Evaluating cover crop tolerance to corn residual herbicides using field treated soil in greenhouse bioassay

IF 1.3 3区农林科学 Q3 AGRONOMY

Weed Technology Pub Date : 2023-10-12 DOI:10.1017/wet.2023.72

Tatiane Severo Silva, Nicholas John Arneson, Daniel Valadão Silva, Rodrigo Werle

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引用次数: 0

Abstract

Abstract More growers across the US Midwest are considering interseeding or overseeding cover crops into corn for soil health purposes. One challenge of this practice is the potential injury from soil residual herbicides applied preemergence (PRE) for weed control in corn to the interseeded and overseeded cover crop species. Field treated soil was collected in 2021 and 2022 at Janesville and Lancaster, WI to investigate the impact of PRE residual herbicides on establishment of interseeded and overseeded cover crops via greenhouse bioassay. Soil samples (0-5 cm depth) were collected from field experiments at 0, 10, 20, 30, 40, 50, 60, and 70 days after treatment (DAT). Treatments consisted of 14 single and multiple sites of action PRE herbicides plus a nontreated check (NTC). Four bioindicator cover crop species were used in the greenhouse bioassay: annual ryegrass, cereal rye, radish, and red clover. Cover crop biomass was collected 28 days after bioassay seeding. Cover crop species responded differently across herbicide treatments. Annual ryegrass and cereal rye were sensitive to treatments containing herbicide group 15, whereas groups 2, 4, 5, 14, and 27 had minimal impact on their establishment when field soil was collected at 30 DAT (interseeding scenario) and 70 DAT (overseeding scenario) compared to the NTC. Radish and red clover were sensitive to herbicide groups 2, 4, and 27, whereas groups 5, 14, and 15 had minimal impact on their establishment. Annual ryegrass, radish, and red clover were more sensitive to PRE herbicides containing two and three sites of action than herbicides with a single site of action. Based on these greenhouse bioassay results, cover crop species should be carefully selected depending on the soil residual herbicide when interseeded and overseeded into corn. Field studies will be conducted to validate these results and support recommendations to growers interested in this system.

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温室生物试验中利用田间处理土壤评价覆盖作物对玉米残留除草剂的耐受性

美国中西部越来越多的种植者正在考虑在玉米中间种或过度播种覆盖作物，以达到土壤健康的目的。这种做法的一个挑战是玉米苗期前施用土壤残留除草剂对间种和过度播种覆盖作物的潜在危害。研究人员于2021年和2022年在威斯康星州的简斯维尔和兰开斯特收集了田间处理过的土壤，通过温室生物试验研究PRE残留除草剂对间种和过种覆盖作物的影响。在处理后0、10、20、30、40、50、60和70天(DAT)从田间试验中采集土壤样品(深度0-5 cm)。处理包括14个单位点和多位点作用PRE除草剂加一个未处理检查(NTC)。采用一年生黑麦草、谷物黑麦、萝卜和红三叶草4种生物指示剂覆盖作物进行温室生物测定。生物试验播种后28 d采集覆盖作物生物量。覆盖作物对不同除草剂处理的反应不同。一年生黑麦草和谷物黑麦对15组除草剂敏感，而2、4、5、14和27组除草剂对其生长的影响最小，当田间土壤在30 DAT(间播)和70 DAT(过播)时收集。萝卜和红三叶草对除草剂2、4、27组敏感，而5、14、15组对其生长影响最小。一年生黑麦草、萝卜和红三叶草对含有两个和三个作用位点的PRE除草剂比含有一个作用位点的除草剂更敏感。根据这些温室生物试验结果，在玉米间种和过量播种时，应根据土壤残留除草剂的情况仔细选择覆盖作物品种。将进行实地研究，以验证这些结果，并支持对该系统感兴趣的种植者的建议。

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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