白蜡吉丁肿腿蜂防治红缘天牛技术研究

Studies on Biological Control of Asias halodendri with Sclerodermus pupariae

红缘天牛是沙棘主要的蛀干害虫,常造成沙棘林成片死亡。由于红缘天牛钻蛀沙棘枝干,生活隐蔽,难于防治,利用天敌防治是控制红缘天牛的重要措施。本研究利用白蜡吉丁肿腿蜂防治红缘天牛,研究了白蜡吉丁肿腿蜂对红缘天牛的室内寄生情况和防治技术,结果表明：在室内,白蜡吉丁肿腿蜂在1︰1和1︰2的接蜂比例下都可100%寄生红缘天牛,5龄红缘天牛每头平均繁殖66.1头蜂;林间,放蜂量为1︰6-1︰10时,寄生率达33.6%,与1︰12-1︰20放蜂量的寄生率34.2%相差不大,故放蜂量为1︰6-1︰10时为最佳放蜂量,红缘天牛的虫口密度由放蜂前的1.2头/株降低到0.4头/株,差异显著。

As a main trunk borer, Asias halodendri can often cause forest of Hippophae rhamnoides to death. Be- cause A. halodendri drilled the branches and lived inside, it was difficult to control. It was an important measure to control A. halodendri by use of natural enemy. Through studying the parasitic situation of Sclerodermus pupariae, the results showed that S. pupariae could parasitize on A. halodendri with the host - parasitoid ratio of 1 ： 1 and 1 ： 2 in lab, and the parasitism rate of A. halodendri was 100%. Each five - year A. halodendri can propagate 66. 1 individuals in average. In the forest, the parasitism rate was 33.6% with the releasing bee amount of 1 ：6 - 1：10, and the parasitism rate was 34. 2% with the releasing bee amount of 1：12 - 1：20, so the optimum releasing bee a- mount was 1：6 - 1 ： 10. The population density of A. halodendri reduced from 1.2 to 0.4 with significant differ- ence.