摘要
本文报道繁殖和利用管氏肿腿蜂防治天牛中的几个关键技术问题的研究结果,试验在北京和山东平邑进行。用11种害虫作寄主繁蜂,以玉米螟为最合适。玉米螟可以用人工饲料大量饲养,用控制温湿度和光照时间,人工诱导进入滞育的玉米螟作寄主,寄生率达69.1％以上,繁蜂所需时间30天左右,每头幼虫繁蜂数为35.7头。在5、10、15℃中贮存肿腿蜂,以5℃中的死亡率为最低,贮存1、4、6个月死亡率分别为8.8％、41.2％、67.6％。在10℃中贮存1～6个月不影响寄生率,但出蜂数和雌性比随贮存时间的延长而下降。长期连续用玉米螟繁蜂,肿腿蜂生活力减退,用红缘天牛复壮,取得良好结果。1983～1984年在100余亩面积上释放肿腿蜂防治咖啡虎天牛和菊花天牛,寄生率均达70％以上。
In the laboratory, rearings conducted in Beijing, O. furnacalis was used as the factitious host of S. guani, .an important parasitoid of longhorn beetles, Cornborer larvae reared with the artificial diet were induced into diapause by manipulating the rearing temperature,. humidity and photophase before they were use.d in the rearings. The parasitization, of the larvae by the parasitoid was 69.1%. The parasitoid completed its life cycle in the host larva in 30 days. Each host could produce an average of 35.7 wasps. The wasps were stored at 10℃ for 6 months with no significant influence on their parasitical ability. Releasing the mass reared wasps in a field of 7 ha to control two cerambycid herb pests, Xylotrechus grayii on Lonicera japonica and Phytoecia nefiventris on chrysanthemum resulted in over 70% parasiti2ation.
关键词
管氏肿腿蜂
天敌
人工繁殖
天牛
Ostrinia furnacalis Scleroderma guani Xylotrechus grayii Phytoecia nefiventris mass rearing medical herb pests parasitoid
