我国草地贪夜蛾迁飞路径及其发生区划 |
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引用本文:陈辉,武明飞,刘杰,谌爱东,姜玉英,胡高.我国草地贪夜蛾迁飞路径及其发生区划.植物保护学报,2020,47(4):747-757 |
DOI:10.13802/j.cnki.zwbhxb.2020.2020811 |
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中文摘要:为明确草地贪夜蛾Spodoptera frugiperda在我国的迁飞路径和发生区划,基于2014—2018年历史气象资料,利用轨迹分析方法和有效积温模型模拟该虫在我国的迁飞过程和发育进度。结果显示,我国草地贪夜蛾发生区可划分为4个区域:一是华南南部9~12代区,即常年越冬区,大致在1月10℃等温线以南地区,包括广东、广西、云南、福建、台湾等省区南部以及海南岛,除了本地越冬种群外,3、4月不断有境外虫源迁入;二是长江以南6~8代区,包括长江以南大部分区域以及云南省大部、贵州省东南部,该区域3月即可出现成虫迁入,主迁入期为4、5月;三是黄淮海及西南3~5代区,包括江淮、黄淮地区、华北平原、四川盆地和贵州省大部,其中黄河以南地区4、5月开始由长江以南地区零星迁入,主迁入期为5、6月,而黄河以北地区全年发生3~4代,主迁入期为7月;四是北方1~2代区,包括甘肃省东部、宁夏回族自治区、陕西、山西和河北等省北部、内蒙古自治区南部以及东北地区,该区域7月才出现成虫迁入。本研究所模拟的我国草地贪夜蛾迁飞过程和时空分布范围,可为该虫的监测预警方案和防控策略制订提供理论参考。 |
中文关键词:草地贪夜蛾 轨迹分析 有效积温模型 越冬区 迁飞路径 |
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Migratory routes and occurrence divisions of the fall armyworm Spodoptera frugiperda in China |
Author Name | Affiliation | E-mail | CHEN Hui | Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China | | WU Mingfei | Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China | | LIU Jie | China National Agro-Tech Extension and Service Center, Beijing 100125, China | | CHEN Aidong | Agricultural Environment and Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming 650205, Yunnan Province, China | | JIANG Yuying | China National Agro-Tech Extension and Service Center, Beijing 100125, China | | HU Gao | Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China | hugao@njau.edu.cn |
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Abstract:The fall armyworm (FAW) Spodoptera frugiperda, an invasive pest from America, invaded China at the end of 2018, which may become a serious threat to food security. In order to design strategies to monitor and control this pest, it is urgent to identify the migration routes, timing of seasonal movements, and seasonal distribution of FAW in eastern China. In this study, the migration and development processes were modelled using a trajectory analytical approach combined with a degree-day model. The modelling results showed that the occurrence area of FAW in China could be divided into four regions: (i) The southern part of South China, i.e., the overwintering area of FAW, where FAW can complete 9-12 generations in one year. This part is located roughly south of the 10℃ isotherm in January, including Hainan Island, and the southern parts of Guangdong, Guangxi, Yunnan, Fujian and Taiwan provinces (autonomous regions). In addition to the local overwintering population, there may be lots of immigrants from Indochina countries in March and April. (ii) Most areas to the south of the Yangtze River, and Yunnan and southeastern Guizhou as well, where FAW can complete 6-8 generations. Here FAW moths appear as early as March, but most immigrants arrive in April and May. (iii) Huang-Huai-Hai Plain, Sichuan Basin and most Guizhou, where FAW can complete 3-5 generations in one year. Among these regions, the Huang-Huai-Hai Plain covers a large area to the north of the Yangtze River in eastern China, including the reaches of Huai, Huang and Hai rivers. Moths migrate from the south of the Yangtze River into the area between the Yangtze and Huang rivers in April—June, and the peak of immigration appears in May and June. To the north of the Huang River, the migrants arrive in July or later, and can only complete 3-4 generations in one year. (iv) Northern China area, where FAW can complete one or two generations, including eastern Gansu, Ningxia, the northern parts of Shaanxi, Shanxi and Hebei provinces, southern Inner Mongolia, and northeastern China. In this part, FAW mostly arrives in July or later. Information on migration pathways and timings can be used to enhance the integrated pest management of this emerging pest. |
keywords:Spodoptera frugiperda trajectory analytical approach degree-day model overwintering area migration pathway |
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