Identification, mapping, and chemical control of fleabane resistant to glyphosate, chlorimuron, paraquat and 2,4-D

IF 1.3 3区农林科学 Q3 AGRONOMY

Weed Technology Pub Date : 2024-02-29 DOI:10.1017/wet.2024.10

Juliano Bortoluzzi Lorenzetti, Maikon Tiago Yamada Danilussi, Alfredo Junior Paiola Albrecht, Arthur Arrobas Martins Barroso, Leandro Paiola Albrecht, André Felipe Moreira Silva, Guilherme Rossano dos Santos, Giuzeppe Augusto Maram Caneppele

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引用次数: 0

Abstract

Monitoring herbicide-resistant weeds makes it possible to study the evolution and spread of resistance, providing important information for management. The objective of this study was to map fleabane accessions in the states of Paraná (PR) and Mato Grosso do Sul (MS), Brazil, to identify herbicide-resistant accessions and their response to soybean pre-plant chemical burndown management strategies. Fleabane seeds were collected in agricultural areas in PR and MS, in 2018, 2019, and 2020. Initial screening was performed for glyphosate, chlorimuron, paraquat, 2,4-D, saflufenacil, and glufosinate efficacy. Subsequently, dose-response experiments were conducted. Field experiments were carried out in three locations, where accessions of multiple-resistant Sumatran fleabane were identified. Herbicides were used in single or sequential (seq.) applications at three plant heights (<5 cm, 5 to 10 cm, and >10 cm). After preliminary screening, accessions were classified as putative resistant (<80% control for all 4 replicates), segregated (<80% control for 1 to 3 replicates), or susceptible (>80% control for all 4 replicates). There was no evidence of resistance to glufosinate or saflufenacil in any of the 461 accessions, while 65 showed possible resistance or segregation only for glyphosate, 235 for glyphosate + chlorimuron, 79 to glyphosate + chlorimuron + paraquat, 59 to glyphosate + chlorimuron + 2,4-D, and 23 with 4-way resistance (glyphosate, chlorimuron, paraquat and 2,4-D). Of these 23 accessions, 7 were analyzed using dose-response curves (F2 generation), all from PR, confirming 4-way resistance to glyphosate, chlorimuron, paraquat, and 2,4-D. To control resistant Sumatran fleabane, an application should prioritize smaller plants. Despite resistance to 2,4-D, double mixtures containing this herbicide were among the most effective treatments in plants <5 cm in height. Sequential application is needed for plants >5 cm in height, it was recommended glyphosate + synthetic auxin followed by glufosinate or glyphosate + saflufenacil.

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对草甘膦、氯嘧磺隆、百草枯和 2,4-D 产生抗性的飞燕草进行鉴定、绘图和化学防治

通过监测抗除草剂杂草，可以研究抗药性的演变和传播，为管理提供重要信息。本研究的目的是绘制巴西巴拉那州（Paraná）和南马托格罗索州（Mato Grosso do Sul）的飞蓬品种图，以确定抗除草剂品种及其对大豆播种前化学除草管理策略的反应。2018 年、2019 年和 2020 年，在巴拉圭和南马托格罗索州的农业区采集了飞燕草种子。对草甘膦、氯嘧磺隆、百草枯、2,4-D、氟虫腈和草铵膦的药效进行了初步筛选。随后，进行了剂量反应实验。在三个地点进行了田间试验，确定了具有多重抗性的苏门答腊飞燕草品种。除草剂在三种植株高度（5 厘米、5 至 10 厘米和 10 厘米）下单次或连续施用。经过初步筛选，加入的品种被归类为推定抗性（所有 4 个重复的控制率均为 80%）、分离抗性（1 至 3 个重复的控制率均为 80%）或易感抗性（所有 4 个重复的控制率均为 80%）。在 461 个品种中，没有任何一个品种对草铵膦或氟虫腈产生抗性，65 个品种可能只对草甘膦产生抗性或分离，235 个品种对草甘膦+氯嘧磺隆产生抗性，79 个品种对草甘膦+氯嘧磺隆+百草枯产生抗性，59 个品种对草甘膦+氯嘧磺隆+2,4-D 产生抗性，23 个品种产生 4 种抗性（草甘膦、氯嘧磺隆、百草枯和 2,4-D）。在这 23 个品种中，有 7 个品种利用剂量反应曲线（F2 代）进行了分析，这些品种均来自 PR，确认了对草甘膦、氯嘧磺隆、百草枯和 2,4-D 的 4 向抗性。要控制抗性苏门答腊飞蓬，施药时应优先考虑较小的植株。尽管 2,4-D 具有抗药性，但含有这种除草剂的双效混合物是对高度为 5 厘米的植物最有效的处理方法之一。对于高度为 5 厘米的植株，需要按顺序施药，建议先施用草甘膦+合成助剂，再施用草铵膦或草甘膦+氟虫腈。

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来源期刊

Weed Technology 农林科学-农艺学

CiteScore

2.90

自引率

21.40%

发文量

审稿时长

12-24 weeks

期刊介绍： Weed Technology publishes original research and scholarship in the form of peer-reviewed articles focused on understanding how weeds are managed. The journal focuses on: - Applied aspects concerning the management of weeds in agricultural systems - Herbicides used to manage undesired vegetation, weed biology and control - Weed/crop management systems - Reports of new weed problems -New technologies for weed management and special articles emphasizing technology transfer to improve weed control -Articles dealing with plant growth regulators and management of undesired plant growth may also be accepted, provided there is clear relevance to weed science technology, e.g., turfgrass or woody plant management along rights-of-way, vegetation management in forest, aquatic, or other non-crop situations. -Surveys, education, and extension topics related to weeds will also be considered