Topical exposure to (E)-β-farnesene alters behavior, reproduction, and wing dimorphism in the English grain aphid, Sitobion avenae (Hemiptera: Aphididae)

文献类型： 外文期刊

第一作者： Yan, Yi

作者： Yan, Yi;Zhang, Yunhui;Zhang, Bo;Yang, Chaoxia;Zhang, Fangmei;Wei, Changping;Zhu, Xun;Li, Xiangrui;Zhang, Fangmei;Zhou, Xuguo

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关键词： aphid alarm pheromone; behavioral response; wing differentiation; fecundity; sustainable aphid control

期刊名称：JOURNAL OF ECONOMIC ENTOMOLOGY （ 影响因子：2.4； 五年影响因子：2.4 ）

ISSN： 0022-0493

年卷期： 2025 年 118 卷 4 期

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收录情况： SCI

摘要： (E)-beta-farnesene (E beta F), a sesquiterpene widely recognized for its role in aphid alarm signaling, triggers escape behaviors and influences aphid population dynamics. Despite its potential as a biological control agent, the effects of E beta F on the English grain aphid Sitobion avenae (Fabricius) (Hemiptera: Aphididae), a major wheat pest, remain insufficiently explored. In this study, we topically applied E beta F at a concentration gradient (10 to 1,000 ng/mu l) to various developmental stages of S. avenae and assessed their behavioral responses, development, reproduction, and winged offspring ratio under different population densities. Our results revealed that E beta F at 10 ng/mu l induced significant behavioral changes, including leg shaking, fast walking, and falling from host plants, across all developmental stages. Exposure to 200 ng/mu l E beta F significantly reduced fecundity by 19.6% and shortened lifespan by 17.8%, while increasing the proportion of winged offspring by 19.8%, particularly under low parental density combined with high offspring density. Field trials further revealed that a higher concentration of E beta F (1,000 ng/mu l) led to a 25% increase in the proportion of winged offspring compared to controls, with environmental factors such as population density influencing the response. These findings confirm the insecticidal and density-dependent effects of E beta F on S. avenae, with transgenerational impacts on wing dimorphism, highlighting its potential for the sustainable aphid control in wheat ecosystems.

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