短时高温暴露对Q型烟粉虱存活和生殖适应性的影响

在室内将Q型烟粉虱Bemisia tabaci Q-biotype成虫在44℃下暴露1 h后观察成虫的存活率、产卵量、雌雄寿命和后代存活能力,以研究短时高温暴露对Q型烟粉虱生物学特性的影响。结果表明,Q型烟粉虱成虫在44℃下暴露1 h后的存活率为43.5%,暴露热激后的单头雌虫的产卵量为77.2粒,低于常温下(26℃)的产卵量(100.1粒);短时高温可显著缩短Q型烟粉虱成虫的寿命,在44℃下暴露1 h后Q型烟粉虱雌雄虫寿命分别为14.5 d和10.2 d,显著低于常温下(26℃)雌虫20.4 d和雄虫18.2 d;短时高温对Q型烟粉虱后代存活率和雌雄性比无显著影响,但其产卵高峰期延迟,产卵持续期缩短。以上结果表明,短时高温热激可影响Q型烟粉虱的生殖情况,造成Q型烟粉虱产卵量降低和寿命缩短,Q型烟粉虱雌虫耐热性强于雄虫。

Effects of brief exposure to high temperature on survival and reproductive adaptation of Bemisia tabaci Q-biotype

The survival rate,fecundity,longevity and offspring viability of the Bemisia tabaci Q-biotype was studied.The survival rate of adults kept in climatic incubators at 44℃ was 43.5%.After exposure to 44℃ for 1 h,female fecundity was 77.2,lower than that of females kept at 26℃（100.1）.Significantly lower longevity was observed in adults of both sexes kept at 44℃ compared to those kept at 26℃.Female adults were more heat tolerant than the males.Temperature had no effect on offspring survival or the sex ratio of the next generation,but higher temperatures delayed the peak of oviposition and shortened its duration.The results indicate that exposure to high temperature has a significant effect on the reproduction of the B.tabaci Q-biotype.