褐飞虱第５代是我市晚稻的主害代，常年５代，成虫盛期在９月中旬或下旬，而我市这一时期常出现低温寒流天气。为了解低温天气对褐飞虱发生期、发生量的影响，１９９７年，我们在褐飞虱回迁虫量大（因其迁入期与本地５代成虫期基本吻合，故称为５代），并恰遇低温寒流天气... The fifth generation of brown planthopper is the main generation of late rice in our city, perennial 5 generations, adult peak in mid-September or late, and the city during this period often appear cold weather. In order to understand the impact of cold weather on the occurrence and occurrence of BPH, in 1997, we returned large quantities of BPH in the brown planthopper (due to its immigration period basically coincide with the 5th generation of local adult stages, so called 5 generations) Cold weather ...