河北省及北京市区柳树光肩星天牛和桑天牛的调查及防治策略

[目的]为防治天牛类蛀干害虫对绿化树木的危害提供理论依据。[方法] 在河北省和北京市7个市（县）的15个植柳地点随机调查柳树2 760株。[结果] 在河北省，光肩星天牛危害幼龄柳树的被害率超过22.9%，危害中老龄柳树的被害率达50.8%。各地柳树受桑天牛危害较轻且差别不大，有虫株率为0.74%～7.35%，虫口密度为0.010～0.074头/株。保定栽植2年的4个柳树品种或品系的光肩星天牛有虫株率是桑天牛的9.62倍，虫口密度是桑天牛的45.67倍；在绦柳上光肩星天牛有虫株率是桑天牛的14.03倍，虫口密度是桑天牛的92.61倍；在旱柳上光肩星天牛有虫株率是桑天牛的17.51倍，虫口密度是桑天牛的76.71倍；在馒头柳上光肩星天牛有虫株率是桑天牛的1.20倍，虫口密度是桑天牛的5.36倍。[结论] 对城市园林绿化的植保及钻蛀性害虫的防治具有重要意义。

Investigation Research and Control Strategy on Anoplophora glabripennis and Apriona germari in Willows in the Cities of Hebei Province and Beijing City

[Objective] The research aimed to provide theoretical foundation for controlling the damage of tem-borer longicornia pests to virescence trees.[Method] The 2 760 willows in 15 willow-planted locations in 7 cities(counties) of Bejing City and Hebei Province were investigated randomly.[Result] In Hebei Province,the demage rate of young willows damaged by Anoplophora glabripennis exceeded 22.9% and that of middle-aged and old willows was up to 50.8%.The damage of Apriona germari to willows in various locations was lighter and had little difference,the rate of willow plants with A.germari was 0.74%-7.35% and its larvae density was 0.010-0.074 larvae/plant.Among the 4 willow varieties or lines planted for 2 years in Baoding,the rate of willow plants with A.glabripennis was 9.62 times of that of willow plants with A.germari and its larvae density was 45.67 times of that of A.germari;the rate of Salix matsudana plants with A.glabripennis was 14.03 times of that of S.matsudana plants with A.germari and its larvae density was 92.61 times of that of A.germari;the rate of Hankow willow plants with A.glabripennis was 17.51 times of that of Hankow willow plants with A.germari and its larvae density was 76.71 times of that of A.germari;the rate of Mantou willow plants with A.glabripennis was 1.20 times of that of Mantou willow plants with A.germari and its larvae density was 5.36 times of that of A.germari.[Conclusion] The research had important significance in plant protection and controlling boring-insect in urban landscaping.