Migration Monitoring and Route Analysis of the Oriental Armyworm Mythimna separata (Walker) in Northeast China

The oriental armyworm Mythimna separata (Walker) is a worldwide migratory pest that threatens food security in China. Previous studies have clarified the general migration regularity of M. East Asia, but knowledge routes over northeast China, especially autumn as well impact by climate change recent years, still limited. From 2017 to 2020, we monitored China searchlight traps and simulated moth trajectories HYSPLIT model. moths had three main periods there were obvious seasonal differences at different latitudes. spring summer migrants (late May early-mid June late July early August) came from southern Shandong Province migrated north via Hebei/Shandong-Liaoning-Jilin-Heilongjiang. Moreover, more than half trapped insects August mid-late September provinces where sites are located, southward Heilongjiang-Jilin-Liaoning. These results route their relationship with insect source thereby providing theoretical basis for regional monitoring, warning, management pest.