草地螟迁飞、降落与东北冷涡的关系

利用2009年6月内蒙古自治区植保站的草地螟越冬代成虫标记放飞和捕获试验结果，结合2009年6月每日08时和20时500-1000 hPa高空天气图、每日8次的地面天气图等气象信息，分析2009年内蒙古自治区草地螟盛发期自然放飞并回收到的标记成虫的放飞与天气系统的关系。结果表明：草地螟成虫放飞后卷入东北冷涡并随其在控制区内沿逆时针方向旋转的气流飞行，其迁飞方向与天气系统密切相关；气流方向、降水和风力等气象因子是影响草地螟成虫迁飞与降落的主要原因，分析气象因子与草地螟迁飞和降落的关系，有利于进一步认识草地螟在盛发期的迁飞习性；分析草地螟主动降落迁入的气象条件和相关预警指标，对监测草地螟成虫迁入有重要指导意义。

Relationship of northeast cold vortex with migration and landing of Loxostege sticticalis (Ls)

Based on a migration and capture experiment of marked adults of Loxostege sticticals (Ls) in plant protect station of Inner Mongolia autonomous region on June of 2009, relationship between mark-release-recapture (MRR) of overwinter-generation adults and weather system was analyzed by using information from daily upper synoptic maps (500-1000 hPa isobaric surface maps at 08:00 and 20:00 on June of 2009) and surface synoptic maps with 8 times per day. The results indicate that adults of Ls are involved into northeast cold vortices and fly with air flow along anticlockwise direction in control region after they are released, and their migration direction is close related to weather system. Meteorological factors such as airflow direction, precipitation and wind-speed significantly influence migration and landing of Ls adults. Analysis of both relationships is favorable to understand migratory habits of Ls at the age of fulminant period, while analysis of meteorological conditions of Ls active landing and moving and corresponding early warning index plays an important role in the process of monitoring migration of Ls adults.