Full TGIF Record # 24516
Item 1 of 1
Publication Type:
i
Report
Author(s):Watkins, J. E.; Boosalis, M. G.; Wit, L. A.
Author Affiliation:Dept. of Plant Pathology, Dept. of Horticulture--University of Nebraska, Lincoln, NE
Title:Effect of fungicide treatment on brown patch development on perennial ryegrass, 1991
Source:Fungicide and Nematicide Tests. Vol. 47, 1992, p. 318.
Publishing Information:St. Paul, MN: American Phytopathological Society
Keywords:TIC Keywords: Brown patch; Fungicides; Development; Lolium perenne
Abstract/Contents:"The trial was located on a Manhattan ryegrass turf established Sep 1985 at the University of Nebraska John Seaton Anderson turfgrass research facility, Mead, NE. The plot area was inoculated 4 Jun with R. solani cultured on sterilized oat seed. Approximately 10 lb of oat inoculum was applied per 1000 sq ft to the plot area. Because of poor symptom development, the plot area was reinoculated at the same rate 10 Jul. Preemergent weed control was 1 lb dacthal applied 5 Apr and again 27 May. Postemergent weed control was 2,4-D, MCPP, and dicamba applied on 22 Oct 90. Plots were fertilized with 1 lb actual N on 22 Oct 90, 1 lb applied 9 May, and 0.5 lb applied 17 Jun, and again 8 Jul. Plots were irrigated nightly for a total of 1.5 in water per wk. Fungicide applications were initiated 10 Jul and repeated at one, two, or three week intervals until 21 Aug. Products were applied with a CO2-pressurized (25 psi) backpack sprayer with a flat fan nozzle. The sprayer was calibrated to deliver 5 gal of solution per 1000 sq ft. The granular products were applied with a Gandy drop spreader. Treatments were arranged in a randomized complete block design with 3 replications. Precipitation was above normal during May and below normal from Jun through Sep. Temperatures were near normal for May through Sep with intermittent periods of hot weather. Because of dry weather, brown patch development in 1991 was slow and only reached a moderate level of severity by mid-season. The most effective treatments, based on the two Aug ratings, were Lynx, ProStar+Cyproconazole, ASC-66825 at 0.6 and 1.2 oz, ASC-66791 at 3.0 oz., Banner and Broadway at 3.0 and 4.5 0z. No phytotoxicity was noted for any of the treatments."
Language:English
References:0
Note:Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Watkins, J. E., M. G. Boosalis, and L. A. Wit. 1992. Effect of fungicide treatment on brown patch development on perennial ryegrass, 1991. Fungicide Nematicide Tests. 47:p. 318.
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