南岳松墨天牛的危害和防治

On the Damage and Control of Monochamus alternatus(Hope) in Nanyue

南岳景区的华山松PinusarmandiiFranch受到松墨天牛Monochamusalternatus(Hope)的严重危害 ,有虫株率达 39.9% ,致死株率达 2 6 .7% ,平均虫口密度为 2 1.2头 /株 ,最高达 6 0头 /株 .研究表明

Monochamus alternatus is a severe kind of pest that damages Pinus armandii in Nanyue scenic area.The number of infected trees is 39.9%, the mortal rate of trees is 26.7%,the average density of the insects is 21.2 per tree,with a maximum of up to 60 per tree. The results show that the damage of the pests may be controlled effectively by many kinds of defensive means.