhouse whitefly;egg hatch;sex ratio

期刊名称：JOURNAL OF INSECT SCIENCE （ 影响因子：1.857； 五年影响因子：1.904 ）

ISSN： 1536-2442

年卷期： 2008 年 8 卷

页码：

收录情况： SCI

摘要： The effects of heat shock on survival and reproduction of two whitefly species, Trialeurodes vaporariorum ( Westwood) and Bemisia tabaci ( Gennadius) biotype B ( Homoptera: Aleyrodidae), were compared in the laboratory. Whitefly adults were exposed to 26 ( control), 37, 39, 41, 43 and 45 degrees C for 1 hour, and were then maintained at 26 degrees C. Adult survival was significantly affected when they were exposed at 41 degrees C or higher for B. tabaci or 39 degrees C or higher for T. vaporariorum. All males of T. vaporariorum were killed at 45 degrees C. In both whitefly species, females were more tolerant to high temperatures at 39 degrees C or higher than males. Female fecundity was not significantly different when B. tabaci adults were heat-shocked at all temperatures. In contrast, the fecundity of T. vaporariorum females declined with the increase of temperature, and only a few eggs were oviposited at 43 degrees C. Survival or hatch rates of the F1 nymphs of both whitefly species declined as heat-shock temperature increased, and no T. vaporariorum nymphs were hatched at 43 degrees C. Similarly, percentages of F1 offspring developing to adults for both whitefly species also declined as the heat-shock temperature increased. Sex ratios of the F1 offspring were not significantly affected for T. vaporariorum but were slightly affected for B. tabaci at 43 and 45 degrees C. The significance of heat shock in relation to dispersal, distribution and population dynamics of the two whitefly species is discussed.

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