中华长尾小蜂种群特性研究及成虫发生期预测

中华长尾小蜂是栗瘿蜂的专性寄生蜂，１ａ发生１代，因该蜂与寄主的食物链关系，使自然种群数量每６～８ａ出现１次变动周期。引起数量消长的主要因素有性比、过寄生现象、重寄生现象、幼虫期死亡和成虫羽化死亡等。本文还利用成蜂羽化进度与日期、积温和栗芽伸长的相关关系建立中华长尾小蜂发生期预测曲线，应用表明该预测曲线与实际情况吻合。

Population Characteristics of Torymus sinensis Kamijo and Predicting Its Adult Occurrence Period

Torymus sinensis Kamijo was monophagous parasitoid specie of Dryocosmus kurriphilus Yasumatsu developed one generation in a year in Tai'an Aera The number of its nature populaction was appeared variation period once in six—eight years because of the factors of sex ratio, the rate of hyperparasits and epiparasit, the mortality of the larvae and adult emergence The prediction modle was estabelished based on the relationship among the development rate of the adult emergence and calender, accumulated temperature and the growth of chestnut buld The modle was compatible with the observation in fields