《环境昆虫学报》

在温度25℃±1℃、RH 55%±5%、光周期16 L∶8 D条件下，构建了以豆蚜 Aphis craccivora为食物的大草蛉Chrysopa pallens实验种群生命表，明确其种群发育情况，并研究了饥饿对大草蛉食物利用率的影响。结果表明，大草蛉卵、1龄、2龄、3龄幼虫和蛹的发育历期分别为3.03、3.10、3.39、4.43和12.52 d，雌成虫平均寿命为29.38 d，个体繁殖力为325.76±16.06粒。内禀增长率（r）、周限增长率（λ）、净增殖率（R0）和世代平均周期（T）分别为0.1197 d^-1、1.1076 d^-1、68.41粒/个体和41.36 d。在饥饿胁迫下，大草蛉3龄幼虫的食物利用率显著高于2龄幼虫，且随着饥饿程度的增加，2龄、3龄幼虫的食物利用率也逐渐增大。说明在25℃时，以豆蚜为食物的大草蛉个体发育和种群增长情况较好，为以豆蚜作为替代食物饲养大草蛉以及大草蛉作为天敌昆虫防控豆蚜提供了理论基础；饥饿对大草蛉的食物利用率的研究为明确天敌昆虫在田间应用时面临食物短缺问题时的取食状况提供了基础数据。

英文摘要:

In order to clarify the population development of Chrysopa pallens feeding on Aphis craccivora, the life table was constructed under the conditions of 25℃±1℃, RH 55%±5%, 16 L∶8 D, and the impact of starvation on the food utilization rate was also studied. Results showed that the development duration of the egg, 1st, 2nd, 3rd instar larva and pupa were 3.03，3.10，3.39，4.43 and 12.52 d, respectively. The average longevity of female adults was 29.38 d, and the individual fecundity of female was 325.76 eggs. Intrinsic rate of increase (r), finite rate of increase (λ), net reproduction rate (R0) and mean generation period (T) of C. pallens were 0.1197 d^-1, 1.1076 d^-1, 68.41 eggs/individual and 41.36 d, respectively. At the same level of starvation, the food utilization rate of the 3 rd instar larvae was significantly higher than that of the 2nd instar, and with the increased duration of starvation, the food utilization rate of the 2 nd instar larvae and 3 rd instar larvae also gradually increased.The results showed that C.pallens could grow and develop normally feeding on A. craccivora at 25℃, which provided theoretical support that A. craccivora could be a suitable prey for C. pallens, and also provided basic data for the feeding situation of C. pallens when faced with the problem of food shortage when used for biological control in the field.

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