State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agriculture Science, Beijing, China.
Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, China.
Pest Manag Sci. 2024 Sep;80(9):4650-4664. doi: 10.1002/ps.8183. Epub 2024 May 22.
The beet webworm, Loxostege sticticalis, a worldwide pest of many crops, performs a seasonal migration, causing periodic outbreaks in Asia, Europe and North America. Although long-distance migration is well documented in China, patterns of transboundary migration among China, Russia and Mongolia are largely unknown. We performed a phase analysis of L. sticticalis periodic outbreaks among three countries based on 30 years of historical population data, analyzed the wind systems during migration over boundary regions, and traced the migratory routes in a case study of outbreaks in 2008 by trajectory simulation.
Highly synchronized outbreak years of L. sticticalis were observed between China and Mongolia, China and eastern Siberia, China and western Siberia, Mongolia and eastern Siberia, eastern Siberia and western Siberia from 1978 to 2008, indicating possible transboundary migration between these regions. Winds at 300-600 m altitude, where adult migration usually occurs, also showed a high probability of northwestern winds in Haila'er (China), Chita (Russia) and Choybalsan (Mongolia), favoring successful adult migration from these areas to northern and northeastern China. Back trajectory analysis further showed that the first-generation adults that caused the severe outbreak of second-generation larvae in 2008 originated from eastern Siberia, eastern Mongolia, and the boundary regions of China-Russia and China-Mongolia.
Our findings demonstrated that the source of L. sticticalis outbreaks in northern China was closely related to the outbreaks in Siberia and Mongolia via long-distance transboundary windborne migration. This information will help guide international monitoring and management strategies against this notorious pest. © 2024 Society of Chemical Industry.
甜菜夜蛾，一种世界性的多种作物害虫，具有季节性迁徙行为，在亚洲、欧洲和北美洲造成周期性爆发。尽管在中国有长距离迁徙的详细记录，但中国、俄罗斯和蒙古之间的越境迁徙模式在很大程度上尚不清楚。我们根据 30 年的历史种群数据，对三个国家的甜菜夜蛾周期性爆发进行了相位分析，分析了迁徙过程中边界地区的风系，并通过轨迹模拟对 2008 年爆发的迁飞路线进行了案例研究。
1978 年至 2008 年，中国与蒙古、中国与东西伯利亚、中国与西西伯利亚、蒙古与东西伯利亚、东西伯利亚与西西伯利亚之间观察到甜菜夜蛾高度同步的爆发年份，表明这些地区之间可能存在越境迁徙。300-600 米高度的风（成虫迁徙通常发生在这个高度）在海拉尔（中国）、赤塔（俄罗斯）和乔巴山（蒙古）也显示出西北风的高概率，有利于这些地区的成虫成功迁徙到中国北部和东北部。回溯轨迹分析进一步表明，2008 年第二代幼虫严重爆发的第一代成虫起源于东西伯利亚、东蒙古以及中俄蒙边界地区。
我们的研究结果表明，中国北方甜菜夜蛾爆发的源头与西伯利亚和蒙古的爆发密切相关，是通过远距离越境风载迁徙造成的。这些信息将有助于指导针对这种臭名昭著的害虫的国际监测和管理策略。 © 2024 化学工业协会。
