寄生小菜蛾的赤眼蜂蜂种选择II.几种赤眼蜂在米蛾卵上的繁殖潜能评价

通过组建几种不同来源的赤眼蜂在米蛾卵上的实验种群生命表结果表明 ,短管赤眼蜂和拟澳洲赤眼蜂在米蛾卵上的繁殖能力最强 ,内禀增长率为 0 .3664和 0 .3435,具有室内大量生产的潜力 ;碧岭赤眼蜂和特氏赤眼蜂的繁殖能力较强 ,其内禀增长率为 0 .3440和 0 .2 95,是在室内保种和繁殖的合适寄主 ;卷蛾分索赤眼蜂繁殖能力较差 ,内禀增长率为 0 .2 60 9,米蛾卵不是其室内大量繁殖的最佳中间寄主。

SELECTION OF EFFECTIVE SPECIES OF TRICHOGRAMMA EGG PARASITOIDS OF DIAMONDBACK MOTH, PLUTELLA XYLOSTELLA II. LABORATORY EVALUATION ON THE MASS-REARING POTENTIAL OF SEVERAL TRICHOGRAMMA AND TRICHOGRAMMATOIDEA SPECIES

Experimental population life tables of five Trichogramma and Trichogrammatoidea species of different origin on the eggs of rice moth, Corcyra cephaloica (Stainton), were constructed in the laboratory in order to select more easily reared species to against diamondback moth,Plutella xylostella . The results showed that among 5 species, T. pretiosum(from USA) and T. confusum (from Guangdong, China), had the highest intrinsic rate of natural increase(r\-m) on the rice moth eggs. Trichogrammatoidea bactrae (from Australia) had a lower r\-m on the eggs of rice moth. T. trjapitzini (from former USSR) and T. bilingensis had a lower preference to the eggs of DBM, but a higher rearing potential on the rice moth eggs.