Seasonal migration dynamics of the rice leaf folder Cnaphalocrocis medinalis across the South China Sea
文献类型： 外文期刊
作者： Zhou, Xianyong 1 ; Yan, Ran 2 ; Liu, Dazhong 1 ; Jia, Huiru 1 ; Li, Xiaokang 3 ; Cang, Xinzhu 1 ; Lv, Yaobin 1 ; Wu, Kongming 2 ;
作者机构： 1.Xianghu Lab, Hangzhou 311258, Peoples R China
2.Chinese Acad Agr Sci, State Key Lab Biol Plant Dis & Insect Pests, Inst Plant Protect, Beijing 100193, Peoples R China
3.Shenyang Agr Univ, Coll Plant Protect, Shenyang 110866, Peoples R China
关键词：
期刊名称：JOURNAL OF PEST SCIENCE （ 影响因子：4.1； 五年影响因子：5.0 ）
ISSN： 1612-4758
年卷期： 2025 年
页码：
收录情况： SCI
摘要： The rice leaf folder (RLF), Cnaphalocrocis medinalis, is an important migratory pest of rice in Southeast Asia and East Asia. However, its migration dynamics are not well-understood. In this study, we investigated RLF migration across the South China Sea from 2017 to 2024 using a searchlight trapping, stable isotope analysis, ovarian dissection and trajectory modeling. Our work shows how RLF migration occurs year-round, with peak migration from September to October. The proportion of sexually mature and mated females gradually increases over time. Trajectory analyses further show that successive RLF generations primarily migrate northward in the spring-summer season and then engage in return flight during autumn and winter. Lastly, stable isotope analyses uncover how RLF larvae primarily feed on C3 plants in the spring and summer, but on C4 plants during winter. By unveiling key aspects of RLF migration in Southeast Asia and East Asia, our study lays the necessary groundwork for multi-country surveillance programs, early warning systems and improved 'area-wide' management of this limiting rice pest.
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