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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Burnell, K. D.;
Yelverton, F. H.;
Gannon, T. W.;
Hinton, J. D. |
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| Author Affiliation: | North Carolina State University, Raleigh, NC |
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| Title: | Bryum argenteum (silvery thread moss) management on creeping bentgrass putting greens |
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| Section: | Section II: Weed management in turf, pasture and rangeland
Other records with the "Section II: Weed management in turf, pasture and rangeland" Section
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| Meeting Info.: | 53rd Annual Meeting, Tulsa, OK, January 24-26, 2000 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 53, 2000, p. 50-51. |
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| Publishing Information: | Champaign, IL: Southern Weed Science Society. |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Golf courses; Golf greens; Bryum argenteum; Weed control; Agrostis stolonifera; Moss control; Phytotoxicity; Iron; Soaps; Oxadiazon; Ferrous sulfate; Ammonium sulfate; Application rates; Chlorothalonil; Surfactants; Fungicide combinations
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| Cultivar Names: | Penncross |
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| Abstract/Contents: | "Silvery thread moss has recently become a problematic weed on golf course putting greens, due to deregistration of mercury-based fungicides and increased emphasis on aggressive cultural inputs. The unique biology of moss makes difficult traditional weed control principles and control strategies in turf need to be developed. Two experiments were each initiated at three golf courses in western North Carolina with high silvery thread moss populations in `Penncross' creeping bentgrass putting greens. Experiments were initiated during the summerand [summer and] continued into the fall to evaluate the usefulness of various products for the suppression of silvery thread moss. Plots were 3 ft. by 3 ft. and arranged in a randomized complete block design with four replications. `Pencross' creeping bentgrass putting greens were maintained at 5/32". The soil was a United States Golf Association standardized mix. Spray treatments from each experiment were applied with a CO2 propelled backpack sprayer while granular materials were applied using a shaker can. Experiments were initiated on August 16, 1999. Moss control, phytotoxicity and turf quality data were taken weekly through 10 weeks after initial treatment (WAIT). Moss control was rated on a 0-100% scale with 0=no effect and 100=complete control while turf quality was rated on a 1-9 scale with 1=desiccated and 9=ideal turf. In experiment 1, the treatments were arranged as follows: 4-0-0-18%Fe (Izonizer) at 14.2 lb./1000ft2, 1-0-0-4.5%Fe (Ironite) at 15lb[15 lb.]/1000ft2, Tee Time 2.3 lb./10002 + Peter's 20-20-20 1.67 lb[lb.]/1000ft2, Ultra Dawn dishwashing soap at 4 fl oz/1000ft2, and oxadiazon at 1.5 lb [lb.] a.i./A, applied alone or included with previous treatments, but only applied initially. Iron sulfate at 2 lb. Fe/1000ft2 + ammonium sulfate at 3 lb. N/1000ft2 was also applied as a treatment. Dawn was applied weekly until 3 WAIT but treatments were then discontinued due to turf injury. All other treatments were reapplied 4 WAIT (except for oxadiazon). Moss control with the 18% Fe was 49% 1 WAIT, increased to 98% 6 WAIT, and then dropped to <30% 10 WAIT. Moss control with Tee Time + Peter's 20-20-20 was 56% 1 WAIT, then fell to 40% and >10% 6 and 10 WAIT, respectively. Moss control with Peter's 20-20-20 + oxadiazon was 68% 1 WAIT, then fell to 59% and >25% 6 and 10 WAIT, respectively. Dawn applied 3 times at 1 week intervals provided 74% and <30% control 6 and 10 WAIT, respectively. One application of 1.5 lb. a.i./A of oxadiazon controlled moss 55% and 25% 6 and 10 WAIT, respectively. The combination of iron sulfate and ammonium sulfate produced 86% control 1 WAIT and gave 98% and <30% control6 [control 6] and 10 WAIT, respectively. Turf quality was reduced by the use of Ultra Dawn. Granular iron (18% Fe) and the liquid iron sulfate + ammonium sulfate provided the most effective moss control in Experiment 1. The addition of oxadiazon at 1.5 lb. a.i./A did not enhance moss control at the Jefferson Landing location. In Experiment 2, treatments included two rates of chlorothalonil (ZN) (6 and 11 oz/1000ft2) and Weather Stik (W/S) (4 and 8oz [8 oz]/1000ft2) at two different spray volumes (218 gal/acre and 436 gal/acre). All treatments were applied with the surfactant Kinetic at a concentration of 0.25% v/v. All treatments were reapplied 2 WAIT. A nontreated check was included for comparison. Control for all treatments was >90% 6 WAIT and ~50% 10 WAIT. Differences were not seen between formulation, GPA, or rate of application. Overall, all of the chlorothalonil treatments were effective in moss control and provided more persistent control than any treatments from Experiment 1. Turf quality was not reduced by any treatment in Experiment 2." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Burnell, K. D., F. H. Yelverton, T. W. Gannon, and J. D. Hinton. 2000. Bryum argenteum (silvery thread moss) management on creeping bentgrass putting greens. South. Weed Sci. Soc. Proc. 53:p. 50-51. |
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