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| Publication Type:
| Report |
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| Author(s): | Watkins, J. E.;
Wit, L. A. |
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| Author Affiliation: | Department of Plant Pathology and Department of Horticulture, University of Nebraska, Lincoln, NE 68583-0722 |
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| Title: | Effect of fungicides on brown patch development, 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. 380. |
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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; Brown patch; Rhizoctonia solani; Fungicide evaluation; Disease development; Disease control
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| Cultivar Names: | Manhattan |
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| Abstract/Contents: | "Plots were located on a Manhattan ryegrass turf established Sep 1985 at the University of Nebraska John Seaton Anderson Turfgrass Research Facility, Mead, NE. The experimental area was inoculated late May with Rhizoctonia solani cultured on sterilized oat seed. The inoculum was applied with a 4-ft Gandy drop spreader calibrated to deliver 10 lb oat inoculum per 1000 sq ft. Preemergent weed control was 1.5 lb pendimethalin per acre applied 21 Apr and 16 Jun. Plots were fertilized with 1.5 lb N per 1000 sq ft on 25 May and 21 Jun. Irrigation was applied nightly for a total of 1.5 in per week during the growing season, and the plots were mowed weekly at 2.5 in with clippings returned. Fungicide applications were initiated 23 Jun and repeated at two or three week intervals until 4 Aug. Products were applied with CO²-pressurized (25 psi) backpack sprayer with a flat fan nozzle calibrated to deliver 5 gal spray solution per 1000 sq ft. Plot size was 25 sq ft. Each treatment was replicated three times in a randomized complete block design. Precipitation was below normal during Apr and May and near or slightly above normal from Jun through Sep. Temperatures were near or slightly below normal during mid-summer. Brown patch developed rapidly during Jun and early Jul but slowed due to cooler weather and was only moderately severe by mid-Aug. By mid-Jul most fungicide treatments were showing significantly less brown patch than the untreated control. All fungicide treatments significantly held the disease in check by mid-Aug; however, disease development in the untreated plots also showed a slight decrease in severity, probably due to the onset of cooler temperatures and less humidity. Daconil 82.5 SDG performed similar to Daconil 2787F. The same trend was noted between Chipco 26019 WDG and Chipco 26019 Flowable. Aliette WDG + Fore FL at 2 oz + 3.2 fl oz provided as good of control as the 4 oz + 6.4 fl oz rate. The addition of Daconil 2787F as a tank mix with ProStar did not result in a higher level of control over the ProStar by itself. The alternating of Eagle with Fore FL showed a slight improvement in control when compared to each applied alone. Treatments EXP10452A and EXP10361A caused moderate stunting of the turf." Data is given in table form including treatment and rate per thousand square feet, application schedule, and brown patch severity. |
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| Language: | English |
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| References: | 0 |
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| Note: | Report #370
Table |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Watkins, J. E., and L. A. Wit. 1995. Effect of fungicides on brown patch development, 1994. Fungicide Nematicide Tests. 50:p. 380. |
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