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对褐飞虱、白背飞虱、灰飞虱等３种稻飞虱的不同虫态在３８℃恒温下，暴露不同时间后的生存率进行了研究。结果表明，随高温处理时间的延长，卵孵化率明显下降，卵历期延长。褐飞虱、白背飞虱卵在３８℃恒温下暴露１２ｈ后，卵孵化率比对照分别低３４％和４５％；暴露２４ｈ后，两种稻飞虱的卵孵化率均比对照低２５％；致死中时值ＬＴ５０分别为１１ｈ和１０ｈ。３种稻飞虱８日龄若虫及羽化后３天的雌雄成虫的生存率，随处理时间的延长而呈显著下降趋势，褐飞虱、白背飞虱和灰飞虱若虫的致死中时值ＬＴ５０依次为１５．６ｈ、１７．８ｈ和２５．９ｈ，长翅型雌成虫依次为３４．７ｈ、１７．１ｈ和４３．２ｈ，长翅型雄成虫依次为２８．９ｈ、２３．２ｈ和５４．５ｈ。另外，高温处理过的若虫，其羽化出成虫的体重明显下降，在高温下暴露３０ｈ后，白背飞虱长翅型雌成虫的体重比对照低３２％，褐飞虱短翅型雌成虫低５０％；高温处理后存活的白背飞虱雌成虫产出的卵块较小，总产卵量也明显下降。
The survival rates of different planthopper stages of the three planthoppers, BPH, BPPH and SBPH, at 38 ℃ and exposure time were studied. The results showed that with the prolongation of high temperature treatment, the egg hatchability decreased significantly and the egg duration prolonged. The hatching rates of brown planthopper and white-backed planthopper eggs were 34% and 45% lower than that of the control when they were exposed to constant temperature of 38 ° C for 12 hours, respectively. After 24 hours of exposure, the egg hatching rates of both planthoppers were 25% lower than that of the control; The median LT50 was 11h and 10h, respectively. The survival rates of 8-day-old nymphs and 3-day-old male and female adults of three planthoppers showed a decreasing trend with the prolongation of treatment time. The median lethal time of the brown planthopper, the white-backed planthopper and the naturalized planthopper larvae, LT50, Were 15.6h, 17.8h and 25.9h, respectively. The long-winged female adults were 34.7h, 17.1h and 43.2h, the long-winged male adults were 28.9h, 23.2h and 54.5h . In addition, the body temperature of the adult nymphs was significantly decreased after heat-treated nymphs. After exposed to high temperature for 30h, the body weight of long-bred female adults of Bbackbackedhoppers was 32% lower than that of the control, while the short-winged female adults of Nilaparvata lugens The fecundity of the females of the WBPHH survived the heat treatment was small, and the total fecundity also decreased significantly.