数字农科院2.0

The Threat of the Fall Armyworm to Asian Rice Production Is Amplified by the Brown Planthopper

文献类型： 外文期刊

作者： Xu, Shengliang;Hu, Xiaoyun;Liu, Yuexian;Wang, Xiaolong;Wang, Yanan;Li, Guoping;Turlings, Ted C. J.;Li, Yunhe

作者机构：

关键词： food security;host range expansion;Nilaparvata lugens;rice volatile;Spodoptera frugiperda

期刊名称： PLANT CELL AND ENVIRONMENT

ISSN： 0140-7791

年卷期： 2024 年

页码：

收录情况： SCIE（2024版）

摘要： The recent invasion of the fall armyworm (FAW) into Asia not only has had a major impact on maize yield but is feared to also pose a risk to rice production. We hypothesized that the brown planthopper (BPH) may aggravate this risk based on a recently discovered mutualism between the planthopper and the rice striped stem borer. Here we show that BPH may indeed facilitate a shift of FAW to rice. FAW females were found to strongly prefer to oviposit on BPH-infested rice plants, which emitted significantly elevated levels of five volatile compounds. A synthetic mixture of these compounds had a potent stimulatory effect on ovipositing females. Although FAW caterpillars exhibited relatively poor growth on both uninfested and BPH-infested rice, a considerable portion completed their development on young plants. Moreover, FAW were found to readily pupate and survive in exceedingly moist soils typical for rice cultivation, further highlighting FAW's potential to switch to rice. We conclude that BPH, by changing the bouquet of volatiles emitted by rice plants, may greatly facilitate this switch. These findings, together with a current increase of nonflooded upland rice in Asia, warrant careful monitoring and specific control measures against FAW to safeguard Asian rice production.

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