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|Title:||Plant growth regulator evaluation for five Corps of Engineers projects and one military installation|
|Authors:||Natural Resources Research Program (U.S.)|
Westerdahl, Howard E.
Nelson, Linda S.
Getsinger, Kurt D.
Luu, Kien T.
Plant growth regulator
|Publisher:||Environmental Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
Abstract: A 3-year demonstration of plant growth regulator (PGR) use on turfgrass was conducted at six locations representing three cool season and three warm-season areas. The objectives of these demonstrations were to identify impacts of repeated PGR use on various turf species and to familiarize project personnel with PGR performance, application, and potential use. Plant growth regulators, applied at the recommended- label rate, approximately one half that rate, and some in combination with each other, were evaluated for performance on several turfgrass species (depending on location). Products tested included Gutless, D-Lay, Embark, Escort, Limit, Maintain, Oust, Poast, PP333, Roundup, Shortstop, and XE1019. Several PGR treatments were effective in suppressing grass growth at all locations, reducing mowing frequency by as much as 50 percent. Only one treatment, Oust (all rates applied), resulted in bluegrass-turf deterioration at the Shenango Lake Project, No permanent, detrimental effects to turf quality, e.g., turf thinning or increased disease damage, were reported as a result of repeated PGR applications at any of the other five sites. Soil residue data from all locations demonstrated that chemical decomposition was complete before each subsequent PGR application. General and specific recommendations for PGR use at all sites are provided.
|Appears in Collections:||Technical Report|