Nagoshi Rodney N, Fleischer Shelby, Meagher Robert L
Center for Medical, Agricultural and Veterinary Entomology, USDA-ARS, Gainesville, FL 32604, USA.
Environ Entomol. 2009 Dec;38(6):1546-54. doi: 10.1603/022.038.0605.
Fall armyworm, Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae), infestations in most of North America arise from annual migrations of populations that overwinter in southern Texas and Florida. Cytochrome oxidase I haplotype profiles within the fall armyworm corn strain, the subgroup that preferentially infests corn (Zea mays L.), can differentiate the Texas and Florida populations. We use this molecular metric to show that fall armyworms in central Pennsylvania originate from Texas, indicating the existence of a migratory pathway from Texas to the northeastern United States. These results were compared with historical trapping data for fall armyworm and another migratory noctuid, corn earworm Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae), in the Pennsylvania and Maryland corn-producing areas to better define lepidopteran migratory pathways.
草地贪夜蛾，即草地贪夜蛾（J. E. 史密斯）（鳞翅目：夜蛾科），在北美大部分地区的虫害是由在得克萨斯州南部和佛罗里达州越冬的种群每年迁徙造成的。在草地贪夜蛾玉米品系（优先侵染玉米（Zea mays L.）的亚组）中，细胞色素氧化酶I单倍型图谱可以区分得克萨斯州和佛罗里达州的种群。我们利用这一分子指标表明，宾夕法尼亚州中部的草地贪夜蛾起源于得克萨斯州，这表明存在一条从得克萨斯州到美国东北部的迁徙路径。将这些结果与宾夕法尼亚州和马里兰州玉米产区草地贪夜蛾以及另一种迁徙性夜蛾——玉米穗虫棉铃虫（博迪）（鳞翅目：夜蛾科）的历史诱捕数据进行比较，以更好地确定鳞翅目昆虫的迁徙路径。
