Full TGIF Record # 80652
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Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):Burnell, K. D.; Yelverton, F. H.; Thomas, J. F.; Wells, R.
Author Affiliation:North Carolina State University, Raleigh, NC
Title:Effects of light intensity on 'Penncross' creeping bentgrass and silvery thread moss
Section:Section II: Weed management in turf, pasture, and rangeland
Other records with the "Section II: Weed management in turf, pasture, and rangeland" Section
Meeting Info.:54th Annual Meeting, Biloxi, Mississippi: January 22-24, 2001
Source:Southern Weed Science Society Proceedings. Vol. 54, 2001, p. 59.
Publishing Information:Champaign, IL: Southern Weed Science Society.
# of Pages:1
Keywords:TIC Keywords: Light intensity; Agrostis stolonifera; Bryum argenteum; Moss control; Dry weight; Chlorophyll; Leaf width; Root length; Root weight; Competition
Cultivar Names:Penncross
Abstract/Contents:"Silvery thread moss is increasing across the United States and has become a problematic weed on golf course putting greens. Reasons maybe [may] be due to the lost [loss] of mercury-based fungicides and increased emphasis on aggressive cultural inputs. The unique biology of moss makes traditional weed control difficult and control strategies need to be developed. Experiments were initiated at the Southeastern Plant Environment Lab (Phytotron) during the summer of 2000 and ran for eight weeks. Plots were 25.6 cm2 and arranged in a split plot design with whole plot factors being light intensities and subplot factors being species with eight replications. Four (1.11 M2) growth chambers set to operate at a 12 hours photoperiod with day/night temperatures of 22/15°C. Light intensities of 325, 235, 180, and 80μmol m-2 s-1 of Photosynthetically Active Radiation (PAR) were used. No changes in light intensities were found at termination of the experiment. 'Penncross' creeping bentgrass was mowed at 6 mm three times weekly and fertilized at four weeks with 1/6th strength Hoglands solution. All plots were subirrigated as needed. Bimonthly bentgrass oven dried clipping weights and chlorophyll a, b, and total chlorophyll (TC) contents were taken for bentgrass. Leaf width, root length, and root weight were also taken for bentgrass at termination of the experiment. Bimonthly chlorophyll a, b, and TC were also taken for moss, along with oven-dried biomass of moss were taken at termination of the experiment. Bentgrass clipping weights increased linearly with each increase in light intensity at the sixth week of observation. Significant differences in chlorophyll a, b, and TC were seen between species and light intensities at all bimonthly intervals. When TC was averaged over weeks TC was significantly when bentgrass compared to moss. Bentgrass TC was two to three times higher than that of moss. Mean leaf width and root length for bentgrass increased linearly while root weight increased exponentially with each increase in light intensity. No significant differences were also found in moss oven dry biomass. Overall, as expected, moss responds better to decreasing light when compared to bentgrass, thus shifting the competitive edge to moss."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Burnell, K. D., F. H. Yelverton, J. F. Thomas, and R. Wells. 2001. Effects of light intensity on 'Penncross' creeping bentgrass and silvery thread moss. South. Weed Sci. Soc. Proc. 54:p. 59.
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MSU catalog number: SB 611 .S6 v.54
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