Seasonal Migratory Activity of the Beet Armyworm <i>Spodoptera exigua</i> (Hübner) in the Tropical Area of China
The beet armyworm <i>Spodoptera exigua</i> (Hübner), a global pest, feeds on and affects a wide range of crops. Its long-distance migration with the East Asian monsoon frequently causes large-scale outbreaks in East and Southeast Asia. This pest mainly breeds in tropical regions in the w...
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MDPI AG
2024-12-01
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| Series: | Insects |
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| author | Xudong Wang Qing Feng Xianyong Zhou Haowen Zhang Shaoying Wu Kongming Wu |
| author_facet | Xudong Wang Qing Feng Xianyong Zhou Haowen Zhang Shaoying Wu Kongming Wu |
| author_sort | Xudong Wang |
| collection | DOAJ |
| description | The beet armyworm <i>Spodoptera exigua</i> (Hübner), a global pest, feeds on and affects a wide range of crops. Its long-distance migration with the East Asian monsoon frequently causes large-scale outbreaks in East and Southeast Asia. This pest mainly breeds in tropical regions in the winter season every year; however, few studies have investigated associations with its population movements in this region. From 2017 to 2023, we monitored its population dynamics in a tropical site, located in Hainan Province of China, using a searchlight trap. Dissection of the ovaries of female <i>S. exigua</i> moths captured from the air revealed that most of them were reproductively mature and could be classified as a transit migratory population. Migration occurred most often in summer and least often in winter, with an increasing trend over the years. According to a trajectory model analysis based on the Weather Research and Forecasting (WRF) model, <i>S. exigua</i> migrated from Hainan Island to mainland China in the spring, primarily moved from the areas of Southeast Asia to Hainan and mainland China during the summer, and returned from China to Southeast Asia in the autumn and winter. Overall, our research defines the movement paths of <i>S. exigua</i> in the tropical area of China, establishing a theoretical foundation for its regional monitoring, early warning, and management in China and Southeast Asian countries. |
| format | Article |
| id | doaj-art-37bf86c337704591bbf7e925ecba9589 |
| institution | DOAJ |
| issn | 2075-4450 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Insects |
| spelling | doaj-art-37bf86c337704591bbf7e925ecba95892025-08-20T02:53:19ZengMDPI AGInsects2075-44502024-12-01151298610.3390/insects15120986Seasonal Migratory Activity of the Beet Armyworm <i>Spodoptera exigua</i> (Hübner) in the Tropical Area of ChinaXudong Wang0Qing Feng1Xianyong Zhou2Haowen Zhang3Shaoying Wu4Kongming Wu5School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, ChinaCollege of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, ChinaThe State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, ChinaThe State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, ChinaSchool of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, ChinaThe State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, ChinaThe beet armyworm <i>Spodoptera exigua</i> (Hübner), a global pest, feeds on and affects a wide range of crops. Its long-distance migration with the East Asian monsoon frequently causes large-scale outbreaks in East and Southeast Asia. This pest mainly breeds in tropical regions in the winter season every year; however, few studies have investigated associations with its population movements in this region. From 2017 to 2023, we monitored its population dynamics in a tropical site, located in Hainan Province of China, using a searchlight trap. Dissection of the ovaries of female <i>S. exigua</i> moths captured from the air revealed that most of them were reproductively mature and could be classified as a transit migratory population. Migration occurred most often in summer and least often in winter, with an increasing trend over the years. According to a trajectory model analysis based on the Weather Research and Forecasting (WRF) model, <i>S. exigua</i> migrated from Hainan Island to mainland China in the spring, primarily moved from the areas of Southeast Asia to Hainan and mainland China during the summer, and returned from China to Southeast Asia in the autumn and winter. Overall, our research defines the movement paths of <i>S. exigua</i> in the tropical area of China, establishing a theoretical foundation for its regional monitoring, early warning, and management in China and Southeast Asian countries.https://www.mdpi.com/2075-4450/15/12/986<i>Spodoptera exigua</i>migration trajectoryovary developmentregional management |
| spellingShingle | Xudong Wang Qing Feng Xianyong Zhou Haowen Zhang Shaoying Wu Kongming Wu Seasonal Migratory Activity of the Beet Armyworm <i>Spodoptera exigua</i> (Hübner) in the Tropical Area of China Insects <i>Spodoptera exigua</i> migration trajectory ovary development regional management |
| title | Seasonal Migratory Activity of the Beet Armyworm <i>Spodoptera exigua</i> (Hübner) in the Tropical Area of China |
| title_full | Seasonal Migratory Activity of the Beet Armyworm <i>Spodoptera exigua</i> (Hübner) in the Tropical Area of China |
| title_fullStr | Seasonal Migratory Activity of the Beet Armyworm <i>Spodoptera exigua</i> (Hübner) in the Tropical Area of China |
| title_full_unstemmed | Seasonal Migratory Activity of the Beet Armyworm <i>Spodoptera exigua</i> (Hübner) in the Tropical Area of China |
| title_short | Seasonal Migratory Activity of the Beet Armyworm <i>Spodoptera exigua</i> (Hübner) in the Tropical Area of China |
| title_sort | seasonal migratory activity of the beet armyworm i spodoptera exigua i hubner in the tropical area of china |
| topic | <i>Spodoptera exigua</i> migration trajectory ovary development regional management |
| url | https://www.mdpi.com/2075-4450/15/12/986 |
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