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| Publication Type:
| Report |
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| Author(s): | Hsiang, Tom;
Cook, Sandra |
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| Author Affiliation: | Dept. Environmental Biology, Univ. of Guelph, Guelph, ON, Canada N1G 2W1 |
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| Title: | Chemical trials for snow mould disease control in southern Ontario, 1993-1994 |
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| Section: | Turf Grass Reports
Other records with the "Turf Grass Reports" Section
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| Source: | Fungicide and Nematicide Tests. Vol. 50, 1995, p. 334. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Snow molds; Typhula; Gerlachia nivalis; Fungicides; Spring green-up; Microdochium nivale; Typhula incarnata; Typhula ishikariensis
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| Abstract/Contents: | "Twenty-four chemical and control treatments were evaluated on a 16-year-old sward of creeping bentgrass in Southern Ontario during Dec 1993 to to Apr 1994. Treatments were applied on 1 Dec 1993 to turf with no snow cover, and inoculum was applied two days later. The fungicides tested included: Arrest, Daconil 2787, Rovral Green, Scotts FFII, and Tersan 1991, which are registered and recommended for controlling snow mould disease of turfgrass in Ontario. Seventeen other treatments involving chemicals provided by ISK Biosciences, Nutrite, and Rohm & Haas were also tested. The snow mould disease caused by Typhula spp. (Typhula blight or grey snow mould), and Fusarium nivale (Fusarium patch or pink snow mould), were evaluated in these tests. Treatments were arranged in a randomized complete block design if 1.5 m x 1 m plots with 3 blocks separately for the two diseases. Inoculum was prepared by incubating the fungi on autoclaved cereal grains for 1 month (pink) and 3 months (grey). The inoculum was dried overnight and chopped with a mixer into small particles. Inocula from five strains of the grey snow mould fungus (1 T. ishikariensis and 4 T. incarnata) were mixed and combined with another 9 parts of dried, autoclaved and chopped cereal grains. Fifteen grams were evenly applied to each plot 2 days after spraying. Pink snow mould inoculum was similarly formulated and applied. Water based-treatments were applied on 1 Dec 1993, with a wheel-mounted compressed air boom sprayer at 140kPa in water at 11I/100mĀ² using Lurmark 03-F110 nozzles. Granular treatments were applied by hand. Cultural maintenance conditions were as follows. Sulfur-coated urea (N-P-K: 25-4-10) was applied at a rate of 2 kg/100mĀ² in Apr and Nov annually. Mowing height during growing season was set at 5 mm. Daconil 2787F at a rate of 250 ml/100 mĀ² was applied in late November annually, except for plot areas that were chosen for snow mould testing. The underlying soil was a Fox sandy loam with a pH of 6.8. The diseases were evaluated after snowmelt (early Apr) by estimating percent area affected for either grey or pink snow mould. Ten days after first evaluation, total area affected and green-up were evaluated. Analysis of variance was performed with PROC ANOVA in SAS. When a significant treatment effect was found, mean separation was done with the test of least significant difference (LSD). An uninterrupted snowcover of greater than 3 months during the first part of 1994 allowed for a heavy snow mould disease pressure. Nearly all treatment showed statisically significant disease control compared to the inoculated check. The products Sustane and ASC99984 contain fertilizers and thus contributed to very high green up in the spring." |
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| Language: | English |
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| References: | 0 |
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| Note: | Report #326
Table |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hsiang, T., and S. Cook. 1995. Chemical trials for snow mould disease control in southern Ontario, 1993-1994. Fungicide Nematicide Tests. 50:p. 334. |
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