Insecticidal activities of Salvia hispanica L. essential oil and combinations of their main compounds against the beet armyworm Spodoptera exigua

文献类型： 外文期刊

第一作者： Chen, Yijuan

作者： Chen, Yijuan;Luo, Jiaxuan;Jiang, Jiexian;Chen, Yijuan;Dai, Guanghui;Zhang, Nan;Yu, Wenjuan

作者机构：

关键词： Plant essential oil; α -Thujone; Toxicity; Synergy; Botanical insecticide

期刊名称：INDUSTRIAL CROPS AND PRODUCTS （ 影响因子：5.645； 五年影响因子：5.749 ）

ISSN： 0926-6690

年卷期： 2021 年 162 卷

页码：

收录情况： SCI

摘要： Plant essential oils are the powerful candidates to develop natural insect management agents. Their chemical compounds along with their biological activity are often affected by many factors. However, the relationships between the composition and bioactivity of the compounds are not well understood. In this study, eight plant essential oils were screened, and the main compounds from the most effective oil showing insecticidal properties against third-instar larvae of the beet armyworm (Spodoptera exigua Hubner) were evaluated for comparative and synergistic interactions by topical application. The results indicated that Salvia hispanica L. essential oil showed significant insecticidal activity against S. exigua compared with the other seven essential oils. Fifteen major compounds were identified from S. hispanica via gas chromatography-mass spectrometry, with the most abundant compound (alpha-thujone) possessing the highest insecticidal activity. Several combinations of the four major compounds (alpha-thujone, (+)-camphor, 1,8-cineole, and alpha-caryophyllene) from S. hispanica exhibited synergistic insecticidal activities. This study demonstrates the potential of S. hispanica essential oil and alpha-thujone as effective botanical insecticides in the control of beet armyworm and provides a better understanding of essential oil compound-pest interactions.

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