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| Publication Type:
| Report |
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| Author(s): | Tisserat, N.;
Fry, J. |
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| Author Affiliation: | Department of Plant Pathology and Division of Horticulture, Forestry, and Recreational Resources, Kansas State University, Manhattan, KS |
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| Title: | Preventive fungicide applications for control of gray leaf spot on perennial ryegrass, 1998 |
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| Source: | Fungicide and Nematicide Tests. Vol. 54, 1999, p. 518. |
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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: Lolium perenne; Gray leaf spot; Pyricularia grisea; Disease control; Preventive control; Fungicide evaluation; Application rates; Disease severity; Myclobutanil; Triadimefon; Cyproconazole; Chlorothalonil; Azoxystrobin
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| Abstract/Contents: | "The experiment was conducted on an established ryegrass fairway at the Manhattan Country Club, Manhattan, KS. The soil was a Clime-Sogn clay silty loam. The ryegrass was maintained at 0.5 in. mowing height, irrigated as needed and fertilized with approximately 4 lb N/1000 sq ft per year. Fungicides were applied on 11 Aug with a CO₂-powered backpack sprayer with 8003 flat fan nozzles at 30 psi in water equivalent to 2.2 gal/1000 ft². Plots were not irrigated after applications. Plots were 6 ft x 10 ft and arranged in a randomized complete-block design with four replications. Plots were rated on 4 Sep for the percent plot area blighted by gray leaf spot. Gray leaf spot was not present in the fairway plots at the time of fungicide application, but it was observed at low levels (<5% area blighted) in the perennial ryegrass rough mowed at 1 in. Weather immediately following the fungicide applications was hot and dry. No gray leaf spot was detected in any plots four days after application. No further ratings were taken until 24 days after application. On 4 Sep, severe blighting was present in the untreated plots. Although most fungicides reduced the severity of gray leaf spot, only applications of Heritage and CGA 279202 gave aesthetically acceptable (<10% blighting) levels of control. Heritage at the 0.4 oz rate provided almost complete control of gray leaf spot." |
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| Language: | English |
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| References: | 0 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Tisserat, N., and J. Fry. 1999. Preventive fungicide applications for control of gray leaf spot on perennial ryegrass, 1998. Fungicide Nematicide Tests. 54:p. 518. |
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