(1南京农业大学植物保护学院昆虫学系 农作物生物灾害综合治理教育部和农业部重点实验室南京210095；
2凤台县植保站凤台232100）摘要通过2009，2010年春季对江淮地区安徽凤台麦田及灯诱灰飞虱Laodelphax striatellus (Fallén)种群的系统调查和雌虫卵巢的系统解剖，明确了本地越冬后灰飞虱的种群性质，作为灰飞虱能否迁飞的判据；运用美国NOAA网站的HYSPLIT平台对本地的迁入高峰做了数值模拟和虫源分析。结果表明：（1）江淮稻区灰飞虱麦田种群的迁移动态为远距离迁飞与本地扩散相结合；（2）在本地范围内，灰飞虱的本地繁殖型长翅成虫于麦收前可从麦田向秧田迁移扩散，在不利于长翅成虫起飞进行远距离迁飞的天气条件，如降雨、大风等的影响下，麦田迁飞型种群可向附近的秧田扩散；(3)灯诱与田间长翅雌虫卵巢解剖表明本地2010年6月5日和12日出现迁入虫群；虫源轨迹分析显示2010年6月5日迁入虫峰来自苏中的扬州地区，6月12日迁入虫源来自鲁南济宁地区。
关键词灰飞虱， 春季迁飞， 本地扩散， 轨迹分析

Migration and dispersal of the small brown planthopper
Laodelphax striatellus (Fallén) in the Jianghuai region:
Case studies in Fengtai, Anhui Province in spring of 2009 and 2010 WANG Li1**HAN Chao1XU YanBo1CAI GuangCheng2SUN YouWu2
HU XueYou2ZHANG XiaoXi1ZHAI BaoPing1***
（1Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Integrated
Management of Crop Diseases and Insect Pests，Ministry of Education, Ministry of Agriculture of China, Nanjing210095, China;
2Fengtai Plant Protection Station, Fengtai232100, China)

AbstractIn order to clarify whether the 1st generation of the small brown planthopper (SBPH), Laodeolphax striatellus (Fallén) could undertake long distance migration in eastern China, the spring population properties of the 1st generation of this pest was studied in the Jianghuai region of Anhui Province through field surveys in wheat and rice seedling fields, lighttrap catches and ovarian dissection of macropterous females. The migration pathways of SBPH were simulated and analyzed by HYSPLIT, a NOAA trajectory analysis platform. The results were as follows: (1) The population displacement of SBPH in wheat fields during the end of spring included long distance migration between different regions and local dispersal within Jianghuai District. (2) SBPH dispersed to rice seedling plots from wheat fields just before wheat harvest, or when the aerial migration of macropterous individuals was prevented by weather conditions such as precipitation and strong winds. (3) There were two migratory peaks in the spring of 2010, 5th June and 12th June, respectively. Trajectory analysis showed that the population source areas of the former migration event were in Yangzhou, central Jiangsu Province, and the latter in Jining, in southern Shandong Province.
Key wordsLaodelphax striatellus，spring migration，local dispersal，trajectory analysis