糠片蚧研究初报

 糠片蚧(Parlatoria Pergandii Comstock)系多食性害虫,主要危害柑桔,本文报道的是在苹果园中的发生情况。据1993～1995年调查,在云南各苹果主产区年发一代,两性繁殖后代,以雌虫越冬。雌成虫3月中、下旬开始产卵,平均产卵量78.6粒。在12～16℃,R.H₄₃～63%的自然条件下卵历期45.2天,孵化率为89.7%.室内饲养雌雄性比为1:0.75;5月中旬为若虫涌散盛期,亦为药剂防治最佳期。寄生性天敌主要是寄生蜂,捕食性天敌为瓢虫类,糠片蚧在苹果园中的发生与种苗引进及管理水平有关。

Preliminary Studies of Parlatoria Pergendii Comstock

The chaff scale is a polyphagous insect pest. This paper reported its occurence on the apple-producing area and its bionomics in Yunnan province During 1993～1995,surveys were conducted in 19 apple orohards it appeared one generation a year, andover wintered with the female. The hibernated female adults oviposit during the middle end late of March The average egg laying of female adults was 78.6 grains, and average egg stage was 45.2 days hatching rate 89.7% (under natural condition 12～16℃R H 43～63%). The prime hatched nymphae proliferated in middle May, and is also the proper time to apply insecticides to control the chaff seale. The chaff seale's main natural enemies as lady bugs and parasitic wasps were collecte.