The occurrence of herbicide-resistant Avena fatua (wild oats) populations to ACCase-inhibiting herbicides in Ireland

IF 0.9 4区农林科学 Q3 AGRICULTURE, MULTIDISCIPLINARY

Irish Journal of Agricultural and Food Research Pub Date : 2021-06-03 DOI:10.15212/IJAFR-2020-0127

R. Byrne, A. Bhaskar, J. Spink, R. Freckleton, P. Neve, S. Barth

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引用次数: 2

Abstract

Following growers’ reports of herbicide control problems, populations of 30 wild oats, Avena fatua, were collected from the south-east main arable counties of Ireland in 2016 and investigated for the occurrence and potential for herbicide resistance to acetyl-CoA carboxylase (ACCase) inhibitors pinoxaden, propaquizafop and cycloxydim, as well as acetolactate synthase (ALS) inhibitor mesosulfuron + iodosulfuron. Plant survival ≥20% was considered as the discriminating threshold between resistant and susceptible populations, when plants were treated with full recommended field rates of ACCase/ALS inhibitors. Glasshouse sensitivity screens revealed 2 out of 30 populations were cross-resistant to all three ACCase inhibitors. While three populations were cross-resistant to both pinoxaden and propaquizafop, and additionally, two populations were resistant to propaquizafop only. Different degree of resistance and cross-resistance between resistant populations suggest the involvement of either different point mutations or more than one resistance mechanism. Nevertheless, all populations including the seven ACCase-resistant populations were equally susceptible to ALS inhibitor. An integrated weed management (cultural/non-chemical control tactics and judicious use of herbicides) approach is strongly recommended to minimize the risk of herbicide resistance evolution.

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爱尔兰抗除草剂燕麦种群对ACC酶抑制剂的发生情况

根据种植者关于除草剂控制问题的报告，2016年，从爱尔兰东南部主要耕地县收集了30种野生燕麦Avena fatua，并调查了其对乙酰辅酶A羧化酶（ACCase）抑制剂皮诺沙登、原奎扎福和环氧啶的除草剂抗性的发生和潜力，以及乙酰乳酸合成酶（ALS）抑制剂中磺隆+碘磺隆。当用ACCase/ALS抑制剂的完全推荐田间率处理植物时，≥20%的植物存活率被认为是抗性和易感群体之间的区分阈值。玻璃屋敏感性筛选显示，30个种群中有2个对所有三种ACC酶抑制剂具有交叉耐药性。三个群体同时对皮诺沙登和喹唑磷具有交叉抗性，另外，两个群体仅对喹唑磷有抗性。抗性群体之间不同程度的抗性和交叉抗性表明存在不同的点突变或多种抗性机制。然而，包括7个ACC酶抗性群体在内的所有群体对ALS抑制剂都同样敏感。强烈建议采用综合杂草管理（栽培/非化学控制策略和明智使用除草剂）方法，以最大限度地降低除草剂耐药性演变的风险。

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来源期刊

Irish Journal of Agricultural and Food Research 农林科学-农业综合

CiteScore

2.50

自引率

20.00%

发文量

审稿时长

>36 weeks

期刊介绍： The Irish Journal of Agricultural and Food Research is a peer reviewed open access scientific journal published by Teagasc (Agriculture and Food Development Authority, Ireland). Manuscripts on any aspect of research of direct relevance to Irish agriculture and food production, including plant and animal sciences, food science, agri environmental science, soils, engineering, buildings, economics and sociology, will be considered for publication. The work must demonstrate novelty and relevance to the field of research. Papers published or offered for publication elsewhere will not be considered, but the publication of an abstract does not preclude the publication of the full paper in this journal.