论文部分内容阅读
美国白蛾为世界性园林检疫害虫。自1979年辽宁省丹东地区发现美国白蛾以来,尽管采取了一些措施,加强了防治和检疫工作,但疫区的范围仍在继续扩大蔓延,目前大连市、山东半岛的荣城县也已发生。因此,加强检疫方法的研究,有效地控制其扩散,是当前美国白蛾防治工作中急待解决的问题。美国白蛾的传播途径很多,卵、幼虫、蛹和成虫均能随人为活动、木材调运、寄主植物、货物及工具的运输向外扩散传播。据我们几年来调查的情况表明,以木材携带蛹向外传播扩散的危险性最大。因为美国白蛾喜欢在开裂的树皮下、树洞中及木材缝隙处化蛹越夏或越冬,而且越冬蛹的持续时间可长达8个月之久。因此,加强蛹期的检疫工作是控制其随木材的调运向外扩散的重要环节。我们于1983年夏季在辽宁省凤城县林业局贮木场进行了蛹期原木帐幕熏蒸除害处理试验。
American white moth is a worldwide garden quarantine pest. Since the discovery of the American white moth in Dandong, Liaoning Province in 1979, despite the measures taken to strengthen prevention and quarantine work, the scope of the affected areas is still expanding and spreading. At present, Rongcheng County in Dalian and Shandong Peninsula has also occurred . Therefore, to strengthen the research on quarantine methods and control their spread effectively is the urgent problem to be solved in the control of the white moth in the United States. The United States has many ways to spread the white moth, eggs, larvae, pupae and adults can with human activities, timber transportation, the host plant, the spread of goods and tools to spread out. According to our investigations over the past few years, the danger of spreading pupae out of wood is greatest. Because American white moth like to under the cracked bark, tree holes and wood crevice pupation summer or wintering, and overwintering pupa duration of up to 8 months. Therefore, to strengthen the quarantine of pupal stage is to control its distribution with the wood out of an important part of the spread. In the summer of 1983, we carried out the fumigation and fumigation treatment of the virgin logs in the storage yard of Forestry Bureau of Fengcheng County, Liaoning Province.