Fungicide evaluation for the preventive control of snow molds on Kentucky Bluegrass and Annual Bluegrass, Breckenridge, 2003-2004

摘要

Experiments for control of pink and gray snow mold were performed on Kentucky bluegrass/annual bluegrass fairways at Breckenridge Golf Course, Breckenridge, CO (elev. 9,300 ft). Treatments were arranged in a randomized complete block design withfour replications. Individual plots measured 5 ft x 5 ft. First applications of five treatments of fungicides were applied 1 Oct 03. A second application of the five treatments and the remainder of the treatments were applied 18 Oct 03. All fungicides were applied in the equivalent of 5 gal water/1000 sq ft. A CO2-powered sprayer equipped with 8003 Tee-jet nozzles delivered the treatments at 30 psi. Fungicide effectiveness was evaluated after snowmelt on 2 Apr 04. Visual ratings were based on the Horsfeld-Barrett rating scale where1=no disease, 2=trace-1%, 3=1-5%, 4=5-15%, 5=15-25%, 6=25-50%, 7=50-75%, 8=75-85%, 9=85-95%, and 10=95-100%. The results are the means of 4 replications using SAS statistical software.