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松梢螟在我省马尾松、黑松林区普遍发生。近几年来,对引种的火炬松、湿地松也有危害,特别是对火炬松的危害比较严重。经调查,对火炬松的危害率一般达70—80％,对生长较差的阔冠曲枝类型,危害率可达95％以上。危害特点是:蛀入梢或球果,将嫩梢蛀成坑道,使其枯萎或折断。主梢受害后高生长受到抑制造成树干分叉和弯曲。虽然火炬松生长快侧梢能很快代替主梢,但出材率和种子产量要受到严重影响的。松梢螟为钻蛀性害虫,一旦蛀入,在防治上就造成很大困难。因此,要
Pine tip borer in our province masson pine, black pine forest generally occur. In recent years, the introduction of loblolly pine, pine is also hazardous, especially for the harm of loblolly pine more serious. After investigation, the damage rate to loblolly pine is generally up to 70-80%, and the less well-tolerant broadleaved branch type, the damage rate can reach more than 95%. Harm is characterized by: bores into the shoots or cones, the tender shoots into tunnels, make it withered or broken. After the main shoot victim growth inhibition was caused by the trunk bifurcation and bending. Although the rapid growth of lateral loblolly pine can quickly replace the main shoot, but the yield and seed yield to be severely affected. Pine needles for boring sex insects, once boring, in the prevention and control caused great difficulties. So, want