摘要
Dear Editor,The fall army worm,Spodoptera frugiperda(Lepidoptera:Noctuidae),a highly agricultural destructive pest of cereals,is originally rampant in tropical and subtropical America(Kenis et al.2019).The caterpillars of this moth feed on more than 350 plant species(Harrison et al.2019),including several economically important cultivated grasses such as maize,rice,sorghum and sugarcane,severely threatening the food security(Cock et al.2017).Spodoptera frugiperda is recognized to comprise two morphologically identical but genetically distinct strains with different host range.The"rice strain^R strain,RS)is thought to preferentially feed on rice and various pasture grasses,while the‘com strain,(C strain,CS)on maize,cotton and sorghum(Juarez et al.2012).Unable to tolerate freezing temperature,S.frugiperda is seldom reported outside of America.However,since its first detection in Nigeria in 2016,several congruent reports from African countries about sudden and severe upsurges of S.frugiperda raised the alarm that S.frugiperda is continuously expanding their range to become truly threat(Goergen et al.2016).
基金
This research was supported by the grant from the National Key R&D Program of China(2017YFD0200400).
