桑粉虱研究初报

PRELIMINARY STUDY ON MULBERRY WHITEFLY Pealius mori TAKAHASHI

室内饲养桑粉虱，感温20℃，卵期平均7．6d；在18.38～19．59℃，幼虫期1龄平均6.2d，2龄3.1d，3龄4．0d，4龄及蛹期8.5d。室内饲养结合田间实验，桑粉虱成虫的单雌产卵量平均为21粒。成虫寿命室内为2～6d，室外有长于8d的。以蛹在落叶、土表和杂草中越冬。

Mulberry whitefly Pealius mori Takahashi was reared in laboratory. The mean egg stage was 7. 6 days at 20℃. The first、 second and third larval stages were 6. 2, 3. 5 and4.0 days, respectively, the fourth instar and pupa stage were 8. 5 days under the mean temperature of 18. 38~ 19.59℃. The life span of adult was 2~6 days in the laboratory and that of some adults was over 8 days outdoor. It overwinters as pupae in fallenleaves, soil surface and weeds.