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Plant volatiles drive Spodoptera frugiperda behavioral preference to sweet corn

文献类型： 外文期刊

作者： Christian Neckie Natt;Chaoqun Yi;Longfei Shi;Ruonan Li;Adel Khashaveh;Wentao Liu;Yongjun Zhang

作者机构：

关键词： behavioral ecology;electroantennogram recording;host preference;Spodoptera frugiperda;volatile organic compounds

期刊名称： Frontiers in Ecology and Evolution

ISSN：

年卷期： 2025 年 13 卷

页码：

收录情况： SCIE（2025版）

摘要： The Fall Armyworm (FAW), Spodoptera frugiperda, is a globally significant invasive lepidopteran pest responsible for severe crop damage, particularly to maize (Zea mays). In this study, we investigated the preference of FAW larvae and adults for regular corn (RC) versus sweet corn (SC) using a two-choice behavioral assay. Potential semiochemicals underlying this preference were isolated and identified through headspace volatile collection coupled with Solid-Phase Microextraction–Gas Chromatography–Mass Spectrometry (SPME-GC-MS). The behavioral activity of identified differential volatile compounds was then comprehensively evaluated using electroantennography (EAG), a Y-tube olfactometer, and cage-based oviposition preference tests. Our results demonstrate that FAW larvae exhibit a significant feeding preference for SC leaves, while adult females show a marked oviposition preference for SC plants. Volatile profiling revealed four compounds consistently expressed at higher levels in SC compared to RC: hexanal, trans-2-hexen-1-ol, linalool, and β-caryophyllene. EAG recordings indicated that trans-2-hexen-1-ol elicited the strongest antennal response in FAW adults. In behavioral assays, FAW larvae showed significant attraction to all four volatiles at concentrations of 10 and 100 mg/mL. Similarly, adults exhibited significant preference for most compound-concentration combinations, with the exception of linalool at 100 mg/mL. The volatile compounds identified in SC present promising candidates for use in behavior-based disruption techniques, offering a more environmentally benign alternative to conventional insecticides for FAW control. These findings provide a scientific foundation for developing volatile-mediated strategies as part of integrated pest management programs against this invasive pest.

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