中华通草蛉滞育成虫越冬能力的初步研究

本文研究了中华通草蛉滞育成虫在越冬期间的存活动态，结果表明，成虫在越冬前产卵量逐渐减少至停止产卵，部分产卵的雌虫可以进入滞育并开始越冬。利用较密闭的器具(如罐头瓶)贮存越冬成虫和提供充足的食物，能明显提高越冬成虫的存活率，提高越冬能力。至3月2日雄虫的存活率为71．31％，雌虫的存活率为84．74％。而3月中旬以后，越冬代成虫的存活率急剧下降，至4月30日，雌虫的存活率为41．88％，雄虫的存活率为5．36％。越冬代成虫在春季死亡率高，生殖成功率低，田问猎物量少，这可能是导致春季该虫在田问种群数量低的主要原因。

PRELIMINARY STUDY ON THE OVERWINTERING ABILITY OF CHRYSOPERLA S1N1CA (TJEDER)

The preliminary study was carried out to understand the overwintering ability of the lacewing Chrysoperla sinica (Tjeder) outdoors. The results showed that the survival rate of adults in natural overwintering site could be enhanced by collecting and storing them in the relative airtighr containers and providing them sufficient foods during the course of overwintering. Up to March 2 the survival rate of male and female still remained 71. 31% and 84. 74%, respectively. After the middle of March, the survival rate decreased steeply, on April 30 the survival rate of female and male was 41. 88% and 5. 36% , and the survival rate of female was significantly higher than that of male. Why the adult population of C. sinica was low in spring was also discussed.