中国森林食叶害虫防治研究概况

本文从化学防治、生物防治和物理防治三个方面,介绍了我国森林食叶害虫研究概况。化学杀虫剂是防治食叶害虫的主要手段,在树干上涂毒环、打孔注药可防治多种食叶害虫。松毛虫赤眼蜂和白僵菌已被大量应用。利用病毒治虫正在发展。用黑光灯诱杀可降低害虫密度。

A REVIEYV OF STUDIES ON CONTROL OF FOREST DEFOLIATORS IN CHINA

There are at least 1500 species of forest defoliators in China. Chemical control is the main measure to prevent them.Diflubenzuron is safety to natural enemies and can effectively control Pine caterpillars,e.g.tussock moths,prominents,bagworms,sawflies and elm leaf beetles.In recent years, some elder methods of pesticide application have been used too,such as making poison circle with stick matters or poison pen,enclosing poison rope on the stem of tree,all showed good effects to control aphids,psyllas,leafminers etc.Making holes in tree trunk with injecting Omethoate,Phosphamidon, Monocrotophos then or applying 3% Carbofuran into the soil under tree crown could control PhaIera puscescens,Basiprionota bisignata,Omphisa plagialis etc.The using of Trichogramma dendrolimi,Beauveria bassiana,Bacillus thuringiensis to control pine caterpillars have achieved a satisfatory result and was widely followed throughout the Country at present.The ultilization of NPV of poplar hooper,Apocheima cinerarius etc.is also in studying and developing.Manmade nests in forests attract many benificial birds and that makes a decrease of the populations of pine caterpillars and larch casebearer. Blacklight trap has an obviously inducing effect on Dendrolimus punctatus, Fentonia ocypete,Deileptenia sp.etc.The proper using of it can lighten the damages caused by some defoliators.