Full TGIF Record # 42124
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Publication Type:
i
Report
Author(s):Schumann, G. L.
Author Affiliation:Department of Microbiology, University of Massachusetts
Title:Evaluation of fungicides for control of snow molds on creeping bentgrass, 1995-1996
Source:Fungicide and Nematicide Tests. Vol. 52, 1997, p. 371-372.
Publishing Information:St. Paul, MN: American Phytopathological Society
# of Pages:2
Abstract/Contents:"Two identical sets of plots were established for the snow mold trial. Each plot was 3 ft x 3 ft. The experimental design was a randomized complete block with four replications. The creeping bentgrass research areas were established 1 Jun on Hadley silt loam with pH 6.8. Mowing height was 0.5 inches. No pesticides were applied after mid-summer. Fall fertilization consisted of 19-4-25 at a rate of 1 lb/1000 sq ft applied on 1 Sept and 1 Oct. The last mowing date was 7 Nov. Fungicides were applied on 18 Nov. The weather at application was calm, cloudy and about 45⁰ F. The turf was still green, although no longer growing, and the soil was moist. Fungicides were applied with a CO² backpack sprayer in water equivalent to 5 gal/1000 sq ftt at 30 psi. The granular formulation was applied by hand with a shaker jar. The fungicide applications were applied and allowed to dry for about 3 hr before inoculations. The snow mold pathogens were grown on sterile rye grain for several weeks before the experiment was established. Approximately, 1.7 oz (by volume) of infested grain were applied to each plot. Grains infested with Typhula incarnata (Typhula blight/gray snow mold) were applied to the set of plots established on creeping bentgrass cv. `Providence.' Grains infested with Microdochium nivale (Fusarium patch/pink snow mold) were applied to the set of plots established on creeping bentgrass cv. `ProCup.' After inoculation, both sets of plots were covered with a 6 inch cover of straw which was pinned down with tobacco shade cloth. Heavy snowfalls began the week of 25 Nov. The plots had natural snow cover until 28 Feb when the straw was raked away. the following week, another heavy snowfall occurred keeping the plots covered for several more weeks. The disease data were recorded on 22 March after final snow melt. The 1995-96 season was exceptionally severe for snow mold because of the condition of the turfgrass at the time of first snowfall and the continuous heavy snow cover throughout the winter. There was little soil freezing. Extensive natural snow mold (both Fusarium patch and Typhula blight) was observed in the areas around the experimental plots. The data presented are from the two experiments. The column labelled `Fusarium Patch' includes data from the plots that were inoculated with M. nivale. No Typhula blight was observed in any plots in that experiment. The column labelled `Typhula Blight' includes data from the set of plots that were inoculated with T. incarnata. Fusarium patch was observed in some plots of this experiment. Some of the fungicide applications controlled Typhula blight, but did not control the natural-occurring Fusarium patch. The data represent per cent disease. Applications that controlled disease at 10% or less are commercially acceptable. A number of commercially available fungicides and fungicide combinations provided excellent control under severe disease pressure from both diseases. No phytotoxicity was observed."
Language:English
References:0
Note:Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Schumann, G. L. 1997. Evaluation of fungicides for control of snow molds on creeping bentgrass, 1995-1996. Fungicide Nematicide Tests. 52:p. 371-372.
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