Characterization of core maize volatiles induced by Spodoptera frugiperda that alter the mating-mediated approach-avoidance behaviors of Mythimna separata  

作　　者：Denghai Yang Hengzhe Fan Ruyi Hu Yong Huang Chengwang Sheng Haiqun Cao Bin Yang Xingchuan Jiang 

机构地区：[1]Anhui Province Key Laboratory of Crop Integrated Pest Management/Key Laboratory of Biology and Sustainable Management of Plant Diseases and Pests of Anhui Higher Education Institutes,College of Plant Protection,Anhui Agricultural University,Hefei 230036,China [2]State Key Laboratory for Biology of Plant Diseases and Insect Pests,Institute of Plant Protection,Chinese Academy of Agricultural Sciences,Beijing 100193,China

出　　处：《Journal of Integrative Agriculture》2025年第2期655-667,共13页农业科学学报(英文版)

基　　金：supported by the National Key Research and Development Program of China(2021YFD1400700);the Natural Science Foundation of Anhui Province,China(2308085MC89);the Agricultural Science and Technology Innovation Program of Chinese Academy of Agricultural Sciences(ASTIP)。

摘　　要：The fall armyworm(Spodoptera frugiperda)is an invasive species and a destructive pest of maize,which significantly impacts native species and communities via complex mechanisms like competition for resources.However,the interaction between S.frugiperda and local pests remains unclear.In this study,we determined that Oriental armyworm(Mythimna separata)females with different mating status displayed different approach-avoidance behaviors towards maize which was infested by S.frugiperda larvae.The virgin M.separata females were repelled,while the mated females were attracted by the S.frugiperda-infested maize.To further understand the olfactory mechanism of this phenomenon,seven volatiles induced by S.frugiperda in maize were characterized by gas chromatography and mass spectrometry(GC-MS),including trans-2-hexenal,linalool,trans-β-farnesene,cis-3-hexenyl acetate,β-caryophyllene,trans-α-bergamotene,and isopentyl acetate.Additionally,electrophysiological and behavioral assays of the seven compounds were performed using both virgin and mated females of M.separata.We determined that virgin and mated females displayed different responses to the herbivore-induced plant volatile(HIPV).Trans-β-farnesene was the core compound for repelling virgin females,and trans-2-hexenal was the key attractant for oviposition in mated female M.separata individuals.These findings help our comprehension of the relationships between maize pests and offer new possibilities for controlling them by olfactory-based strategies.

关 键 词：chemical ecology mating behavior ATTRACTANTS REPELLENTS HIPVs plant volatiles 

分 类 号：S435.132[农业科学—农业昆虫与害虫防治]