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| Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/pdmr/reports/2013/T014.pdf
Last checked: 11/14/2016
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| Publication Type:
| Report |
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| Author(s): | Fidanza, M.;
Gregos, J.;
Brickley, D. |
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| Author Affiliation: | Fidanza: Pennsylvania State University, Reading; Gregos: GEC Turf, Moon Twp; Brickley: Lebanon Country Club, Lebanon, PA |
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| Title: | Evaluation of fungicides for control of etiolation symptoms in perennial ryegrass, 2004, 2005 and 2006 |
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| Section: | Turfgrass
Other records with the "Turfgrass" Section
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| Source: | PDMR: Plant Disease Management Reports. Vol. 7, 2013, p. T014. |
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| Publishing Information: | St. Paul, Minnesota: American Phytopathological Society |
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| # of Pages: | 1 |
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| Related Web URL: | http://www.plantmanagementnetwork.org/pub/trial/PDMR/volume7/abstracts/T014.asp
Last checked: 04/03/2013
Access conditions: Document is within a limited-access website
Notes: Summary only |
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| Keywords: | TIC Keywords: Application methods; Azoxystrobin + Propiconazole; Chlorothalonil; Etiolation; Fenarimol; Fungicide evaluation; Fusarium; Iprodione; Lolium perenne; Propiconazole; Pythium diseases; Rhizoctonia solani; Thinning; Thiophanate-methyl; Trifloxystrobin + triadimefon
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| Trade Names: | Banner MAXX; Headway; Rubigan; Tartan; Chipco 26GT; Cleary 3336; Daconil Ultrex |
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| Abstract/Contents: | "Field experiments were conducted in three consecutive years on a perennial ryegrass fairway at Lebanon Country Club (Lebanon, PA) with a history of peculiar etiolation, thinning and decline often observed during late spring through late summer. Bacteria, Fusarium sp., Rhizoctonia solani and Pythium sp. were isolated from leaf blades and soil in symptomatic areas of the fairway, but no exact cause of etiolation was determined. The native silt loam soil had a pH of 6.2 with 5.4% organic matter, and the fairway was subjected to normal fertilization practices for golf courses in the Mid-Atlantic USA region. The site was mowed two or three times per week with a reel mower at 0.5 in, and in most instances clippings were not collected. Plots measured 2.5 ft x 5 ft in 2004 and 3 ft x 5 ft in 2005 and 2006, and were arranged in a randomized complete block design with three replications at a different location within the same fairway each year. Treatments were applied with a CO2-pressurized (30 psi) backpack sprayer, and delivered in 1 gal (2004) or 2.3 gal (2005 and 2006) water-carrier per 1000 sq ft. from two 8005VS flat-fan nozzles. In all three years, no other fungicides or plant growth regulators were applied to the study sites prior to conducting the field trials. Etiolation severity was assessed weekly as a count of etiolated leaf blades or tillers per plot in 2004 and 2006, or estimated as percent plot area affected in 2005. Data were subjected to analysis of variance with treatment means compared by Fisher's protected least significant difference test at P <= 0.05. Overall, the best reduction in etiolation was observed in plots treated with demethylation inhibitor fungicides such as Banner MAXX, Headway, Rubigan, and Tartan, or in plots treated with the plant growth regulators Primo MAXX alone, Trimmit alone, or Primo MAXX + Trimmit. Banner MAXX applied at the 1 and 2 fl oz rates reduced etiolation compared to the untreated plots, but applied at 0.5 fl oz rate did not. In 2004, etiolation was lower in plots treated with Chipco 26GT, Clearys 3336 and Daconil Ultrex than in untreated plots, but did not reduce etiolation in 2005 and 2006. Etiolation also was lower in plots treated with Heritage in 2006 than untreated plots, but not in 2005. Although it may be presumed that excess gibberellic acid in plant tissues triggered by low light intensity is associated with turfgrass etiolation, it is unclear from these field trials how turfgrass pathogens or other microorganisms contributed to the etiolated, weakened and thinned perennial ryegrass at this fairway location. The use of certain fungicides and plant growth regulator programs may offer an additional short-term benefit of reducing etiolation symptoms in golf course turf." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is as abstract and tables only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Fidanza, M., J. Gregos, and D. Brickley. 2013. Evaluation of fungicides for control of etiolation symptoms in perennial ryegrass, 2004, 2005 and 2006. PDMR: Plant Dis. Manage. Rep. 7:p. T014. |
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Last checked: 11/14/2016
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Access conditions: Item is within a limited-access website |
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