稻纵卷叶螟2010年的一次迁飞过程及其虫源分析  

Analysis of a migration process and the source population of Cnaphalocrocis medinalis (Guenée) (Lepidoptera: Pyralidae) in 2010

作　　者：齐国君[1] 芦芳[2] 高燕[1] 梁居林 蓝日青 张孝羲[2] 翟保平[2] 吕利华[1] 

机构地区：[1]广东省农业科学院植物保护研究所,广州510640 [2]南京农业大学植物保护学院,农作物生物灾害综合治理教育部重点实验室,南京210095 [3]封开县农作物病虫测报站,广东封开526537 [4]广东省韶关市农业科学研究所,广东韶关512005

出　　处：《昆虫学报》2011年第10期1194-1203,共10页Acta Entomologica Sinica

基　　金：国家公益性行业(农业)科研专项(200903051)

摘　　要：2010年6月10-12日,我国华南、江南南部稻区出现了稻纵卷叶螟Cnaphalocrocis medinalis(Guenée)的大范围同期突增。为了明确此次同期突增的虫源性质,进一步揭示稻纵卷叶螟大规模降落的大气动力学机制,我们利用HYSPLIT轨迹分析平台、地理信息系统ArcGIS和气象图形软件GrADS,对稻纵卷叶螟的迁飞过程及大气背景场进行了个例研究。结果表明:(1)粤北大范围的稻纵卷叶螟突增以外地迁入种群为主,部分为本地繁殖种群;(2)西南低空急流为稻纵卷叶螟的远距离迁飞提供了运载气流,稻纵卷叶螟迁飞种群的集中降落是降雨造成的,主降区位于雨区边缘的曲江、紫金、佛冈等地区,降雨区的空间分布直接导致了曲江、南雄地区降虫量的巨大差别;(3)稻纵卷叶螟迁入峰的主要虫源地分布在广东西南部稻区,6月上旬以阳春为代表的虫源地的双季早稻进入扬花灌浆期-乳熟期,叶片营养恶化,稻纵卷叶螟处于成虫盛发期,存在为粤北大规模迁入提供虫源的可能。A typical great migration event of rice leaf folder, Cnaphalocrocis medinalis （Guenée）, occurred in rice region of southern China and south part of southern Yangtze River during June 10-12, 2010. In order to illustrate the population characteristics of the pest and further reveal the atmospheric dynamic mechanisms of large-scale immigration of C. medinalis, the migration process of C. medinalis and the atmospheric backgrounds that influenced the landing process were analyzed by using HYSPLIT, a trajectory analysis software for the simulation of migration trajectories, GIS （Geographic Information System） and GrADS （Grid Analysis and Display System）. We obtained the following results： （1） The population of C. medinalis in northern Guangdong resulted mainly from immigrations, but supplemented by a little local breeding. （2） Southwest of strong low-level jets carried large-scale invasions of C. medinalis into Guangdong. The involuntary landing populations of C. medinalis were caused by rainfall, the immigrants of C. medinalis landed obviously on the marginal rainfall zone such as Qujiang District, Zijin County and Fogang Couty, and the differences of the spatial distribution of the rainfall zone directly resulted in the significant differences of C. medinalis population densities that landed at Qujiang District and Nanxiong City. （3） Simulations of migration trajectories indicated that most of the immigrants came from south-western Guangdong. The double-cropped early season rice of this area with Yangchun City as the representative was in the reproductive stage in early June （flowering and filling stage to milk stage）, which was deteriorative for C. medinalis as food, so this area could provide a great amount of emigration moths of C. medinalis to form the large-scale invasion into northern Guangdong.

关 键 词：稻纵卷叶螟 迁飞 虫源性质 低空急流 轨迹分析 虫源地 

分 类 号：Q968[生物学—昆虫学]