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Migration of invasive Spodoptera frugiperda(Lepidoptera:Noctuidae)across the Bohai Sea in northern China

Journal of Integrative Agriculture 2021年第3期20卷 685-693页

作者： JIA Hui-ru GUO Jiang-long WU Qiu-lin HU Chao-xing LI Xiao-kang ZHOU Xian-yong WU Kong-ming State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193P.R.China College of Plant Protection Shenyang Agricultural UniversityShenyang 110866P.R.China Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Region Institute of EntomologyGuizhou UniversityGuiyang 550025P.R.China College of Plant Protection Southwest UniversityChongqing 400716P.R.China

The fall armyworm(FAW),Spodoptera frugiperda(***),is an important agricultural pest with a strong migratory *** the species is native to the Americas,it has recently invaded China,ravaging crops in many provinces(autonomous regions,municipalities).Its long-distance migration,which is critical to understand for pest management programs,has been well studied in its native *** other regions however,the moth’s migration patterns have not yet been ***,the migratory behavior of FAW populations in China was studied on an isolated island located in the center of the Bohai Strait from spring to autumn 2019,the year in which FAW first reached this region,by using searchlight trapping,stable carbon isotopes and trajectory *** main results were summarized as follows:(i)The number of FAW moths caught by searchlight trapping provided direct evidence that the species migrated across the Bohai Sea.(ii)Species identification was confirmed by both morphology and molecular methods,and only the"corn-strain"that preferentially infests maize and sorghum was found in the collections.(iii)Stable carbon isotope measurements showed that up to 95.07%of captured moths displayed the C4 isotope signature,thus providing additional evidence that this species is a migrant as there are no major C4 plants at the trapping site.(iv)Backward trajectory analysis indicated that the pest now threatens to expand its range into the agriculturally important region of Northeast China,and thus authorities in this region should be vigilant to the threat posed by this ***,these findings add to our knowledge concerning the occurrence of FAW in northern China,and will help us to develop sustainable and effective monitoring,forecasting,and pest management strategies.

关键词： Spodoptera frugiperda overseas migration searchlight trapping host strains stable carbon isotopes migration trajectory

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