不同采果期对桃蛀果蛾幼虫发育及滞育的影响

Influences of Apple Maturity on the Development and Diapause of Carposina sasakii Matsumura

１９９５年７月在陕西杨陵调查了苹果不同采果期对桃蛀果蛾ＣａｒｐｏｓｉｎａｓａｓａｋｉＭａｔｓｕｍｕｒａ幼虫发育进度及其脱果幼虫滞育率的影响。结果表明，提前摘果可以促进幼虫发育，提早幼虫进入滞育的时间。７月２日、１１日和２１日采果者，幼虫脱果高峰和５０％个体进入滞育出现的时间相互间均各推迟８ｄ左右，说明提高果实成熟度可促进桃蛀果蛾幼虫的发育和滞育。此外讨论了桃蛀果蛾幼虫发育加快和滞育提前的原因。

The influences of apple fruit picking dates on the larval development and diapause incidence in the peach fruit moth, Carposina sasakii Matsumura,were investigated in an apple orchard in Yangling,Shaanxi Province,in July 1995.The results showed that in the picked fruits the larval development rate is accelerated and the incidence of diapause is increased.Both the peaks of larvae escaping off fruits and the dates of fifty percent larvae entering diapause were postponed by about 8 days within the fruits picked on 21,11 and 2 July,respectively.This indicated that the maturity of fruits might promote history diapause.The function of diapause in the seasonal history divergence of Carposina sasakii is also discussed.