甘肃省北京勾天牛风险分析

Risk analysis of Exocentrus beijingensis Chen in Gansu Province

摘要: 北京勾天牛是一种危害刺槐、苹果、海棠等林木的蛀干性害虫。2008年,甘肃省定西市安定区首次发现北京勾天牛(Exocentrus beijingensis Chen),该虫在当地一年发生一代,主要危害刺槐枝条,对甘肃省整体造林绿化成果构成很大威胁。通过对北京勾天牛进行风险分析,其风险值R=1.77,在甘肃属于中度危险性林业有害生物。

Abstract: Exocentrus beijingensis Chen was a stem-boring insect pest mainly attacking many trees,such as Robinia pseudoacacia Malus pumila and Malus spectabilis. It was first founded in Anding District, Dingxi City, Gansu Province in 2008 and occured one generation for a year.It mainly harmed the branches of R. pseudoacacia which could threaten the afforestation results of Gansu Province. The result of pest risk analysis showed that the R value of E. Beijingensis was 1.77 and was a moderate devastating forest pest in Gansu Province.