林间释放松毛虫赤眼蜂防治微红梢斑螟试验

Preliminary study of controlling Dioryctria rubella by releasing Trichogramma dendrolimi in forest

比较了火炬松林和湿地松林内松毛虫赤眼蜂释放密度对微红梢斑螟的防治效果,结果表明:松毛虫赤眼蜂对微红梢斑螟虫口密度具有一定的控制作用,随着松毛虫赤眼蜂放蜂密度的增加,防治效果明显增加;不同树种松林防治效果有显著差异,在同一释放密度下,火炬松林分的防治效果明显高于湿地松林分。同时,分析了影响防治效果的各种因素,对林间释放松毛虫赤眼蜂防治微红梢斑螟的关键技术进行了探讨。

Effects of different releasing density levels of Trichogramma dendrolimi in the forests of Pinus taeda and Pinus elliottii on control of Dioryctria rubella were compared.The results showed that the release of T.dendrolimi had a certain function to the population density of D.rubella.The control effect increased significantly with the increase of releasing density of T.dendrolimi.However,the control effect on the two pine forests had a significant difference.With the same releasing density of T.dendrolimi,the control effect in the P.taeda forest was much better than that in the P.elliottii forest.Meanwhile,in this paper,the factors which influenced the control effect were analyzed and releasing technology of the T.dendrolimi in the forest to control of D.rubella was discussed.