白蜡敛片叶蜂发生规律及色板诱捕效果

Occurrence regularity of Tomostethus fraxini Niu&Wei and trapping effect of different colored sticky traps

白蜡敛片叶蜂Tomostethus fraxini Niu&Wei是近年来在华北和华东地区危害白蜡Fraxinus spp.的一种膜翅目叶蜂科食叶新害虫,严重时可将白蜡叶片吃光。为促进绿色防控技术研究与应用,在北京市的百望山森林公园和西山国家森林公园调查了白蜡敛片叶蜂的发生规律及其生活习性,并在其发生区开展了不同颜色不同布设方式的粘虫板诱捕试验。结果显示:4种颜色粘虫板对白蜡敛片叶蜂均有诱捕效果,悬挂的蓝色和黄绿色粘虫板诱捕平均值显著高于其他处理组,且诱捕效果优于树干围环方式;蓝色和黄绿色粘虫板在阳光充足区域的单日诱捕数量显著高于阳光不足区域;同一时期蓝色、红色粘虫板诱集到天敌昆虫数量相对较少、益害比较低,使用蓝色和红色粘虫板对益虫伤害较小,对保护利用天敌昆虫具有重要意义。综合分析认为,在阳光充足区域悬挂蓝色粘虫板控制白蜡敛片叶蜂成虫效果最佳。

Tomostethus fraxini Niu&Wei(Hymenoptera,Tenthredinidae),a new defoliator,has seriously harmed Fraxinus spp.in recent years in North and East China.In order to promote the research and application of green prevention and control technology,the occurrence pattern and living habits of T.fraxini were investigated in Baiwangshan Forest Park and Xishan National Forest Park in Beijing,and the trapping experiments of different colored sticky traps with different layout ways were carried out in the occurrence areas of T.fraxini in the two parks.The results showed that T.fraxini could be trapped by four colors of sticky traps.The average number of T.fraxini trapped by hanging blue and yellow‑green sticky traps was significantly higher than the number of the others,and the hanging effect was better than that around the trunk.The daily number of T.fraxini trapped in areas with sufficient sunlight was significantly higher than that in areas with insufficient sunlight.Besides,the number of natural enemies and the ratio of beneficial insects to pests trapped by blue and red sticky traps was relatively low,indicating that using blue and red sticky traps to control T.fraxini was less harmful to beneficial insects,and it had important significance for the protection and utilization of natural enemies.Based on comprehensive analysis,hanging blue sticky traps in a sunny area has the best effect on controlling the adults of T.fraxini.