Full TGIF Record # 188410
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Web URL(s):https://www.plantmanagementnetwork.org/pub/trial/PDMR/reports/2011/T045.pdf
    Last checked: 11/14/2016
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Report
Author(s):Golembiewski, R. C.; McDonald, B. W.
Author Affiliation:Department of Horticulture, Oregon State University, Corvallis, OR
Title:Evaluation of fungicides for control of Microdochium patch on annual bluegrass in western Oregon, 2010
Section:Turfgrass
Other records with the "Turfgrass" Section
Source:PDMR: Plant Disease Management Reports. Vol. 5, 2011, p. T045.
Publishing Information:St. Paul, MN: American Phytopathological Society
# of Pages:1
Keywords:TIC Keywords: Azoxystrobin; Chlorothalonil + fludioxonil + propiconazole; Fluoxastrobin; Fungicide trials; Golf greens; Iprodione; Microdochium; Phytotoxicity; Poa annua; Quality evaluation; Quintozene; Thiophanate-methyl; Trifloxystrobin; Trifloxystrobin + triadimefon
Trade Names:Compass; Heritage; Disarm; FF-II; Interface; Instrata; Tartan; Cleary 3336
Abstract/Contents:"The objective of this study was to evaluate the efficacy of fungicides for the control of Microdochium patch on an annual bluegrass putting green. The trial was initiated on 22 Feb 10 on an annual bluegrass putting green located at the Oregon State University Lewis-Brown Horticulture Farm in Corvallis, Oregon. The green was constructed using the California method where 12 in. of straight USGA sand was placed on a soil sub grade over flat drainage lines. Poa annua sod (purchased from Boss Sod, Canada) was laid in early May of 2009. The green was mowed at 0.150 in. and maintained in accordance with golf course putting green standards. Fungicide applications were made on a 3 week interval and were applied 3 times (22 Feb 10, 17 Mar 10, and 09 Apr 10) except for treatment 11 (Instrata) which was applied only twice because of phytotoxicity to the turf. The plots measured 5 ft long x 5 ft wide. Sprayable fungicide treatments were applied with a CO2-powered two-wheeled sprayer with a 5 ft boom using TeeJet 80015 nozzles spraying 2 gallons of spray solution per 1,000 sq ft at 30 psi. Due to the difficulty of applying small amounts of granules evenly across a plot, granules were mixed with screened cat litter to bulk up the sample size and assist in even particle distribution. Following application they were watered in for 6 minutes with the irrigation system, or by applying 1 gallon of water to each plot with a watering can. Speed was calibrated with a KORG MA-30 metronome. Turf quality and percent disease cover ratings were taken on 17 Mar, 31 Mar, 9 Apr and 20 Apr. Because of limited space only the last three rating dates are shown. Data were subjected to analysis of variance using a randomized complete block design with 3 replications. Differences between means were determined by Fisher's Protected LSD at the 5 percent level. Disease pressure was low at the start of the trial and then increased over time. The untreated check plots averaged 25.0 percent disease cover on the last rating date, 20 Apr. Interface provided good disease control at all three rates, as well as, Interface mixed with Cleary's 3336, PCNB applied as FFII, and Instrata. Cleary's 3336 applied alone did not control disease, nor did Tartan SC. Additionally, none of the granular strobilurin fungicides provided acceptable disease control. Of the six treatments that controlled disease, the three Interface treatments had the best turf quality. Interface and Tartan are Bayer products that include the StressGardTM technology, a blue pigment which darkens turf color often leading to higher turf quality ratings. The rate of Instrata was too high for the 3 week spray interval and caused significant phytotoxicity to the turfgrass after two applications. Additionally, the turf quality of plots treated with Fungicide FFII G declined after the third application because of some phytotoxicity to the turfgrass."
Language:English
References:0
Note:This item is as abstract and tables only!
Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Golembiewski, R. C., and B. W. McDonald. 2011. Evaluation of fungicides for control of Microdochium patch on annual bluegrass in western Oregon, 2010. PDMR: Plant Dis. Manage. Rep. 5:p. T045.
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https://www.plantmanagementnetwork.org/pub/trial/PDMR/reports/2011/T045.pdf
    Last checked: 11/14/2016
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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