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Web URL(s):https://archive.lib.msu.edu/tic/its/articles/1977sup89.pdf
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Publication Type:
Content Type:Abstract or summary only
Author(s):Burt, E. O.; Dudeck, A. E.; Ennis, W. B.
Author Affiliation:Institute of Food and Agricultural Sciences, Cultural Research Center, University of Florida, Florida
Title:Perennial grasses can be controlled
Section:Session 12
Other records with the "Session 12" Section
Meeting Info.:Munich, Germany: July 11-13, 1977
Source:International Turfgrass Society Program: III International Turfgrass Research Conference. 1977, p. 89.
# of Pages:1
Publishing Information:Munich, Germany: [International Turfgrass Society]
Keywords:TIC Keywords: Application rates; Chemical control; Chemical properties of soil; Comparisons; Cynodon; Glyphosate; Herbicide efficacy; Herbicide evaluation; Monocotyledons; Panicum repens; Perennial grasses; Tillage; Weed control
Abstract/Contents:"Through the ages, perennial grasses have been among the most competitive and most difficult to control pest for the farmer, the gardener and the turf manager. Likewise, chemical control has been either expensive, partially effective or the herbicide has had long persistence in the soil. With the public announcement in 1972 by Baird, et al., of glyphosate (N-(phosphonomethyl) glycine) as a new family of herbicides, a new age of weed control was initiated. The objective of these experiments were: (1) to determine the efficacy of glyphosate for control of monocots, especially perennial grasses such as torpedograss (Panicum repens L.) and bermudagrass (Cynodon dactylon (L.) Pers.); (2) to determine if tillage at varying time intervals after glyphosate application would reduce efficacy and (3) to determine the residual effects of glyphosate in the soil. Glyphosate was applied at rates of 0, 0.56, 1.12, and 4.48 kg/ha of active ingredient as an aqueous spray applied at the rate of 411 1/ ha in the weed control effectiveness studies. Higher rates were used in the soil residue tests. Results and discussion. Glyphosate gave excellent control of torpedograss at rates of 2.24 kg/ha. All top growth and rhizomes of plants having green foliage present at time of treatment were killed with this rate of application. In all experiments the 2.24 kg/ha rate was the breaking point between excellent and poor control of torpedograss. The 1.12 kg/ha rate gave excellent control (98 percent) in some experiments and poor control (52 percent) in others. The 0.56 kg/ha rate gave from 25 to 81 percent kill. Bermudagrass appeared to be slightly more tolerant than torpedograss to glyphosate, although the primary factor may have been the limited amount of foliage present on the bermudagrass plants at time of application. Bermudagrass that was maintained at putting-green height (0.6 cm) required about twice the amount of glyphosate to give the same degree of kill as bermudagrass maintained at fairway height (3.8 cm). Glyphosate was applied at rates of 2.24, 4.48, 8.96 and 13.44 kg/ha to miscellaneous weeds. Ryegrass, Kentucky bluegrass, and fine fescue were seeded and bermudagrass sprigs were planted at intervals of 1, 5 and 10 days after application of the glyphosate."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Burt, E. O., A. E. Dudeck, and W. B. Ennis. 1977. Perennial grasses can be controlled. Int. Turfgrass Soc. Annexe - Tech. Pap. p. 89.
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    Last checked: 03/17/2016
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