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Evaluation of the fit of Tolpyralate for Weed Management in Field Corn (Zea mays L.) in Ontario

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dc.contributor.advisor Sikkema, Peter H. Langdon, Nicole M. 2020-04-24T21:01:09Z 2020-04-24T21:01:09Z 2020-04 2020-04-09 2020-04-24
dc.description.abstract Thirty-six experiments were conducted over two years (2018, 2019) to evaluate tolpyralate, a benzoylpyrazole 4-hydroxyphenyl-pyruvate dioxygenase inhibitor, for weed management in corn in Ontario. The importance of adjuvants (MSO and UAN) with tolpyralate + atrazine and the influence of Roundup Weathermax® was determined for control of nine annual weed species, glyphosate-resistant (GR) Canada fleabane and GR waterhemp. Optimal control was achieved with tolpyralate + atrazine + MSO and when tolpyralate + atrazine was co-applied with Roundup Weathermax®. Tolpyralate and tolpyralate + atrazine has residual activity on GR Canada fleabane, comparable to current industry standards. Three weed species exhibited a time-of-day effect to tolpyralate + atrazine, although, consistent control was achieved regardless of application time. Corn injury was greatest from tolpyralate + atrazine when applied at the 2X rate alone and/or co-applied with glyphosate at 1 WAA; there was no further increase in corn injury when co-applied with glyphosate. en_US
dc.language.iso en en_US
dc.subject tolpyralate en_US
dc.subject Canada Fleabane en_US
dc.subject waterhemp en_US
dc.subject adjuvants en_US
dc.subject weed control en_US
dc.title Evaluation of the fit of Tolpyralate for Weed Management in Field Corn (Zea mays L.) in Ontario en_US
dc.type Thesis en_US Plant Agriculture en_US Master of Science en_US
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