寄生蜂对美洲斑潜蝇自然种群控制作用的评价

应用作用因子生命表方法以及在此基础上提出的排除作用控制指数法评价了寄生蜂对美洲班潜蝇自然种群的控制作用，结果表明，底比斯釉姬小蜂，丽潜蝇姬小蜂，冈崎釉姬小蜂，异角姬小蜂，黄潜蝇姬小蜂，甘蓝潜潜蝇茧蜂和离潜蝇的种群数量将比原各群增长1．23，2．73，5．98，5．92和5．71倍，在春季菜豆，豇豆，丝瓜和黄瓜上第2代美洲斑潜蝇中，若排除寄生蜂作用因子后，美洲斑潜蝇在上述4种蔬菜上的种群数量将分别多增长2．73，2．87，2．24和1．89倍，寄生蜂对美洲班潜蝇3龄幼虫的控制作用大于1龄，2龄幼虫和蛹的控制作用；春季美洲斑潜连续世代中，第1，2代寄生蜂的控制作用较第3，4，5代低，寄生蜂有菜豆和豇豆上的控制作用比在丝瓜和黄瓜上高。

Controlling effect of parasitoids on population of vegetable leaf miner Liriomyza sativae Bianchard

The controlling effect of parasitoids on vegetable leaf miner,Liriomyza sativae Blanchard,was evaluated by using acting factor life tables and exclusion inex of population control(EPIC).The results showed that Chrysocharis pentheus,Neuchrysocharis formosa,Chrysonotomyia okazakii,Hemiptarsenus varicornis,Chrysocharis sp.,Opius dimidiatus and Opius dissitus played an important role in controlling the population of vegetable leaf miner.The EIPCs of parasitoids were 1.23,2.73,5.98,5.92 and 5.71,respectively for the five generations of L.sativae on kidney bean planted in spring,from the 1st to the 5th generation and,for the 2nd generation in particular,they were 2.73,2.87,2.24 and 1.89,respectively on kidney bean,cowpea,luffa and cucumber,indicating that if the parasitoids were excluded,the population of the next generation of L.sativae would increase by times accordingly.The EIPC of parasitoids for the 3rd instar larvae was usually the largest among different instar larvae and pupae,and the EIPCs for the 3rd to 5th generation of L.sativae on spring kidney bean were higher than those for the 1st and the 2nd.The EIPCs of parasitoids for L.sativae on kidney bean and cowpea were larger than those on luffa and cucumber.