拉萨河曲丝叶蜂发生概况与防控对策

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摘要 经调查，自2016年来，拉萨市城关区、聂当乡、柳梧新区和堆龙德庆区均发现河曲丝叶蜂危害柳树，发生面积逐年扩大，河曲丝叶蜂逐渐成为拉萨市危害最为严重的林业有害生物之一。分析了拉萨市河曲丝叶蜂发生的3种原因，并提出了相应的防控对策。

关键词 河曲丝叶蜂;发生概况;防控;对策

Abstract Through investigation，the willow sawfly Nematus hequensis Xiao feeding leafs on willow trees in Chengguan District，Niedang Township，Liuwu New District and Duilong Deqing District since 2016 in Lhasa has been found，and the willow sawfly has gradually become one of the most serious forest pests in Lhasa.This paper analyzed three reasons of the occurrence of Nematus hequensis Xiao in Lhasa，and finally proposed corresponding countermeasures and suggestions.

Key words Nematus hequnsis Xiao;General situation;Control;Strategies

楊、柳树是拉萨市及周边地区造林绿化、防护林及重点区域生态林建设、城镇周边及四旁绿化的主要树种[1]，对确保高原生态安全、促进社会进步和经济可持续发展具有重要意义。（剩余3794字）