摘要
稻白粉虱在湖南普遍发生，在攸县观察年发生６代，以老龄若虫（假蛹）越冬，５月迁入稻田为害，田间呈不均匀核心分布，世代重叠，为害程度以晚稻重于早稻，４～６月份和８～９月份的气候是影响其发生量的主导因子，应用扑虱灵１７５ｍｇ／ｋｇ对其若虫防效达９１．５％～９５．７％，对卵防效为２１．３％～４１．８％。
Rice white fly widely occurs in Hunan Province.There are 6 generations a year in Yu County,It spends winter with old nymph and migrates into peddy field in May. It appears with uneven kernel distribution and overlapping generations in the field.Rice white fly infects heavier in late rice than early rice.Climatic effect is the key factor which contributes to the build up of white fly between App.to June and Aug.to Sept..The efficacy of buprofezin with 175 mg/kg is 91.5%～95.7% for nymph and 21.3%～41.8% for egg.
出处
《植保技术与推广》
1997年第2期15-16,共2页
Plant Protection Technology and Extension
关键词
稻白粉虱
生物学特性
防治
Rice white fly biological property control
