Persistent Link:
http://hdl.handle.net/10150/216577
Title:
Response of Cool Season Turfs when Overseeded on a Putting Green with a History of Rapid Blight Disease
Author:
Kopec, David M.; Olsen, Mary W.; Gilbert, Jeff J.; Bigelow, Donna M.; Kohout, Michele; Twito, Mick
Issue Date:
Feb-2004
Publisher:
College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ)
Journal:
Turfgrass, Landscape and Urban IPM Research Summary
Abstract:
Rapid blight disease is a potentially devastating disease on cool season overseed turfs when irrigated with saline water. A two year test was conducted on a closely mowed Tifgreen bermudagrass turf which was infected with visual symptoms of necrotic patches of turf, and various degrees of blighting. The test included a broad representation of turf species for overseeding in an effort to (1) determine selected specie/cultivar susceptibility and disease expression to rapid blight in the field and (2) survey and assess the association of laboratory isolate detection from field sampling, with disease occurrence and severity of expression of field maintained overseed turf. Over a two year period, Rapid blight, caused by Labyrinthula terrestris was capable of infesting most cool season grasses in this test. In year one, Dawson CRF, SRX 555 slender creeping red fescue, and SR 105210 slender creeping red fescue showed no positive lab detection results from field plots. In year two (2003-2004), only SRX 555 SLQ had only 1 plot known to carry Labyrinthula throughout the main infestation season. In year two, essentially all turf plots showed some symptomology of disease expression. This was confirmed by lab identification. Tiller infection rates varied from 2% to 80% infection in the lab from field samples. The relationship between tiller infection rates and field plot disease expression was determined by Pearson’s product and Spearman Rank correlation coefficients. Field plot disease scores were correlated with percent tiller infection rates, R² = -0.56 plot basis, and R² = –0.71 treatment mean basis, respectively. Spearman Rank correlation coefficients were R² =; -0.62 on a plot basis, and R² =–0.78 based on treatment means Agreement between the disease condition (yes/no) vs. lab findings (positive/negative) occurred on 51 of 59 plot cases, and was significant compared to chance alone occurrences. Over two years, entries which had low disease scores included Fult’s alkali grass, Dawson creeping red fescue, SRX 555 SLQ slender creeping red fescue, SR 5210 slender creeping red fescue, and Providence creeping bentgrass. Over two years, entries which produced high field disease rating scores included SR 3100 Hard fescue, TransEze intermediate ryegrass, SR 4400 perennial ryegrass, SR 7200 velvet bentgrass, SR 7100 colonial bentgrass, Sabre and Laser Poa trivialis, and Redtop.
Keywords:
Agriculture -- Arizona; Turfgrasses -- Arizona; Turf management -- Arizona; Plants, ornamental -- Arizona; Turfgrasses -- Disease; Turfgrasses -- Disease control; Turfgrasses -- Pests
Series/Report no.:
Series P-141; AZ1359

Full metadata record

DC FieldValue Language
dc.titleResponse of Cool Season Turfs when Overseeded on a Putting Green with a History of Rapid Blight Diseaseen_US
dc.contributor.authorKopec, David M.en_US
dc.contributor.authorOlsen, Mary W.en_US
dc.contributor.authorGilbert, Jeff J.en_US
dc.contributor.authorBigelow, Donna M.en_US
dc.contributor.authorKohout, Micheleen_US
dc.contributor.authorTwito, Micken_US
dc.date.issued2004-02-
dc.publisherCollege of Agriculture and Life Sciences, University of Arizona (Tucson, AZ)en_US
dc.identifier.journalTurfgrass, Landscape and Urban IPM Research Summaryen_US
dc.description.abstractRapid blight disease is a potentially devastating disease on cool season overseed turfs when irrigated with saline water. A two year test was conducted on a closely mowed Tifgreen bermudagrass turf which was infected with visual symptoms of necrotic patches of turf, and various degrees of blighting. The test included a broad representation of turf species for overseeding in an effort to (1) determine selected specie/cultivar susceptibility and disease expression to rapid blight in the field and (2) survey and assess the association of laboratory isolate detection from field sampling, with disease occurrence and severity of expression of field maintained overseed turf. Over a two year period, Rapid blight, caused by Labyrinthula terrestris was capable of infesting most cool season grasses in this test. In year one, Dawson CRF, SRX 555 slender creeping red fescue, and SR 105210 slender creeping red fescue showed no positive lab detection results from field plots. In year two (2003-2004), only SRX 555 SLQ had only 1 plot known to carry Labyrinthula throughout the main infestation season. In year two, essentially all turf plots showed some symptomology of disease expression. This was confirmed by lab identification. Tiller infection rates varied from 2% to 80% infection in the lab from field samples. The relationship between tiller infection rates and field plot disease expression was determined by Pearson’s product and Spearman Rank correlation coefficients. Field plot disease scores were correlated with percent tiller infection rates, R² = -0.56 plot basis, and R² = –0.71 treatment mean basis, respectively. Spearman Rank correlation coefficients were R² =; -0.62 on a plot basis, and R² =–0.78 based on treatment means Agreement between the disease condition (yes/no) vs. lab findings (positive/negative) occurred on 51 of 59 plot cases, and was significant compared to chance alone occurrences. Over two years, entries which had low disease scores included Fult’s alkali grass, Dawson creeping red fescue, SRX 555 SLQ slender creeping red fescue, SR 5210 slender creeping red fescue, and Providence creeping bentgrass. Over two years, entries which produced high field disease rating scores included SR 3100 Hard fescue, TransEze intermediate ryegrass, SR 4400 perennial ryegrass, SR 7200 velvet bentgrass, SR 7100 colonial bentgrass, Sabre and Laser Poa trivialis, and Redtop.en_US
dc.subjectAgriculture -- Arizonaen_US
dc.subjectTurfgrasses -- Arizonaen_US
dc.subjectTurf management -- Arizonaen_US
dc.subjectPlants, ornamental -- Arizonaen_US
dc.subjectTurfgrasses -- Diseaseen_US
dc.subjectTurfgrasses -- Disease controlen_US
dc.subjectTurfgrasses -- Pestsen_US
dc.identifier.urihttp://hdl.handle.net/10150/216577-
dc.relation.ispartofseriesSeries P-141en_US
dc.relation.ispartofseriesAZ1359en_US
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