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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。
The Chinese long-tailed wasp is a parasitic wasp of the gallnut beetle. The larvae occur for one generation. Because of the food chain of the bee and the host, the number of natural populations changes once every 6 ~ 8a. The main factors causing the number of decline were sex ratio, parasitism, parasitism, larval mortality and emergence of adult worms. In this paper, the relationship between the progress of bee emergence and date, accumulated temperature and elongation of chestnut buds was also used to establish the prediction curve of the occurrence period of Chinese long-tailed bee. The application shows that the predicted curve is consistent with the actual situation.