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| Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/fntests/reports/2000/55-520.pdf
Last checked: 05/04/2017
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Author(s): | Towers, G. W.;
Majumdar, P. R.;
Weibel, E.;
DiMarco, J. N.;
Peacos, M.;
Clarke, B. B. |
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| Author Affiliation: | Department of Plant Pathology, Rutgers University, New Brunswick, New Jersey |
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| Title: | Efficacy of fungicides for control of gray leaf spot on perennial ryegrass, 1999 |
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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. 55, 2000, p. 520-521. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Application rates; Disease severity; Quality; Lolium perenne; Gray leaf spot; Pyricularia grisea; Fungicide evaluation; Fungicides; Fungicide combinations; Disease control
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| Cultivar Names: | Palmer II |
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| Abstract/Contents: | "Fungicides were evaluated for their ability to control gray leaf spot on perennial ryegrass at the Rutgers Turf Research Farm in North Brunswick, NJ. Turf was established 31 Jul 98 on a Norton loam with a pH of 6.4. Mowing was performed two times weekly at a height of 2.0 in. and clippings were not collected. The site was irrigated to prevent drought stress. Fertilizer was applied as 46-0-0 on 25 Jun (1.0 lb. N/1000 sq ft), 26 Jul (0.50 lb. N/1000 sq ft), 25 Aug (1.0 lb. N/1000 sq ft), and 24 Sep (0.5 lb. N/1000 sq ft). ProStar 70W was applied to the entire test on 23 Jun (2.0 oz/1000 sq ft), 27 Jul (2.0 oz/1000 sq ft) and 23 Aug (2.2 oz/1000 sq ft) to prevent brown patch. Plots were 3 ft x 7 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 30psi using TeeJet 8003E nozzles. Treatments (trt) were initiated on 18 Aug. Fungicides were reapplied at the appropriate intervals as indicated in the table. Turf was inoculated with infected clippings (7g/sq ft) on 27 Aug and 3 Sep and was sprayed with a conidial suspension of Pyricularia grisea (11ml/ plot @ approx. 55,000 conidia per ml) on 20 Aug. Percent turf area exhibiting foliar symptoms of gray leaf spot was assessed on 18 Sep. Turf quality was evaluated on 1 Oct using a 1 to 9 scale, where 9=the best turf quality. Data were subjected to analysis of variance and means separation by Waller-Duncan k-ratio t-test (k=100). Gray leaf spot was first observed 7 Sep. Disease pressure was low to moderate in Sep and disease activity peaked on 18 Sep. Compass 50WG (trt 1-3), Compass 0.7MC (trt 4), Cleary 3336 4F (trt 5), Cleary 3336 50W (trt 6), Cleary 3336 50W + Compass 50WG (trt 7,8), Cleary 3336 50W + Protect T/O 80W (trt 9), Daconil Ultrex 82.5SDG (trt 10-12), Lynx 45W + Daconil Ultrex 82.5SDG (trt 15,16), Bayleton 50W + Daconil Ultrex 82.5SDG (18,19), the 0.5 fl oz rate Banner Maxx 1.3MC (trt 20), Banner Maxx 1.3MC + Daconil Ultrex 82.5SDG (trt 22), Heritage 50WG (trt 23,24), Spectro 90WDG (trt 25), the 6.0 and 8.0 oz rates of Junction 61.1WDG (trt 32,33), Junction 61.1WDG + Banner Maxx 1.3MC (trt 34,35) and Pentathalon 37F (trt 36,37) provided good to excellent gray leaf spot control throught the study. Lynx 45W (trt 13-14), Banner Maxx 1.3MC (trt 21), the 0.30 oz rate TADS 12529 70WG (trt 30), and the 4.0 oz rate of Junction 61.1WDG (trt 31) did not provide acceptable control of the target disease. WAC 79/Spectro 90WDG (trt 26), Chipco Triton 1.67S (trt 27,28), and the 0.15 oz rate of TADS 12529 70WG (trt 29) actually enhanced the severity of gray leaf spot in this study. Turf quality was closely associated with the indcidence of gray leaf spot (7 Sep to 1 Oct). No phytotoxicity was observed." |
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| Language: | English |
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| References: | 0 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Towers, G. W., P. R. Majumbar, E. Weibel, J. N. DiMarco, M. Peacos, and B. B. Clarke. 2000. Efficacy of fungicides for control of gray leaf spot on perennial ryegrass, 1999. Fungicide Nematicide Tests. 55:p. 520-521. |
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| Web URL(s):
https://www.plantmanagementnetwork.org/pub/trial/fntests/reports/2000/55-520.pdf
Last checked: 05/04/2017
Requires: PDF Reader |
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MSU catalog number: SB 951.3 .F82 |
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