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| Publication Type:
| Report |
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| Author(s): | Schumann, G. L. |
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| Author Affiliation: | Department of Microbiology, University of Massachusetts,Amherst, MA |
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| Title: | Evaluation of fungicides for control of snow mold on creeping bentgrass, 1996-1997 |
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| Source: | Fungicide and Nematicide Tests. Vol. 53, 1998, p. 443-444. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Agrostis stolonifera; Microdochium nivale; Disease control; Fungicides; Propiconazole; Azoxystrobin; Tank mix; Experimental products; Flutolanil; Cyproconazole; Application rates; Chlorothalonil; Quintozene; Tolclofos-methyl; Penconazole; Iprodione; Typhula incarnata
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| Abstract/Contents: | "Evaluation of fungicides for control of snow mold on creeping bentgrass, 1996-1997: Two sets of plots were established for this snow mold trial, one on creeping bentgrass cultivar Procup and the other on cultivar Providence. Each plot was 3 ft x 3 ft. The experimental design was a randomized complete block with four replications in each set of plots. Grains infested with Typhula incarnata (Typhula blight/gray snow mold) were apllied 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 bentsgrass cv. ProCup. 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. After inoculation, both sets of plots were covered with a 6 in. cover of straw which was pinned down with tobacco shade cloth. The creeping bentgrass research areas were established 1 Jun 96 on Hadley silt loam with pH 6.8. Mowing height was 0.5 inches at the time of inoculation. No pesticides were applied after mid-summer. Fall fertilization consisted of 21-3-18 at a rate of 0.5 lb N/1000 sq ft applied on 3 Sep, 17 Sep, 1 Oct, and 15 Oct. The last mowing date was 1 Nov. Fungicides were applied on 17 Nov. The weather at the time of application was calm, cloudy and about 55-60F. 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 ft at 30 psi. The granular formulations were applied by hand with a shaker jar and watered in. The fungicide spray applications were applied and allowed to dry for about 3 hr before inoculations. There was little snow thoughout the winter. The snow that did fall was often followed by heavy rains which then froze as temperatures fell. The straw cover was removed at the end of February, but a significant amount of straw was frozen to the turf. It was allowed to melt and an intial disease evaluation was made on 3 Mar. A heavy snowfall followed, which delayed the final evaluation until 26 Mar. In the following list, the first set of disease data (Fusarium test) is from the plot which were inoculated with M, nivale. The second set of disease data (Typhula test) is from the plots inoculated with T. incarnata, however, no Typhula blight developed. Therefore, the second set of data represents Fusarium patch that developed from natural inoculum. The first 30 treatments were tested in both sets of plots. The remaining treatments were tested in only one set of plots each as indicated on the list. The Green ReLeaf treatments gave unacceptable control. At the higher rate, severe phytotoxicity made determination of diease effects difficult. In plots inoculated with M. nivale, only two other treatments failed to give commercially acceptable control: Fore at 8 oz and ProStar+Daconil. The ProStar+Daconil treatment was designed for Typhula blight control. In treatments with EXP1079A, FFII, and fungicide IX, a single plot in each treatment had unexpectedly high disease in the Fusarium patch trial which annot be explained. A slight overall phytotoxicity was observed in treatments of Banner Maxx+Heritage, Daconil+Turfcide, Fore+Turfcide, Heritage+Turfcide (both rates), Prostar+Bayleton, Rizolex+Turfcide, and Sentinel+Turfcide on the creeping bentgrass cultivar Procup only. These same treatments did not cause phytotoxicity on the cultivar Providence. Any disease evaluations less than 10% would be commercially acceptable. Many of the fungicides and the combinations gave excellent control against even severe disease pressure from Fusarium patch." |
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| Language: | English |
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| References: | 0 |
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| See Also: | Other items relating to: P C N B - Quintozene |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Schumann, G. L. 1998. Evaluation of fungicides for control of snow mold on creeping bentgrass, 1996-1997. Fungicide Nematicide Tests. 53:p. 443-444. |
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