Full TGIF Record # 18184
Item 1 of 1
Publication Type:
i
Report
Author(s):Dernoeden, P. H.; Krouse, J. M.
Author Affiliation:Dept. of Agronomy, Univ. of Maryland
Title:Brown patch control with Banner, CGA 455 and BAS 480, 1989
Source:Fungicide and Nematicide Tests. Vol. 45, 1990, p. 283.
Publishing Information:St. Paul, MN: American Phytopathological Society
Keywords:TIC Keywords: Lolium perenne; Brown patch; Propiconazole; Vinclozolin; Thiophanate-methyl; Fungicide evaluation
Abstract/Contents:"This study was conducted on an Apr 1989 seeded stand of perennial ryegrass. Fungicides were applied either preventatively (before folia blighting was observed) or curatively on 14-day intervals on those dates noted in the data table. Fungicides were applied with a CO2 pressurized (38 psi) sprayer in 2.5 gal. water per 1000 ft2. Rain (0.15 in.) occurred within 24 hrs of the 22 Jun application, but no rain occurred within 24 hrs of any other spray date. Soil was a Chillum silt loam with a pH of 7.1 and 1.3% OM. Plots were 5 by 5 ft, and were arranged in a randomized complete block with four replications. Percent of plot area blighted was visually determined on a 0 to 100% scale. Overall quality was visually assessed on a 0 to 10 scale where 0 = brown or dead turf, and 10 = optimum greenness and density. Treatments with ratings that exceed 5% plot area blighted would be considered unacceptable control for golf course fairway turf. Weather conditions fluctuated frequently from cool-wet to warm-dry weather, and disease pressure ranged from light to moderate in Jul, and from moderate to high in Aug. During Jun and Jul, when most of the treatments were applied, brown patch pressure was light and all Banner and CGA 455 treatments provided acceptable control, reducing blight damage significantly on all rating dates. It became evident by 26 Jul that BAS 480, at the rates evaluated, was not providing commercially acceptable brown patch control, although it did reduce the level of blighting significantly on all rating dates. Ronilan and CGA 455 (P at 1.0 oz. and C at 0.5 oz.) provided acceptable brown patch control up through 18 Aug, but exhibited reduced residual effectiveness on 29 Aug. Excellent, residual control was provided by both rates of Banner, Banner + Daconil, and CGA 455 (applied on the curative schedule at the 1.0 or 2.0 oz. rate). Highest overall quality on 29 Aug was observed in turf treated with Banner and CGA 455 (curatively at the 1.0 or 2.0 oz. rate)."
Language:English
References:0
Note:Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Dernoeden, P. H., and J. M. Krouse. 1990. Brown patch control with Banner, CGA 455 and BAS 480, 1989. Fungicide Nematicide Tests. 45:p. 283.
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