Three parasitoid species viz. Aphelinus asychis Walker (Hymenoptera: Aphelinidae), Aphidius ervi (Haliday) (Hymenoptera: Braconidae) and Diaeretiella rapae (McIntosh) (Hymenoptera: Braconidae) parasitizing the aphid species Myzus persicae (Sulzer) (Hemiptera: Aphididae) in mid-hills of north India were studied. At different locations and times of the year, the parasitization by A. asychis, A. ervi, and D. rapae ranged from 7.53 to 37.58, 4.26 to 80.45, and 74.25 to 80.48%, respectively. All the 3 parasitoids successfully completed their development on different nymphal instars of the aphid host and the total developmental duration of A. asychis, A. ervi, and D. rapae ranged 10.4–14.6, 24.2–29.6, and 10.2–15.2 days, respectively. It was significantly longer on the 1st nymphal instar of the host. The longevity of the female parasitoids was significantly longer than their counterparts. Differences in host age significantly influenced the longevity of female parasitoids and it was more on 1 to 2-day-old nymphs than that on 4 to 5-day-old nymphs. Fecundity and ovipositional periods of the parasitoids on younger (1–2 days old) host age group were considerably prolonged than on the older ages of the aphid. Average total fecundity of A. asychis and D. rapae was significantly higher when parasitizing 1–2-day-old nymphs. In A. asychis, host feeding behavior was also observed by a total host feeding of 89.2 aphids (1–2 days old) and 43.4 aphids (4–5 days old) during its life span. It is concluded that A. asychis, A. ervi, and D. rapae can be mass reared using M. persicae as host and can be utilized successfully in augmentative biological control program.

中文翻译：

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的寄生物种的性能Aphelinus asychis（：蚜膜翅目），沃克烟蚜ervi（茧蜂）（膜翅目：茧蜂科）和菜蚜茧蜂（McIntosh的）（膜翅目：茧蜂），采用桃蚜（苏尔寿）（半翅目：蚜科）作为宿主

三种寄生虫物种。Aphelinus asychis Walker（膜翅目：Aphelinidae），Aphidius ervi（节假日）（Hymenoptera：Braconidae）和Diaeretiella rapae（McIntosh）（Hymenoptera：Braconidae）寄生于北美蚜蚜Myzus persicae（Sulzer）对印度进行了研究。在一年中的不同位置和时间，A。asychis，A。ervi和D. rapae的寄生虫感染率分别为7.53至37.58、4.26至80.45和74.25至80.48％。所有这三种寄生虫均在蚜虫宿主的不同若虫龄上成功完成了发育，而A. asychis，A。ervi和D. rapae的总发育持续时间分别为10.4-14.6、24.2-29.6和10.2-15.2天。 。它在宿主的第一只若虫幼虫上明显更长。女性寄生虫的寿命明显长于雌性寄生虫。寄主年龄的差异显着影响雌性寄生虫的寿命，在1至2日龄若虫中比在4至5日龄若虫中的寿命更大。年轻的（1-2天）寄主年龄组的寄生虫的生殖力和产卵期比蚜虫的年龄长得多。寄生1-2天大的若虫时，A。asychis和D. rapae的平均总繁殖力明显更高。在A. asychis中，在其整个生命周期中，共进食了89.2蚜虫（1-2天大）和43.4蚜虫（4-5天大），也观察到了寄主的摄食行为。结论是，可以使用M.大量饲养A. erchis，A。ervi和D. rapae。