Full TGIF Record # 70034
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Web URL(s):https://www.plantmanagementnetwork.org/pub/trial/fntests/reports/2000/55-487.pdf
    Last checked: 05/03/2017
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Publication Type:
i
Report
Author(s):Weibel, E. N.; Majumdar, P. R.; Towers, G. W.; DiMarco, J. N.; Peacos, M.; Clarke, B. B.
Author Affiliation:Department of Plant Pathology, Rutgers University, New Brunswick, New Jersey
Title:Curative control of brown patch of colonial bentgrass with selective fungicides, 1999
Section:Turf grass reports
Other records with the "Turf grass reports" Section
Source:Fungicide and Nematicide Tests. Vol. 55, 2000, p. 487-488.
Publishing Information:St. Paul, MN: American Phytopathological Society
# of Pages:2
Keywords:TIC Keywords: Tank mix; Application rates; Agrostis tenuis; Brown patch; Rhizoctonia solani; Colletotrichum graminicola; Anthracnose; Necrosis; Fungicides; Fungicide evaluation; Disease control; Fungicide combinations; Phytotoxicity; Golf fairways
Cultivar Names:SR 7100
Abstract/Contents:"Fungicides were evaluated for their ability to control brown patch at the Rutgers Turf Research Farm in North Brunswick, NJ on colonial bentgrass maintained under golf course fairway conditions. Turf was established Sep 1995 on a Norton Loam with a pH of 6.1. The site was mowed at a height of 0.4 in., three times per week, and clippings were collected. Turf was irrigated to prevent drought stress. Fertilizer was applied as 16-4-8 on 2 Apr (1.1 lb N/1000 sq ft), 18-4-10 on 13 May (0.7 lb N/1000 sq ft), 16-4-8 on 15 Jun (0.4 lb N/1000 sq ft), and 18-4-10 on 9 Aug (0.75 lb N/1000 sq ft). A mixture of MCPP-4 amine (1 fl oz/1000 sq ft) plus Banvel-4 amine (0.18 fl oz/1000sq ft) was applied for broadleaf weed control on 5 Apr. Preemergent weed control was provided by Betasan 4E (7.4 fl oz/1000 sq ft) on 19 Apr. Insect pests were suppressed with Turcam 1.5G (3 lb/1000 sq ft) on 14 Sep. Aquaduct wetting agent (6.0 oz/1000 sq ft) was applied on 28 May and 27 Jul to control localized dry spots. To suppress dollar spot, the entire study was treated with Chipco 26GT (3.0 fl oz/1000 sq ft) on 15 Jun and Bayleton 50DF (2.0 oz/1000 sq ft) on 13 Sep. Plots were 3 ft x 9 ft and were arranged in a randomized complete block with four replications. Fungicides were applied in water equivalent to 2 gal per 1000 sq ft with a CO₂ powered sprayer at 30 psi using TeeJet 8003E nozzles. Treatments were initiated on 1 Jul. Fungicides were reapplied as indicated in the table. Percent turf area infected with Rhizoctonia solani was assessed on 13 Jul, 23 Jul, 31 Jul, 8 Aug, 20 Aug, and 10 Sep. Turf quality was evaluated on 21 Sep. Data were subjected to analysis of variance and means separation by Waller-Duncan k-ratio t-test (k=100) following arcsine transformation. Brown patch was first observed in late Jun. Disease pressure was very severe on untreated turf (50 to 85% turf area infected) from 13 Jul to 10 Sep. Excellent season-long control of brown patch was provided by Heritage 50WG (trt 19 and 20). Chipco 26GT 2SC + Chipco Signature 80WG (trt 3), Spectro 90WDG (trt 4), WAC 79 + Cleary 3336 50W (trt 7), WAC 79 + Daconil Ultrex 82.5SDG (trt 8), RH-0753 2SC + Eagle 40W (trt 12 and 13), Eagle 40W + Fore 80W (trt 14), Daconil Ultrex 82.5SDG (trt 21), ProStar 70W + Daconil Ultrex 82.5SDG (trt 26), and ProStar 70W/AE B066752 (trt 29) also provided good to excellent control of the target disease throughout most of the study. It is interesting to note that although Chipco 26GT 2SC + Chipco Signature 80WG (trt 3) afforded excellent disease control, the components of this mixture (trt 1 and 2) provided less than adequate suppression of brown patch. From 8 Aug to 10 Sep, untreated turf (trt 35), RH-0753 2SC (trt 9-11), ProStar 70W (trt 22-24), and ProStar 70W + Chipco 26GT 2SC (trt 25) sustained noticeable foliar necrosis induced by Colletotrichum graminicola. As a result, disease assessments for these treatments during this period represent a combined disease evaluation for both anthracnose and brown patch. All other data in the table represent percent turf area affected by brown patch only. Treatments 33 and 34 induced sever foliar necrosis from 13 Jul to 10 Sep, thus precluding disease evaluations. No other phytotoxicity was observed. With the exception of Heritage 50WG (trt 19 and 20) and ProStar 70W (trt 22-24), which sustained significant dollar spot damnage (data not shown), turf quality was closely associated with the incidence of brown patch (13 Jul to 21 Sep)."
Language:English
References:0
Note:Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Weibel, E. N., P. R. Majumdar, G. W. Towers, J. N. DiMarco, M. Peacos, and B. B Clarke. 2000. Curative control of brown patch of colonial bentgrass with selective fungicides, 1999. Fungicide Nematicide Tests. 55:p. 487-488.
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https://www.plantmanagementnetwork.org/pub/trial/fntests/reports/2000/55-487.pdf
    Last checked: 05/03/2017
    Requires: PDF Reader
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