Effects of spring applications of various Briskway tank mixtures on quality of a 'Champion' bermudagrass putting green

摘要

Various fungicide tank mixtures were evaluated for their effect on turf quality on an ultradwarf bermudagrass putting green. The study was conducted at the Duke Golf Club in Durham, NC on 'Champion' bermudagrass maintained as a golf course putting green. Plots were mowed 6 times per week at 0.150-in. with clippings collected. The study was irrigated to prevent drought stress. Fertility, pesticides, and wetting agent were applied in accord with normal putting green management practices. No broadcast fungicide applications were made to the test site during the study. Individual plots were 3 ft x 10 ft and arranged in a randomized complete block with 4 replications. Treatments were initiated on 15 Mar and reapplied on 14 day intervals. Patch-like symptoms similar to yellow patch developed in the research area and severity (% turf area exhibiting symptoms) was assessed on 24 Apr and 9 May. Turfgrass quality was assessed on 28 Mar, 11 and 24 Apr, and 9 and 23 May using a 1-9 scale (9=best, 6=acceptable)based on color, density, and uniformity. NDVI was assessed on the same dates as turf quality beginning 24 Apr. Turfgrass clippings were collected from individual plots on 24 Apr, 9 and 23 May, and 6 Jun. Clippings were oven dried for at least 5 days anddry weights were recorded as g/plot. All data were subjected to analysis of variance and means separation by Waller-Duncan k-ratio t-test (k=100).