黔北地区核桃蛀干害虫云斑天牛天敌的筛选研究

Study on Screening Natural Enemies of Walnut Trunk Borer Pest Batocera horsfieldi in Qianbei Area

在黔北地区核桃林内,根据云斑天牛的生长环境及发育特点分卵期、低龄幼虫及核桃树皮下危害期、大龄幼虫及核桃树蛀干危害期、成虫期,对核桃树云斑天牛的天敌进行观察收集。解剖并收集受害解剖木段中的各种昆虫,统计各种昆虫的数量,对云斑天牛的致死、致病情况进行调查。结果表明,云斑天牛幼虫天敌共计13种,包括花绒寄甲、寄生蜂、阎甲及四斑露尾甲等寄生性天敌昆虫以及蜘蛛、蜈蚣、白蛆、蛞蝓及啄木鸟等其他天敌。

In the walnut forest of Qianbei area,according to the growth environment and development characteristics of Batocera horsfieldi,the natural enemies of Batocera horsfieldi were observed and collected from aspects including the egg stage,young larvae and walnut bark endangered period,older larvae and walnut tree trunk borer endurance period,adult stage.Various insects in the dissected anatomical section were dissected and collected,and the numbers of various insects were counted,the lethal and pathogenic conditions of Batocera horsfieldi were investigated.The results showed that there were 13 species of natural enemy insects,which contained parasitic natural enemy insect such as Dastarcus helophoroides(Fairmaire),parasitoid,histeridae,Librodor japonicus and so on,and other natural enemies including spiders,slugs,white slugs,slugs and woodpeckers etc.