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Publication Type:
| Report |
Author(s): | Brede, A. D. |
Author Affiliation: | Department of Horticulture and Landscape Architecture, Oklahoma State University, Stillwater, Oklahoma |
Title: | Plant growth regulators on bermudagrass turf |
Section: | The control of weeds and woody plants on utility, railroad and highway rights-of-way, and on industrial sites Other records with the "The control of weeds and woody plants on utility, railroad and highway rights-of-way, and on industrial sites" Section
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Meeting Info.: | Hot Springs, Arkansas: January 17-19, 1984 |
Source: | Proceedings: Southern Weed Science Society 37th Annual Meeting. Vol. 37, 1984, p. 271. |
Publishing Information: | Champaign, Illinois: Southern Weed Science Society |
# of Pages: | 1 |
Abstract/Contents: | "Eighteen plant-growth regulator (PGR) chemicals and combinations were applied to Oklahoma common bermudagrass (Cynodon dactylon) at the Oklahoma Turfgrass Research Center, Stillwater, Oklahoma, on May 20 and 23, 1983. A "trim mow" factor was also used in the experiment; one-half of each test plot was mowed at 3.8 cm just prior to PGR application. Bermudagrass regrowth, broadleaf weed density, broadleaf weeds per 929 cm2, turf discoloration, bermudagrass seedhead production per 929 cm2, length of bermudagrass internodes on stolons, turf density, and turf fresh weight were evaluated over a 4-month period. Weeds at the site included dandelion (Taraxacum officinale), slender aster (Aster exilis), dwarf fleabane (Erigeron divaricatus), and yellow woodsorrel (Oxalis stricta). Mefluidide (at 0.056 gram a.i./m2 with conventional spray application, and at 0.11 gram a.i./m2 with a rope-wick application), PP-333 (at 0.056 gram a.i./m2), Oust (at 1.75 mg a.i./m2), and Ethrel (at 0.67 gram a.i./m2) were effective in retarding bermudagrass regrowth. However, none of the treatments maintained a "freshly mowed" appearance on the test plots for more than 2 to 3 weeks after application. The four products that were most effective in limiting bermudagrass regrowth (listed above) were also most effective in reducing weed densities. Conversely, plots sprayed with EL-500 (at 0.17 gram a.i./m2, and at 0.84 gram a.i./m2 in combination with Mefluidide at 0.042 gram a.i./m2) had 8 to 9 broadleaf weeds per 929 cm2, compared to 3 weeds per 929 cm2 in the check plots. Perhaps the retarding effect of this PGR on the bermudagrass allowed for increased weed competition. Mefluidide, Oust, Ethrel, PP-333, EL-500, and the trim mowing treatment itself showed a suppressive effect on bermudagrass seedhead production. Internode length of stolons, turf density and fresh weight were unaffected by the PGR applications." |
Language: | English |
References: | 0 |
Note: | "Biotechnology & Weed Science" This item is an abstract only! |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Brede, A. D. 1984. Plant growth regulators on bermudagrass turf. South. Weed Sci. Soc. Proc. 37:p. 271. |
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