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草地螟Loxostege sticticalis L.是危害我国北方农牧业的一种重要迁飞性害虫,明确草地螟的虫源地及迁飞路线对其早期预警具有重要意义。本文利用垂直监测昆虫雷达的长期观测,迁飞高峰期雌虫卵巢解剖、大区环流分析、各地虫情信息收集和利用Hysplit-4模型进行轨迹分析,研究了2007年越冬代草地螟的空中迁飞行为和东北地区严重暴发的草地螟虫源。结果表明:6月79日,雷达观测点诱虫灯内草地螟具有典型迁飞昆虫生理特征;草地螟主要在夜间迁飞,飞行高度集中在300~500m,400m是主要飞行高度,迁飞高峰期夜间迁移可持续9h。东北地区严重发生的草地螟虫源,一部分来自内蒙古乌盟地区,一部分来自蒙古共和国中东部及中俄边境地区。据此推测我国与国外草地螟存在虫源交流。
Grasshopper Loxostege sticticalis L. is an important migratory pest that endangers agriculture and animal husbandry in northern China. It is of great significance to clarify the origin and relocation of grass stem borer for its early warning. In this paper, long-term observations of vertically-oriented insect radars, ovarian anatomy of migratory females, regional circulation analysis, insect information collection and Hysplit-4 model trajectory analysis were conducted. The flight is a serious source of meadow borers in northeastern China. The results showed that the meadow moths had the typical migratory insects physiological characteristics on June 79, the fly moths mainly migrated at night, the flight altitude was concentrated in 300 ~ 500m, 400m was the main flight altitude, Period of night migration sustainable 9h. A serious occurrence of grass stem borers in northeast China originated from the Inner Mongolia Autonomous Region and partly from the Middle East of the Republic of Mongolia and the Sino-Russian border areas. Based on this, we speculated that there existed insect source exchanges between China and other countries.