Effect of a near-zero magnetic field on development and flight of oriental armyworm(Mythimna separata)  

作　　者：AN Meng-meng ZHANG Lei CHENG Yun-xia Thomas W.SAPPINGTON PAN Wei-dong JIANG Xing-fu 

机构地区：[1]State Key Laboratory for Biology of Plant Disease and Insect Pests,Institute of Plant Protection,Chinese Academy of Agricultural Sciences,Beijing 100193,P.R.China [2]Corn Insects and Crop Genetics Research Unit,USDA-ARS,Ames,IA 50011,USA [3]Beijing Key Laboratory of Bioelectromagnetics,Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,P.R.China

出　　处：《Journal of Integrative Agriculture》2021年第5期1336-1345,共10页农业科学学报（英文版）

基　　金：the earmarked fund for China Agriculture Research System(CARS-22);the National Key Research and Development Program of China(2017YFD0201802 and 2017YFD0201701);the National Natural Science Foundation of China(31672019,31870367 and 31871951);the Beijing Municipal Natural Science Foundation,China(6172030)。

摘　　要：The geomagnetic field affects all living organisms on the Earth.In this study we investigated the developmental and behavioral effects of rearing Mythimna separata in a near-zero magnetic field(<500 n T)compared to the local geomagnetic field(approximately 50μT).The near-zero magnetic field produced by a Helmholtz coil system significantly lengthened larval and pupal development durations,increased male longevity,and reduced pupal weight,female reproduction,and the relative expression level of the vitellogenin(Vg)gene in newly emerged females.Moreover,the near-zero magnetic field had a considerable negative effect on the mating ratio of M.separata adults.In addition,the moths in the near-zero magnetic field displayed less flight activity late in the night than those in the Earth's normal geomagnetic field,indicating that the flight rhythm of M.separata may be affected by the near-zero magnetic field.Reduction in magnetic field intensity may have negative effects on the development and flight of oriental armyworm,with consequent additional effects on its migration.

关 键 词：DEVELOPMENT flight activity geomagnetic field Mythimna separata near-zero magnetic field 

分 类 号：S433.4[农业科学—农业昆虫与害虫防治]