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Spodoptera litura larvae are attracted by HvAV-3h-infected S. litura larvae-damaged pepper leaves

文献类型： 外文期刊

作者： Ming, Lang 1 ; Du, Yuan-Wen 1 ; Yuan, Ge-Ge 1 ; Su, Qi 3 ; Shi, Xiao-Bing 4 ; Yu, Huan 1 ; Chen, Gong 1 ;

作者机构： 1.Hunan Agr Univ, Hunan Prov Key Lab Biol & Control Plant Dis & Inse, Changsha 410128, Hunan, Peoples R China

2.Hunan Agr Univ, Coll Plant Protect, Changsha 410128, Hunan, Peoples R China

3.Yangtze Univ, Coll Agr, Jingzhou, Hubei, Peoples R China

4.Hunan Acad Agr Sci, Hunan Plant Protect Inst, Changsha, Hunan, Peoples R China

关键词： pepper; HIPVs; Heliothis virescens ascovirus; behavioral responses; Spodoptera litura

期刊名称：PEST MANAGEMENT SCIENCE （ 影响因子：4.1； 五年影响因子：4.4 ）

ISSN： 1526-498X

年卷期： 2023 年 79 卷 8 期

页码：

收录情况： SCI

摘要： BackgroundHerbivore-induced plant volatiles (HIPVs) are important self-defense outputs of pepper plants to resist insect pests. Ascoviruses are pathogenic to the larvae of most lepidopteran vegetable pests. However, whether Heliothis virescens ascovirus 3h (HvAV-3h)-infected Spodoptera litura larvae can change pepper leaf HIPVs is not well understood. RESULTSSpodoptera litura larvae preferred S. litura-infested leaves, and this preference was stronger with longer duration of S. litura infestation. In addition, S. litura larvae significantly chose pepper leaves damaged by HvAV-3h-infected S. litura over the healthy pepper leaves. Results also showed that S. litura larvae preferred leaves mechanically damaged and treated with oral secretions from HvAV-3h infected-S. litura larvae in a simulation test. We captured the volatiles emitted by leaves under six treatments. Results showed that the volatile profile changed with the different treatments. Testing of volatile blends, prepared to the proportion released showed that the blend from simulated HvAV-3h-infected S. litura larvae-damaged plants was the most attractive to S. litura larvae. Further, we also found that some of the compounds significantly attracted S. litura larvae at specific concentrations. CONCLUSIONHvAV-3h-infected S. litura can alter the release of HIPVs in pepper plants and thus become more attractive to S. litura larvae. We speculate that this may be due to alterations in the concentration of some compounds (such as geranylacetone and prohydrojasmon) affecting the behavior of S. litura larvae. (c) 2023 Society of Chemical Industry.

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