Control of Annual Weeds with Glyphosate

Krausz, Ronald F.; Kapuśta, George; Matthews, Joseph L.

doi:10.1017/s0890037x00041087

Cited by 74 publications

(93 citation statements)

References 34 publications

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“…Selective foliar-applied herbicides generally are effective up to about the four to six leaf stage. Amaranthus species also can be controlled readily by non-selective herbicides, such as glyphosate, glufosinate, and paraquat (Krausz et al 1996;Jordan et al 1997;Coetzer et al 2002). There is little evidence of differential response to herbicides among A. retroflexus, A. powellii or A. hybridus, although differences in response to various herbicides among other species in the genus have been noted (Mayo et al 1995;Sweat et al 1998).…”

Section: Response To Herbicides and Other Chemicalsmentioning

confidence: 99%

The biology of Canadian weeds. 130. Amaranthus retroflexus L., A. powellii S. Watson and A. hybridus L.

Costea¹,

Weaver²,

Tardif³

2004

Can. J. Plant Sci.

153

108

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The three species are noxious weeds introduced to Canada from southern North America. Their geographical distribution has remained almost unchanged since the original paper published in 1980. The plants exhibit a high phenotypic plasticity and genetic variability and they easily adapt to a multitude of agrestal and ruderal habitats. The seeds contribute to a persistent seed bank; they exhibit a variable dormancy and polymorph germination as a result of maternal, genetic and environmental factors. Growth is rapid and plants produce a large number of viable seeds. The three species have developed multiple resistance to triazine and acetolactate-synthase-inhibiting herbicides. They are alternate hosts to many insects, nematodes, viruses, bacteria and fungi that affect cultivated plants.

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Section: Response To Herbicides and Other Chemicalsmentioning

confidence: 99%

The biology of Canadian weeds. 130. Amaranthus retroflexus L., A. powellii S. Watson and A. hybridus L.

Costea¹,

Weaver²,

Tardif³

2004

Can. J. Plant Sci.

153

108

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show abstract

“…In general, all glyphosate treatments provided efficient control of tumble pigweed with both the LASC and broadcast sprayers. Glyphosate is reported to be an effective herbicide treatment for the control of pigweed species (Corbett et al 2004;Culpepper and York 1999;Krausz et al 1996). Glyphosate alone at the lowest rate (840 g ha…”

Section: Resultsmentioning

confidence: 99%

Symposium Long-term weed management studies in the Pacific Northwest

Young

2004

Weed Science

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The winter wheat production system of the Pacific Northwest is characterized by severe wind and water erosion and winter annual grass weeds requiring high herbicide input. Since 1985, numerous multi- and interdisciplinary, long-term, large-scale, integrated cropping systems studies have been or are currently being conducted. The primary focus of these studies was on weed biology, ecology, and management, whereas secondary evaluations were on alternative cropping systems, conservation tillage, and fertilizer or herbicide inputs. The 6-yr integrated pest management project, conducted in the high-rainfall zone (> 400 mm), showed for the first time that when weeds were adequately managed, conservation production systems were more profitable than conventional systems. In the intermediate rainfall zone (350 to 400 mm), a recently concluded 6-yr, three-state study integrated single-component research results into a multifaceted approach to managing jointed goatgrass. This project has been used as a model study for other western states and the National Jointed Goatgrass Research Initiative. At present (9 yr thus far), a study is being conducted in the low-rainfall zone (< 350 mm) to examine the feasibility of no-till spring cropping systems in lieu of the highly erosive, weed infested, wheat–fallow system. Because of these projects, the Washington Wheat Commission recognized the importance of long-term, interdisciplinary, cropping systems research and has therefore established an Endowed Chair at Washington State University for direct seed cropping systems research. Federal, national, and regional agencies have used information from these projects for farm plans and pesticide usage.

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“…However, at the 10-to 15-cm height, common lambsquarters and giant foxtail control occasionally improves (Gower et al 2002). Common lambsquarters control using glyphosate has also been found to be greater with an EP herbicide application compared with a LP herbicide application (Krausz et al 1996). Glufosinate applied at 0.42 kg ai ha À1 may control 10-cm common lambsquarters better than 5-cm common lambsquarters (Steckel et al 1997a).…”

Section: Post Herbicide Comparison Common Lambsquarters Control Was mentioning

confidence: 98%

Evaluation of Application Program and Timing in Herbicide-Resistant Corn

et al. 2012

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Field studies were conducted from 2007 to 2009 in East Lansing, MI to evaluate three residual herbicide programs, three POST herbicide application timings, and two POST herbicides in glyphosate- and glufosinate-resistant corn. Herbicide programs included a residual PRE-applied herbicide followed by (fb) POST application (residual fb POST), a residual herbicide tank-mixed with a POST herbicide (residual + POST), and a nonresidual POST. Three POST herbicide application timings included early POST (EP), mid-POST (MP), and late POST (LP) at an average corn growth stage of V3/V4, V4/V5, and V5/V6, respectively. The two POST herbicides evaluated were glyphosate and glufosinate. Control of common lambsquarters and giant foxtail was evaluated 28 d after the LP application. Glyphosate often provided greater weed control than glufosinate. The LP application resulted in greater giant foxtail control compared with the EP application timing, which may be attributed to control of late-emerging weeds. The EP application timing improved common lambsquarters control compared with the LP application timing. The residual + POST program resulted in greater weed control compared with the residual fb POST program in all years. The effect of residual herbicide program, POST herbicide, and POST application timing on corn grain yield varied by year. In 2007, the use of glyphosate resulted in higher grain yield compared with glufosinate. In 2008, corn grain yield was the highest in the PRE fb POST program and with POST applications at EP and MP. To provide the most consistent weed control and minimize the likelihood of grain yield reductions, a PRE fb POST program applied at EP or MP is recommended.

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Control of Annual Weeds with Glyphosate

Cited by 74 publications

References 34 publications

The biology of Canadian weeds. 130. Amaranthus retroflexus L., A. powellii S. Watson and A. hybridus L.

The biology of Canadian weeds. 130. Amaranthus retroflexus L., A. powellii S. Watson and A. hybridus L.

Symposium Long-term weed management studies in the Pacific Northwest

Evaluation of Application Program and Timing in Herbicide-Resistant Corn

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