不同白蜡属树种对小线角木蠹蛾抗性差异研究

Study on the Resistance of Different Fraxinus Species to Streltzoviella insularis

为摸清绒毛白蜡和速生白蜡两种白蜡属树种对小线角木蠹蛾的抗性,通过调查小线角木蠹蛾对两种白蜡属树种的为害情况,利用被害指数抗性水平等级判定两种白蜡属树种对小线角木蠹蛾的抗性程度,并进行了虫情调查和树皮结构分析。结果表明:绒毛白蜡为2级抗性水平,对小线角木蠹蛾有较强的抗性;速生白蜡为4级抗性水平,对小线角木蠹蛾抗性很弱。为在造林规划设计中选择抗病虫害树种造林提供依据。

In order to understand the resistance of Fraxinus velutina and Fraxinus americanc to Streltzoviella insularis,by investigating the danger of Streltzoviella insularis to two species of Fraxinus,the resistance level of two species of Fraxinus Streltzoviella insularis was determined by the resistance level of the danger index,and the resistance level of two species of Fraxinus9punctaXus to Streltzoviella insularis was calculated,the pest situation and bark structure were investigated.The results showed that the resistance of Fraxinus velutina to Streltzoviella insularis was at the level o£2,and that of fast-growing Fraxinus americanc was at the level of 4,with weak resistance to Streltzoviella insularis.It provides the basis for selecting the tree species resistance to diseases and insect pests in afiorestation planning and design.