论文部分内容阅读
在大型人工气候箱内模拟自然高温变温（２７℃－３８℃）下研究褐飞虱、白背飞虱、灰飞虱等３种稻飞虱种群的表现，并以恒温２８．３℃为对照。发现３种稻飞虱的卵孵化率在变温下暴露５天，１０天后，除白背飞虱卵孵化率在１０天处理下比对照下降３０％外，其他几种处理均和对照无显著差异；从发育历期来看，各虫种卵的发育速率随变温处理时间的延长而加快；３种稻飞虱若虫在变温处理５天后，褐飞虱，白背飞虱和灰飞虱的生存率依次为２０％，３０％和５５％，明显低于对照；变温处理１０天后，白背飞虱无一个体生存；褐飞虱比对照低７５％，灰飞虱低５０％；褐飞虱和白背飞虱雌成虫寿命明显比对照短；灰飞虱雌成虫的产卵量各处理间无显著差异，但白背飞虱和褐飞虱的产卵量在变温处理８天后，仅为对照的４０％和８０％，变温处理１５天后，分别为对照的１５％和５４％。
The population performance of three planthopper populations including BPH, BPPH and SBPH were studied under simulated high temperature and high temperature (27 ℃ -38 ℃) in a large artificial climate chamber. The temperature was controlled at 28.3 ℃. The results showed that the egg hatching rate of the three planthoppers was 5 days exposed to the change of temperature. After 10 days, the egg hatching rate of whitebacked planthopper was no significant difference compared with the control except that the egg hatching rate of whitebacked planthopper was reduced by 30% ; From the developmental period of view, the developmental rate of eggs of each species accelerated with the prolongation of temperature; the survival rates of the three kinds of planthoppers, Nymphs, 20%, 30% and 55%, respectively, which were significantly lower than those of the control. None of the whitebacked planthoppers survived after 10 days of temperature change treatment; the BPH was 75% lower than the control and the SBPH was 50% The longevity of adults was significantly shorter than that of the control. The fecundity of the females was no significant difference among treatments, but the fecundity of whitebacked and brown planthopper was only 40% and 80% After 15 days of variable temperature treatment, they were 15% and 54% of the control, respectively.