The botanical eurycomanone is a potent growth regulator of the diamondback moth

文献类型： 外文期刊

第一作者： Shao, Xuehua

作者： Shao, Xuehua;Lai, Duo;Xiao, Weiqiang;Kuang, Shizi;Yan, Ying;Yang, Weiqun;Yang, Weiqun;Yan, Ying

作者机构：

关键词： Antifeedant; Growth inhibition; Diamondback moth; GABA(A) receptor; Systemic

期刊名称：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY （ 影响因子：6.291； 五年影响因子：6.393 ）

ISSN： 0147-6513

年卷期： 2021 年 208 卷

页码：

收录情况： SCI

摘要： Eurycomanone is a quassinoid compound that is derived from Eurycoma longifolia, and it is often used as an indicator to evaluate the active ingredients of Eurycoma longifolia. However, Eurycomanone has rarely been reported to have biological activity toward pests. In this study, we evaluated the antifeedant activity of eurycomanone against the diamondback moth(Plutella xylostella), with a non-selective AFC(50)(the concentration that corresponds to 50% antifeedant action) value and selective AFC(50) of 17.5 mg/L and 14.2 mg/L, respectively, which were 2.1-fold (36.9 mg/L) and 2-fold (28.5 mg/L) lower than that of azadirachtin, respectively. In addition, eurycomanone was used to treat the roots of Brassica chinensis L. at a concentration of 100 mu g/g for 72 h. The antifeedant index was found to reach 93% by tracking the leaves. After feeding with 20 mu g/g eurycomanone, no pupae or eclosion were observed. To explore this mechanism, we used scanning electron microscopy to discover that eurycomanone could prevent the development of taste receptors on the maxillary palp of diamondback moth larvae. Additional electrophysiological measurements showed that eurycomanone exhibited excitatory action to the central taste neurons of diamondback moth and significantly inhibited the GABAA receptor current. Eurycomanone exhibited significant activity as an antifeedant, inhibited growth and excelled at systemic absorption.

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