Lateral Movement of Herbicides on Golf Course Fairways and Effects on Bentgrass Greens

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dc.contributor.authorBarker, Whitnee Leighen
dc.contributor.committeechairAskew, Shawn D.en
dc.contributor.committeememberDerr, Jeffrey F.en
dc.contributor.committeememberWestwood, James H.en
dc.contributor.departmentPlant Pathology, Physiology, and Weed Scienceen
dc.date.accessioned2011-08-06T16:01:33Zen
dc.date.adate2004-05-25en
dc.date.available2011-08-06T16:01:33Zen
dc.date.issued2004-05-13en
dc.date.rdate2004-05-25en
dc.date.sdate2004-05-18en
dc.description.abstractConcern has been raised that herbicides recently registered for use in warm-season turf to control perennial ryegrass could be dislodged from treated areas and deposited on neighboring cool-season grasses. In a field study, rimsulfuron was applied at 17.5 or 35 g ai/ha to perennial ryegrass in the afternoon; the following morning while dew was still present, a greens mower was driven through the perennial ryegrass and across adjacent creeping bentgrass. Irrigation had no effect on perennial ryegrass control but reduced visible track length and injury of neighboring creeping bentgrass. When treated perennial ryegrass was not irrigated prior to simulated mowing, tire tracks were evident on adjacent creeping bentgrass for up to 30 days. Gibberellic acid at 0.12 kg ai/ha and foliar iron at 1.3 kg ai/ha, applied to creeping bentgrass when tracks first appeared, did not enhance recovery of injured creeping bentgrass. Persistence and stability of [2-pyridine 14C] rimsulfuron on turf foliage was also assessed. Rimsulfuron was absorbed by annual bluegrass and perennial ryegrass equivalently and persisted equally on turf foliage. Water extractable rimsulfuron decreased from 60% at 10 minutes after treatment to 40% at 96 hours after treatment. A substantial amount of stable rimsulfuron persists on turf foliage for up to four days. Results from both studies suggest that when applying rimsulfuron near susceptible bentgrass the lowest effective rate should be used, and irrigation should follow two hours after treatment to prevent nontarget injury.en
dc.description.degreeMaster of Scienceen
dc.format.mediumETDen
dc.identifier.otheretd-05182004-155348en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-05182004-155348en
dc.identifier.urihttp://hdl.handle.net/10919/9929en
dc.publisherVirginia Techen
dc.relation.haspartMS_WBarker.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectabsorptionen
dc.subjectgibberellic aciden
dc.subjectfoliar ironen
dc.subjectherbicide relocationen
dc.subjectherbicide movementen
dc.subjectdislodged pesticideen
dc.subjectherbicide degradationen
dc.subjecttrackingen
dc.subjectsulfonylureaen
dc.subjectherbicide stabilityen
dc.titleLateral Movement of Herbicides on Golf Course Fairways and Effects on Bentgrass Greensen
dc.typeThesisen
thesis.degree.disciplinePlant Pathology, Physiology, and Weed Scienceen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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