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在实验室条件下,利用不同种类和品系的赤眼蜂Trichogramma spp.对灰白蚕蛾Ocinnara varians选择性和灰白蚕蛾对其适合性的差异,筛选防治灰白蚕蛾的有效蜂种和品系,结果表明,在供试的8种赤眼蜂中,松毛虫赤眼蜂Trichogramma dendrolimi、短管赤眼蜂Trichogramma pretiosum、舟蛾赤眼蜂Trichogramma closterae、暗黑赤眼蜂Tri-chogramma euproctidis和拟澳洲赤眼蜂Trichogramma confusum5种赤眼蜂较其它3种赤眼蜂更偏好寄生灰白蚕蛾的卵,每雌蜂在灰白蚕蛾卵上的接触次数、寄生卵数都相对较多,且羽化率也都较高。广赤眼蜂Trichogramma evanescens对灰白蚕蛾卵的接触次数最多,为6.60次/雌,但寄生卵数却很少,为4.55粒/雌,羽化率也很低,为27.86%。玉米螟赤眼蜂寄生灰白蚕蛾的卵比较多,为14.35粒/雌,但对灰白蚕蛾卵的接触次数很少,仅1.20次/雌,羽化率也很低,为24.17%。卷蛾分索赤眼蜂对灰白蚕蛾卵的接触次数和寄生卵数最少的,分别为0.60次/雌和2.20粒/雌,且被寄生卵全部不能发育成功。综合分析结果表明,松毛虫赤眼蜂是最适合寄生灰白蚕蛾卵的赤眼蜂种,可作为其生物防治的潜在寄生蜂。
Trichogramma spp of Trichogramma spp. Of different species and strains was used to screen for the differences between Ocinnara varians selectivity and its suitability to H. mongolicatus under laboratory conditions. The results showed that, Trichogramma dendrolimi, Trichogramma pretiosum, Trichogramma closterae, Tri-chogramma euproctidis and Trichogramma confusum 5, Trichogramma dendrolimi, Trichogramma dendrolimi, Trichogramma species prefer to parasitize white moth eggs more than the other three Trichogramma species, and the number of contact and the number of parasitic eggs per females on the gray silkworm moth eggs are relatively high, and the emergence rate is also higher. Trichogramma evanescens had the highest frequency of contact with gray silk moth eggs at 6.60 times per female, but the number of parasitic eggs was very small at 4.55 grains per female, with a very low emergence rate of 27.86%. Trichogramma ostriniae parasitic gray white moth eggs more than 14.35 / female, but the number of gray silkworm moth contact rarely only 1.20 times / female, emergence rate is very low, 24.17%. The number of contact and the number of parasitic eggs of T. molitor Trichogramma were 0.60 times / female and 2.20 / female, respectively, and all the parasitized eggs could not develop successfully. The results of comprehensive analysis showed that Trichogramma dendrolimi was the most suitable Trichogramma species to parasitize the parasitic gray mite eggs and could be used as a potential parasitic wasp for its biological control.