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Fitness and cold tolerance of Spodoptera frugiperda fed on corn and two winter crops

文献类型： 外文期刊

作者： Qi, Xue-Wei 1 ; Hong, Lin 1 ; Chen, Jian 1 ; Liang, Yu-Yong 1 ;

作者机构： 1.Jiangxi Acad Agr Sci, Inst Plant Protect, Nanchang, Peoples R China

2.Jiangxi Acad Agr Sci, Inst Plant Protect, Nanchang 330200, Peoples R China

关键词： Brassica plants; cold tolerance; fitness; host selectivity; life cycle; Spodoptera frugiperda

期刊名称：JOURNAL OF APPLIED ENTOMOLOGY （ 影响因子：1.9； 五年影响因子：2.1 ）

ISSN： 0931-2048

年卷期： 2023 年

页码：

收录情况： SCI

摘要： Fall armyworm (FAW) Spodoptera frugiperda is a major migratory and polyphagous pest. Overwintering, migrating and colonizing characters of FAW are closely related to vegetation and host adaptation. In this study, we investigated oviposition preference, feeding preference of FAW, as well as fitness, cold tolerance of FAW larvae fed on spring and summer crop (corn) and two winter crops (cabbage, Brassica campestris and rape, B. napus). The results showed that FAW could complete their life cycle by feeding on cabbage and rape, although fitness was not as good as corn. FAW fed on cabbage had higher survival, female pupal mass and host suitability index than rape while larvae preferred to feed on rape leaves and females preferred to lay eggs on rape plants. In addition, FAW larvae fed on cabbage had the shortest recovery time from chill coma compared to corn and rape, indicating that cold tolerance of FAW larvae was improved by feeding on cabbage. Consequently, cabbage could be an ideal host for FAW which needed to survive and reproduce in winter. These results improve our understanding of host selection and adaption of FAW, as well as lay a foundation for predicting winter breeding areas of FAW.

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