Steven Borst, J. Scott McElroy, John C. Sorochan, and Greg K. Breeden. 2431 Joe Johnson Drive, University of Tennessee, University of Tennessee/ Turfgrass Weed Science, 252 Ellington Plant Science Building, Knoxville, TN 37996-4561
Carfentrazone and mancozeb plus copper hydroxide (mancozeb) are utilized to control Bryum argenteum (Silvery-thread-moss) in creeping bentgrass (Agrostis palustris) putting greens. Bryum argenteum is not the only moss species found on golf course putting greens. Bryum argenteum, Entodon seductrix and Amblystegium serpens were harvested from surrounding golf courses and samples of parent plants were grown in a greenhouse environment. Carfentrazone and mancozeb were both applied to these species and injury was rated (0-100%). Carfentrazone (0.056 kg ai/ha and 0.112 kg ai/ha) and mancozeb (3.73 kg ai/ha and 7.46 kg ai/ha) were applied singly and sequentially. Carfentrazone injured Bryum argenteum more than Entodon seductrix and Amblystegium serpens. The greatest injury observed was with carfentrazone applied sequentially. Carfentrazone applied sequentially at the high rate injured Bryum argenteum greater than single applications. Mancozeb injury of the different moss species was minimal. Limited or no injury was observed with both chemicals when applied to Entodon seductrix. Minimal injury was observed on Amblystegium serpens with all treatments. Variation in moss control on putting greens between different golf courses could potentially be attributed to differences in moss species.
