Full TGIF Record # 225902
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Author(s):Sanders, Patricia L.; Soika, Michael D.
Author Affiliation:Sanders: Associate Professor; Soika: Sr. Research Aide, Plant Pathology
Title:Control of pytium blight on perennial ryegrass with fungicide treatments, 1991
Section:1991 results: Disease control in turfgrass
Other records with the "1991 results: Disease control in turfgrass" Section
Source:Turfgrass Research Results 1990/1991 [Penn State]. 1991, p. 110-111.
# of Pages:2
Publishing Information:[University Park, Pennsylvania]: [Pennsylvania State University, College of Agriculture, Agronomy Dept., Entomology Dept., Horticulture Dept., Plant Pathology Dept.]
Abstract/Contents:"An evaluation of fungicide treatments for control of Pythium blight (Pythium aphanidermatum) was conducted at the Valentine Turfgrass Research Center, University Park, PA, on perennial ryegrass (Lolium perenne 'Pennfine'), maintained under golf course fairway management conditions. The experimental area was fertilized on 16 May and 19 Jun with 1.0 and 0.75 lbs, respectively, actual N (urea 46-0-0) per 1000 sq ft. Caddy at 1.5 fl oz per 1000 sq ft was applied on 22 May to control red thread/pink patch in the experimental area. On 28 May and 17 Jul, Tersan 1991 at 2 oz was applied for dollar spot and brown patch control. Dyrene at 8 oz was applied on 20 Jun for dollar spot and brown patch control. Individual treatment plots, 3 ft x 18 ft, were arranged in a randomized complete block design with three applications. Fungicides were applied with a CO2-powered, boom sprayer using T-jet 8004 nozzles, at 30 psi, in water equivalent to 2 gal per 1000 sq ft. Fungicide applications were made on 18 Jul. Two days after fungicide application (20 Jul), a 3-ft wide strip across all treatments was inoculated with a 6-isolate pool of Pythium aphanidermatum grown on autoclabed rye grain. Following inoculation, the 3 ft-wide inoculated strip was covered with PVC pipe-framed, translucent plastic-covered humidity chambers to increase relative humidity and minimize radiational cooling at night. Humidity chambers were equipped with intermittent mist to maintain a saturated atmosphere. Chamber ends were open and a 2-minute mist was applied every 20 min during daylight hours. At night, chamber ends were closed and no mist was applied. After 5 days incubation (25 Jul), the chambers were removed and the inoculated areas were visually rated (7 days after treatment). A second sequential inoculation was made on 25 Jul in the manner described above. Chambers were removed and this inoculation was rated at 18 days after treatment (5 Aug). Data was subjected to analysis of variance and Duncan's Multiple Range test. At 7 days after treatment, the reduced rate mixture of Banol/Pace, the full-rate mixture of Aliette/Banol, and Aliette WP at 8 oz were providing excellent disease suppression. By 18 days post-treatment, the one-half rate mixture of Banol/Subdue and Subdue alone at 1 oz were providing the best disease control."
Note:Reprint appears in Fungicide and Nematicide Tests, Vol. 47 1992, p. 316
Reprint appears in The Keynoter, 19(5) Winter 1992, p. 3
This item is an abstract and table only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Sanders, P. L., and M. D. Soika. 1991. Control of pytium blight on perennial ryegrass with fungicide treatments, 1991. Turfgrass Research Results 1990/1991 [Penn State]. p. 110-111.
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