Multiple herbicide-resistant horseweed (Conyza canadensis) dose response to tolpyralate and tolpyralate plus atrazine and comparison to industry standard herbicides in corn

Brendan A. Metzger; Nader Soltani; Alan J. Raeder

首页> 外文期刊>Weed Technology: A journal of the Weed Science Society of America >Multiple herbicide-resistant horseweed (Conyza canadensis) dose response to tolpyralate and tolpyralate plus atrazine and comparison to industry standard herbicides in corn

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Multiple herbicide-resistant horseweed (Conyza canadensis) dose response to tolpyralate and tolpyralate plus atrazine and comparison to industry standard herbicides in corn

机译：Multiple herbicide-resistant horseweed (Conyza canadensis) dose response to tolpyralate and tolpyralate plus atrazine and comparison to industry standard herbicides in corn

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Horseweed biotypes resistant to glyphosate and ALS-inhibiting herbicides are becoming more prevalent in Canada and the United States and present a significant management challenge in field crops. Tolpyralate is a recently commercialized herbicide foruse in corn that inhibits 4-hydroxyphenylpyruvate dioxygenase (HPPD), and there is little information regarding its efficacy on horseweed. Six field experiments were conducted in 2017 and 2018 at four locations in Ontario, Canada, to determine the biologically effective dose of tolpyralate and tolpyralate + atrazine and to compare label rates of tolpyralate and tolpyralate + atrazine to currently accepted herbicide standards for POST control of glyphosate and cloransulam-methyl resistant (MR) horseweed.At 8 wk after application (WAA), tolpyralate at 4.8 and 22.6 g ha~(-1) provided 50% and 80% control, respectively. When applied with atrazine at a 1:33.3 tank-mix ratio, 22.3 + 741.7 g ha~(-1) provided 95% control of MR horseweed. The addition of atrazine to tolpyralate at label rates improved control of MR horseweed to 98%, which was similar to the control provided by dicamba:atrazine and bromoxynil + atrazine. The results of this study indicate that tolpyralate + atrazine provides excellent control of MR horseweed POST in corn.

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《Weed Technology: A journal of the Weed Science Society of America》 |2019年第2期|366-373|共8页
作者
Brendan A. Metzger; Nader Soltani; Alan J. Raeder;
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作者单位

Graduate Student, Department of Plant Agriculture, University of Guelph, Ridgetown, ON, Canada;

Adjunct Professor, Department of Plant Agriculture, University of Guelph, Ridgetown, ON, Canada;

Herbicide Field Development and Technical Service Representative, ISK Biosciences Inc., Concord, OH, USA;

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正文语种英语
中图分类植物保护;
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Daniel Stephenson; Louisana State University Agricultural Center; Atrazine; bromoxynil; cloransulam-methyl; glyphosate; tolpyralate; horseweed; Conyza canadensis (L.) Cronq; field corn; Zea mays L; Herbicide resistance; Canada fleabane; no-till;

Multiple herbicide-resistant horseweed (Conyza canadensis) dose response to tolpyralate and tolpyralate plus atrazine and comparison to industry standard herbicides in corn

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