引诱蚂蚁捕食松褐天牛幼虫防治试验研究

Experimental study on attracting ants to prey on Monochamus alternatus larvae

本研究利用蚂蚁对昆虫的捕食习性,通过引诱蚂蚁进入松木内取食松褐天牛幼虫,达到降低松褐天牛的虫口密度、减少松材线虫病传播的目的。采用对比分析试验,在马尾松纯林和马尾松针阔混交林内,先将枯死马尾松砍倒截成木段集中放置,试验组集中诱集蚂蚁捕食松褐天牛,对照组用钢丝网打包枯死木阻止天牛羽化,通过观察蚂蚁捕食松褐天牛情况及调查林间松褐天牛成虫羽化数量和林间马尾松枯死数量,分析蚂蚁对松褐天牛的防治效果。结果表明:蚂蚁喜食松褐天牛幼虫,能降低松褐天牛虫口密度,通过诱集蚂蚁捕食松褐天牛幼虫能够间接降低次年林间马尾松枯死株数。

The study utilized the predatory habits of ants on insects,by inducing ants into Pinus massoniana to prey on the Monochamus alternatus larvae,to reduce the population density of Monochamus alternatus and reduce the transmission of Pine wilt disease.By using comparative analysis test,in the pure P.massoniana forest and the P.massoniana mixed forest,at first,the dead P.massoniana were cut down and cut into lengths for centralized placement,and then,in the experiment group,the ants were concentrated to trap M.alternates larvae in the dead P.massoniana,and in the control group,the dead P.massoniana were packed by steel mesh to prevent the M.alternatus emergence.By observing the ants prey on M.alternates larvae and investigate the number of hatched M.alternates and the number of the death P.massoniana,to analyze the control effect of ants to M.alternates.The results showed that the ants are like to feed on M.alternates larvae,and it is a good method to control the density of M.alternates.By concentrating the ants to trap M.alternates larvae in the dead P.massoniana can decrease the death number of the trees in the next year.