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| Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/pdmr/reports/2012/T047.pdf
Last checked: 11/14/2016
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| Publication Type:
| Report |
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| Author(s): | Martinez-Espinoza, A. D.;
Burpee, L. L. |
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| Author Affiliation: | Department of Plant Pathology, University of Georgia, Griffin, GA |
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| Title: | Fungicide programs for control of dollar spot and brown patch on creeping bentgrass in Georgia, 2010 |
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| Section: | Turfgrass
Other records with the "Turfgrass" Section
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| Source: | PDMR: Plant Disease Management Reports. Vol. 6, 2012, p. T047. |
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| Publishing Information: | St. Paul, Minnesota: American Phytopathological Society |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Agrostis stolonifera; Disease control; Fungicide evaluation; Fungicide programs; Fungicide trials; Rhizoctonia solani; Sclerotinia homoeocarpa
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| Cultivar Names: | Penncross |
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| Abstract/Contents: | "A fungicide trial was conducted on a 17-yr-old sward of creeping bentgrass grown on a sand/peat root zone (pH 6.2) at the University of Georgia-Griffin campus. Fertilizer treatment consisted of 1.0 lb nitrogen (Lesco 24-4-10) per 1,000 sq ft applied on 19 Apr. The turfgrass was maintained at a height of 0.2-in. by mowing three times per week. Treatments were arranged as plots (3 ft x 4 ft) in a randomized complete block design with four replications. An initial application was made on 6 May and followed by additional fungicide applications according to scheduled protocol. Fungicides were applied using 2.5 gal of water per 1,000 sq ft with a hand-held, CO2-pressured boom sprayer at 30 psi using XR TeeJet 8002VS nozzles. On 7 May, the experimental plots were inoculated with a bentgrass isolate of Sclerotinia homoeocarpa grown on a tall fescue/barley/wheat seed mixture previously soaked in water overnight and then double sterilized in an Erlenmeyer flask. On 18 Jun experimental plots were inoculated with a bentgrass isolate of Rhizoctonia solani grown on a tall fescue/barley/wheat seed as previously described. The plots received approximately 0.24-in. of irrigation water daily at 15:00 and 17:00 hr to ensure foliar wetness for infection. Visual ratings were performed at 7- to 14-day intervals from the initial application date. For dollar spot, infection centers were counted while visual estimates of brown patch disease severity were made using a modified Horsfall-Barratt rating scale and then translated to % of severity. Values were subjected to analysis of variance and means were statistically separated using Student-Newman-Keuls at α=0.05. Dollar spot incidence progressed rapidly, reaching 123 dollar spot centers by 7 Jun. Brown patch incidence also progressed rapidly and the severity of the disease reached up to 90% in the non-treated check. Throughout the study, both fungicide programs provided significant (α<0.05) disease suppression of dollar spot and brown patch compared to the non-treated checks, respectively. No phytotoxicity was observed with any of the treatments. It is noteworthy to mention that by the end of the trial, there was an accumulation of over 60 days of continuous daytime temperatures surpassing the mid 90's °F and the nighttime temperatures surpassing the mid to upper 70's°F. The extreme weather conditions had a dramatic detrimental effect on the creeping bentgrass green in Griffin GA. The last observation (25 Aug) could have been influenced by environmental decline, attack from other diseases (Pythium) or a combination of both." |
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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!
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Martinez-Espinoza, A. D., and L. L. Burpee. 2012. Fungicide programs for control of dollar spot and brown patch on creeping bentgrass in Georgia, 2010. PDMR: Plant Dis. Manage. Rep. 6:p. T047. |
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| Web URL(s):
https://www.plantmanagementnetwork.org/pub/trial/pdmr/reports/2012/T047.pdf
Last checked: 11/14/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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