Evaluation of Sulfonylurea Herbicides on Cool and Warm Season Turf Species
2005
Harrell, Michael S. | Williams, David W. | Brecke, Barry J.
Turf managers commonly use sulfonylurea herbicides for turfgrass weed control. The objective of this research was to provide herbicide tolerance and efficacy information for seven sulfonylurea herbicides and another herbicide on several turf and grassy weed species. Annual ryegrass (Lolium multiflorum Lam.), Kentucky bluegrass (Poa pratensis L.), creeping bentgrass (Agrostis stolonifera L.), perennial ryegrass (Lolium perenne L.), tall fescue (Festuca arundinacea Schreb.), bermudagrass (Cynodon dactylon L.), and zoysiagrassgrass (Zoysiagrass japonica Steud.) were treated with two rates of eight herbicides. Kentucky bluegrass and creeping bentgrass were the most tolerant of the cool-season species, but injury in some cases was severe. Herbicide applications to bermudagrass resulted in temporary discoloration for some treatments, but never resulted in kill. At label rates, sulfonylurea herbicides may eliminate several grass species from creeping bentgrass, Kentucky bluegrass, bermudagrass, and zoysiagrass.
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