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| Publication Type:
| Report |
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| Author(s): | Hsiang, Tom;
Cook, Sandra |
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| Author Affiliation: | Dept. of Environmental Biology, Univ. of Guelph, Guelph, ON, Canada N1G 2W1 |
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| Title: | Fungicide evaluation for control of dollar spot of creeping bentgrass in Southern Ontario, 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. 325. |
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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: Fungicides; Dollar spot; Disease control; Agrostis stolonifera
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| Abstract/Contents: | "From Jul to Sep, twenty-five chemical and control treatments were evaluated on a 16-year-old sward of creeping bentgrass in Southern Ontario at the Cambridge Research Station, University of Guelph. The fungicides tested included: Daconil 2787 and Tersan 1991, which are registered and recommended for use to control dollar spot disease of turfgrass in Ontario. Twenty-one other treatments provided by ISK Biotech, SunGro, and Rohm & Haas were also tested. Inocula of five isolates were grown on autoclaved chicken scratch, dried, chopped and applied at the rate of 1g/mĀ² on 8 Jul. Fungicides were applied to 1 m x 2 m plots with a wheel-mounted compressed air boom sprayer at 140 kPa in water at 11 l/100 mĀ² using Lurmark 03-F110 nozzles. Treatments were arranged in a randomized complete block design with 4 replications. First applications of fungicides were made on 6 Jul, and final applications on 17 Aug, with schedules following the recommended intervals. Weekly disease ratings, consisted of total counts of spots, were made between 6 Jul and 1 Sep. Cultural maintenance conditions were as follows. Sulfur-coated urea (N-P-K: 25-4-10) was applied at a rate of 2 kg/100 mĀ² in Apr and Nov annually. The plots were irrigated as needed, and mowing height was set at 5 mm. Daconil 2787 at a rate of 250 ml/100 mĀ² was applied in late November annually. The underlying soil was a Fox sandy loam with a pH of 6.8. During the 1994 growing season, Jul was much wetter than usual, and Aug had more typical warm humid days and nights conducive to dollar spot disease. Disease pressure on inoculated plots was very high from 20 Jul onward. There were some treatments which showed a see-saw pattern with disease suppression following treatment with a lag period. These patterns were especially notable for some 21-day treatments which otherwise gave excellent control." |
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| Language: | English |
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| References: | 0 |
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| Note: | Report #325
Table |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hsiang, T., and S. Cook. 1995. Fungicide evaluation for control of dollar spot of creeping bentgrass in Southern Ontario, 1994. Fungicide Nematicide Tests. 50:p. 325. |
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