一项为期 4 年的田间研究，监测在玉米不同轮作和除草剂方案下，Echinochloa crus-galli 群体中抗 Trp574Leu 植物的进化情况。

IF 3.8 1区农林科学 Q1 AGRONOMY

Pest Management Science Pub Date : 2024-07-15 DOI:10.1002/ps.8315

Joel Torra, German Mora, José María Montull, Aritz Royo-Esnal, Jean Sébastien Notter, Marisa Salas

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引用次数: 0

摘要

背景：一项为期 4 年的实验评估了不同的杂草综合管理（IWM）方案对玉米种植系统中对乙酰乳酸合成酶（ALS）抑制剂产生抗性的 Echinochloa crus-galli 种群进化的影响。这些计划包括继续使用 ALS 抑制剂、将其与替代除草剂混合使用或不使用 ALS 抑制剂，所有情况下均采用玉米单作或两年轮作：完全依赖非 ALS 抑制剂的 IWM 项目通常在各年都能达到很高的控制水平（大于 90%）。此外，在仅使用 ALS 抑制剂的项目中，抗 Trp574Leu 植物变得普遍（> 90%），而在其他项目中，易感植物的频率并未大幅下降至 40% 以下。至于其他受监测的禾本科杂草，在使用 ALS 抑制剂但不轮作大豆的方案中，或在完全不使用 ALS 抑制剂的方案中，Digitaria sanguinalis 和 Panicum dichotomiflorum 都得到了有效控制，只有在玉米单作下使用 4-hydroxyphenylpyruvate dioxygenase (HPPD) 抑制剂的方案中，后一种杂草的控制率为 0%：试验结束时，唯一能降低侵染水平的 IWM 方案是大豆轮作下不使用 ALS 抑制剂的方案，以及使用标准萌芽前处理的方案。这些发现凸显了轮作和替代除草剂在芽前或芽后控制 E. crus-galli 的有效性。ALS抑制剂虽然在E. crus-galli中面临抗药性的挑战，但仍然是管理玉米中其他禾本科杂草的重要工具。关键是要针对耐除草剂的 E. crus-galli 和其他禾本科杂草种群调整 IWM 策略，以减少抗药性的进一步演变。© 2024 Corteva Agriscience。害虫管理科学》由 John Wiley & Sons Ltd 代表化学工业协会出版。

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A 4-year field study monitoring the evolution of Trp574Leu-resistant plants in an Echinochloa crus-galli population under different crop rotation and herbicide programs in maize

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A 4-year field study monitoring the evolution of Trp574Leu-resistant plants in an Echinochloa crus-galli population under different crop rotation and herbicide programs in maize

BACKGROUND

A 4-year experiment evaluated the effects of different integrated weed management (IWM) programs on the evolution of a Echinochloa crus-galli population resistant to acetolactate synthase (ALS) inhibitors in a maize cropping system. The programs included the continued use of ALS inhibitors, mixing them with alternative herbicides, or without ALS-inhibitors, in all cases under maize monocrop or a biennial crop rotation.

RESULTS

IWM programs that relied solely on non-ALS-inhibitors usually achieved high control levels across years (> 90%). Additionally, Trp574Leu-resistant plants became prevalent (> 90%) in programs only using ALS inhibitors, while in the rest the frequency of susceptible plants did not substantially decrease below 40%. Regarding the other monitored grass weeds, Digitaria sanguinalis and Panicum dichotomiflorum were effectively controlled in programs using ALS-inhibitors without soybean rotation or in programs without ALS-inhibitors altogether, excepting the program relying on an 4-hydroxyphenylpyruvate dioxygenase (HPPD)-inhibitor under maize monocrop for the latter species (0%).

CONCLUSION

At the end of the experiment, the only IWM programs that reduced infestation levels were the one without ALS-inhibitors under soybean rotation, and the one with standard pre-emergence treatments. These findings highlight the effectiveness of crop rotation and alternative herbicides both pre- or post-emergence in controlling E. crus-galli. ALS-inhibitors, while challenged by resistance in E. crus-galli, remain valuable tools for managing other grass weed species in maize. It is crucial to adapt IWM strategies for herbicide-resistant E. crus-galli and other grass weed populations to mitigate the further evolution of resistance. © 2024 Corteva Agriscience. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

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来源期刊

Pest Management Science 农林科学-昆虫学

CiteScore

7.90

自引率

9.80%

发文量

553

审稿时长

4.8 months

期刊介绍： Pest Management Science is the international journal of research and development in crop protection and pest control. Since its launch in 1970, the journal has become the premier forum for papers on the discovery, application, and impact on the environment of products and strategies designed for pest management. Published for SCI by John Wiley & Sons Ltd.