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

dc.contributor.advisorSikkema, Peter H.
dc.contributor.advisorRobinson, Darren E.
dc.contributor.authorMetzger, Brendan A.
dc.date.accessioned2019-01-10T17:14:55Z
dc.date.available2019-01-10T17:14:55Z
dc.date.copyright2019-01-10
dc.date.created2019-01-08
dc.date.issued2019-01-10
dc.degree.departmentDepartment of Plant Agricultureen_US
dc.degree.grantorUniversity of Guelphen_US
dc.degree.nameMaster of Scienceen_US
dc.degree.programmePlant Agricultureen_US
dc.description.abstractTwenty-seven field experiments were conducted from 2015-2018 at nine locations to evaluate tolpyralate, a new pyrazolone 4-hydroxyphenyl-pyruvate dioxygenase inhibitor, for weed management in corn. The biologically-effective dose of tolpyralate and tolpyralate + atrazine was established in eight common annual weed species, and separately in multiple herbicide-resistant (MR) Canada fleabane and waterhemp biotypes. Co-application of tolpyralate with atrazine improved weed control; tolpyralate + atrazine at label rates provided similar or improved control of eight common weed species, MR Canada fleabane and MR waterhemp compared to industry standards. Four weed species were controlled equally regardless of POST application timing and two species were controlled with tolpyralate + atrazine applied pre-emergence; annual grass control declined with delayed applications. Corn was at greatest risk of injury with tolpyralate + atrazine applied at V1 or V3, and at 2X rates. Injury was influenced by environmental variables, but did not translate to grain yield loss.en_US
dc.description.sponsorshipISK Biosciences Corporation
dc.description.sponsorshipGrain Farmers of Ontario
dc.description.sponsorshipGrowing Forward 2 Program
dc.identifier.urihttp://hdl.handle.net/10214/14765
dc.language.isoenen_US
dc.publisherUniversity of Guelphen_US
dc.rights.licenseAll items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated.
dc.subjectHPPD-inhibitorsen_US
dc.subjectdose-responseen_US
dc.subjectCanada fleabaneen_US
dc.subjectwaterhempen_US
dc.titleEvaluation of Tolpyralate for Weed Management in Field Corn (Zea mays L.)en_US
dc.typeThesisen_US

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