混交林对云南松纵坑切梢小蠹的抗虫性研究

Study of pest resistance on mixed forest to Tomicus piniperda

在云南省纵坑切梢小蠹危害严重的地区,通过调查云南松与板栗、油杉、华山松、旱冬瓜、麻栎等树种以块状混交、行间混交、株间混交的混交林,研究纯林和不同混交林对纵坑切梢小蠹的抗虫性。结果表明:与纯林相比,混交林对纵坑切梢小蠹的抗性强;云南松与板栗、华山松混交林抗虫性好;不同混交方式的抗虫性,株间混交最好,行间混交次之,块状混交较差。

In the seriously damaged area of Tomicus piniperda in Yunnan Province,pest resistance to Tomicus piniperda of pure forest and different mixed forests was studied through surveying mixed forests of Pinus yunnanensis and Castanea mollissima,Keteleeria fortunei,Pinus armandii,Alnus nepalensis,Quercus acutissima which mixed by group,strips and single tress.The result showed that the pest resistance of mixed stand to Tomicus piniperda was stronger than pure stand.The insect resistance of mixed forests of Pinus yunnanensis and Castanea mollissima,Pinus armandii was better.The resistance of mixed by single tress was best,row mixed model was better,group mixture was bad.