在玉米播种前施用双氟磺草胺的生物有效剂量以控制对多种除草剂产生抗性的水麻

IF 1.3 3区农林科学 Q3 AGRONOMY

Weed Technology Pub Date : 2024-06-03 DOI:10.1017/wet.2024.42

N. Soltani, C. Willemse, P. Sikkema

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引用次数: 0

摘要

水麻是一种雌雄异株的物种，具有广泛的遗传多样性，使其能够对北美常用的几类除草剂（G）产生抗性。在安大略省进行了五项田间试验，以确定除草定的生物有效剂量（BED）。除草定是一种新的第 12 组除草剂，用于玉米萌芽前（PRE）控制对多种除草剂（MHR）具有抗性的水麻。根据回归分析，预测吡氟草胺能控制 50%、80% 和 95% MHR 水麻的剂量分别为：在 2 WAA 施用时为 99、225 和 417 g ai ha-1；在 4 WAA 施用时为 73、169 和 314 g ai ha-1；在 8 WAA 施用时为 76、215 和"-"（有效剂量超出了本研究的剂量范围）g ai ha-1。在 8 WAA 时，导致 MHR 水麻密度下降 50%、80% 和 95%的吡氟草胺剂量分别为 42、123 和"-"克 ai ha-1，MHR 水麻生物量分别为 72、167 和 310 克 ai ha-1。在 2、4 和 8 WAA 期，150 g ai ha-1 的 Diflufenican PRE 对 MHR 水草的控制率分别为 64%、79% 和 73%；105 + 1060 g ai ha-1 的 isoxaflutole + atrazine PRE 对 MHR 水草的控制率分别为 98%、98% 和 97%；1259/140/35/588 g ai ha-1 的 S-metolachlor/mesotrione/bicyclopyrone/atrazine PRE 对 MHR 水草的控制率分别为 100%、100% 和 99%。Diflufenican PRE 可将 MHR 水麻的密度和生物量降低 83%；相比之下，异噁唑草酮 + 阿特拉津和 S-甲草胺/甲草胺/双环吡喃酮/阿特拉津可将 MHR 水麻的密度和生物量降低 99%。所有评估的处理都不会对玉米造成伤害或伤害极小，产量与无杂草对照相当。结果表明，与常用的除草剂异噁唑禾草灵 + 阿特拉津或 S-甲草胺/甲草胺/双环嘧啶酮/atrazine 相比，单独使用除草定（PRE）不能更好地控制 MHR waterhemp；不过，作为杂草综合管理（IWM）策略的一部分，除草定有可能用于控制玉米中的 MHR waterhemp。

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Biologically effective dose of diflufenican applied preemergence for the control of multiple herbicide-resistant waterhemp in corn

Waterhemp is a dioecious species which contributes to a wide genetic diversity that has enabled it to evolve resistance to several commonly used Herbicide Groups (G) in North America. Five field trials were established in Ontario to ascertain the biologically effective doses (BED) of diflufenican, a new Group 12 herbicide applied preemergence (PRE) for control of multiple herbicide-resistant (MHR) waterhemp in corn. Based on regression analysis, the predicted diflufenican doses to elicit 50, 80, and 95% MHR waterhemp control were 99, 225, and 417 g ai ha-1 at 2 WAA; 73, 169, and 314 g ai ha-1 at 4 WAA, and 76, 215, and “–“ (the effective dose was beyond the set of doses in this study) g ai ha-1 at 8 WAA, respectively. The diflufenican doses that caused a 50, 80, and 95% decrease in MHR waterhemp density were 42, 123, and ”–“ g ai ha-1, and MHR waterhemp biomass were 72, 167, and 310 g ai ha-1, respectively at 8 WAA. Diflufenican PRE at 150 g ai ha-1 controlled MHR waterhemp 64, 79, and 73%; isoxaflutole + atrazine PRE at 105 + 1060 g ai ha-1 controlled MHR waterhemp 98, 98, and 97%; and S-metolachlor/mesotrione/bicyclopyrone/atrazine PRE at 1259/140/35/588 g ai ha-1 controlled MHR waterhemp 100, 100, and 99% at 2, 4, and 8 WAA, respectively. Diflufenican PRE reduced MHR waterhemp density and biomass by 83%; in contrast, isoxaflutole + atrazine and S-metolachlor/mesotrione/bicyclopyrone/atrazine reduced MHR waterhemp density and biomass by 99%. All treatments evaluated caused either no or minimal corn injury and provided yield comparable to weed-free control. Results indicate that diflufenican applied PRE alone does not provide superior MHR waterhemp control than the commonly used herbicides isoxaflutole + atrazine or S-metolachlor/mesotrione/bicyclopyrone/atrazine; however, there is potential for the utilization of diflufenican as a part of an Integrated Weed Management (IWM) strategy for the control of MHR waterhemp control in corn.

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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