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在室内(25±1℃,L:D=16:8光周期,RH=40%～60%)条件下,研究了茶足柄瘤蚜茧蜂Lysiphlebus testaceipes(Cresson)对苜蓿蚜Aphis craccivora(Koch)若蚜的寄生功能反应。结果表明:苜蓿蚜的龄期对茶足柄瘤蚜茧蜂的寄生作用有很大影响,用功能反应HollingⅡ模型模拟,其模拟方程为Na=1.118 N/(1+0.0184 N)。通过该方程可明确单头雌成蜂在24 h内最多寄生60.60头苜蓿蚜,其寄生1头苜蓿蚜所需时间为0.396 h。在5个温度梯度下,茶足柄瘤蚜茧蜂对苜蓿蚜的寄生功能反应均符合HollingⅡ模型,但不同温度下的功能反应参数有明显的差异。此外茶足柄瘤蚜茧蜂自身密度对寄生有一定的干扰作用,其干扰作用通过Hassell-Varley模型拟合,方程为a=0.0621P-0.3062,表明茶足柄瘤蚜茧蜂雌蜂的发现域随着自身密度的增加而逐渐变小,寄生蜂雌蜂个体间的相互干扰效应降低了寄生效能。
The effects of Lysiphlebus testaceipes (Cresson) on Aphis craccivora (Koch) in alfalfa were studied in laboratory (25 ± 1 ℃, L = D = 16: 8 photoperiod, RH = 40% ~ 60% If the parasitism function of aphids reaction. The results showed that the age of Aphis gossypii had a great influence on the parasitism of Aphidius crassipes, and the simulation equation was Na = 1.118 N / (1 + 0.0184 N) with functional response Holling Ⅱ model. Through this equation, it is clear that the maximum number of parasitoid parasitizing 60.60 alfalfa aphids parasitized by a single female adult within 24 hours is 0.396 h. Under the five temperature gradients, the parasitism responses of the Aphidius crassipes to Alfalfa aphid accorded with the Holling Ⅱ model, but the functional response parameters were different at different temperatures. Moreover, the autograft density of Aphis gossypii had some interference on parasitism. The interference effect was fitted by Hassell-Varley model, the equation was a = 0.0621P-0.3062, indicating that the discovery zone of the female wasps With the increase of its own density and gradually become smaller, the mutual interference between parasitoids and females reduce the parasitic efficiency.