摘要
【目的】明确草地贪夜蛾Spodoptera frugiperda(J.E.Smith)迁入河南的路径和虫源地,为河南草地贪夜蛾的异地预测提供基础信息。【方法】根据2019和2020年河南省88个监测点的草地贪夜蛾高空灯诱蛾数据,借助基于WRF模式的昆虫轨迹分析方法,阐释河南草地贪夜蛾的迁入路径和虫源地。【结果】草地贪夜蛾经东、西两条迁飞路线迁入河南。东线主要从广东和江南丘陵区迁入河南,主迁入期在6-8月,8-9月也会有少量来自安徽、江苏的虫群迁入;西线为主要虫源区,从云贵高原经西南山地玉米种植区(包括川东、重庆、桂西、湘西、鄂西山地和陕南山地)迁入到河南中西部,最早4月就有源自广西的成虫迁入,主迁入峰集中在7-8月。特定天气系统和天气过程影响草地贪夜蛾迁入期的年际变化,2020年河南省草地贪夜蛾迁入峰期推迟,是因为当年6月中下旬江南长时间、大范围降水对迁出种群的阻滞作用。【结论】河南草地贪夜蛾的异地预测可用3月份广西、云南和4-5月份重庆、贵州、湖南的田间虫量作为迁入量的预测因子,用5-6月份湖南、湖北的发蛾期和6月份的降水作为迁入期的预测因子。
[Objectives]To clarify the immigration pattern and source population of the fall armyworm(FAW,Spodoptera frugiperda)in Henan province,and provide basic information for the allopatric forecasting of FAW.[Methods]Migration routes of FAW were tracked by trajectory analysis using the WRF4.0(Weather Research and Forecasting Model)and source areas of immigrants analyzed based on searchlight trap catches at 88 monitoring stations in Henan province in 2019 and 2020.[Results]Immigrants fly north along two paths;east and west.The eastern route mainly runs from Guangdong and south of Yangtze River provinces from June to August,with a few immigrants from Anhui and Jiangsu from August to September.The western route is the main source of populations invading Henan province.These depart from the southwestern,mountainous,corn belt,including the Yunnan-Guizhou Plateau,eastern Sichuan,Chongqing,western Guangxi,western Hunan and Hubei and southern Shaanxi,and fly 1-3 nights to arrive in central and western Henan in July and August.Weather can cause annual fluctuations in the timing of immigration of the FAW to Henan Province.A case study revealed that long-term and heavy precipitation south of the Yangtze River during mid-to-late June 2020 retarded the takeoff of source populations in southern China,postponing the arrival of immigrants in Henan.[Conclusion]The density of field populations of FAW in Guangxi and Yunnan in March,and in Chongqing,Guizhou and Hunan in April and May,can be used to predict the number of immigrants that will arrive in Henan.The emergence period in Hunan and Hubei during May and June,and the rainfall in June,are also predictive factors for the arrival of FAW in Henan province.
作者
孙旭军
张国彦
刘一
王新媛
胥付生
杜桂枝
冯贺奎
耿丰华
张秋红
胡高
翟保平
SUN Xu-Jun;ZHANG Guo-Yan;LIU Yi;WHANG Xin-Yuan;XU Fu-Sheng;DU Gui-Zhi;FENG He-Kui;GENG Feng-Hua;ZHANG Qiu-Hong;HU Gao;ZHAI Bao-Ping(College of Plant Protection,Nanjing Agricultural University,Nanjing 210095,China;Henan Plant Protection and Plant Quarantine Station,Zhengzhou 450002,China;Yancheng Plant Protection and Plant Quarantine Station,Luohe 462000,China;Huaiyang Plant Protection and Plant Quarantine Station,Huaiyang 466700,China;Pingyu Plant Protection and Plant Quarantine Station,Pingyu 463400,China;Zhenping Plant Protection and Plant Quarantine Station,Zhenping 474200,China;Changge Plant Protection and Plant Quarantine Station,Changge 461500,China)
出处
《应用昆虫学报》
CAS
CSCD
北大核心
2021年第3期579-591,共13页
Chinese Journal of Applied Entomology
基金
NSFC-河南联合基金(U1904201)
国家重点研发计划(2019YFD0300102)。
关键词
草地贪夜蛾
轨迹分析
迁入路径
虫源地
Spodoptera frugiperda
trajectory analysis
migratory routes
source areas of immigrants
