Full TGIF Record # 231553
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Author(s):Kopec, D. M.; Gilbert, J. J.; Scott, R. A.; Molin, W. T.; McCloskey, B. B.; Mancino, C. F.
Author Affiliation:Kopec: Associate Extension Specialist, Turf, Plant Sciences; Gilbert, J. J.: Research Specialist, Turf, Plant Sciences; Scott: Former Farm Supervisor, Karsten Turf Laboratory; Molin: Associate Professor, Weed Science, Plant Sciences; McCloskey: Assisstant Extension Specialist, Weed Control, Plant Sciences; Mancino: Associate Professor, Turfgrass Science, Plant Sciences, University of Arizona
Title:Tolerance of Tifway bermudagrass to selected post-emergence herbicides
Other records with the "Herbicides" Section
Source:1993 Turfgrass and Ornamentals Research Summary[Arizona]. 1993, p. 147-158.
# of Pages:12
Publishing Information:Tucson, Arizona: University of Arizona College of Agriculture & Life Sciences
Abstract/Contents:"The post emergence herbicides, clopyralid, fluroxypyr, triclopyr (ester and amine forms) 2, 4-D ester, quinclorac and metribuzin were applied to 3/8" Tifway bermudagrass to assess turfgrass tolerance to these herbicides. Differential rates were applied for the first four herbicides above. Turfgrass color, quality, injury, stunting and dry clipping weights were measured at select intervals from 5-40 DAT. Clopyralid (trade name STINGER) did not cause initial or subsequent discoloration at any of four rates tested. Fluroxypyr was injurious at the highest rate, and marginally so at the next lowest rate. Triclopyr (TURFLON ESTER) in the ester formulation caused more injury at the higher rate, than did the amine form (TURFLON AMINE). Turfs treated with fluroxypyr and TURFLON ESTER at the higher rates had decreased color and quality performance, followed by substantial stunting of the turf. HI-DEP (2, 4-D ester) with surfactant caused strong initial burning, and subsequent poor performance. Initial responses from quinclorac·(IMPACT) and SENCOR (metribuzin) were yellowing and pocked-marked turfs, respectively. These effects were short-lived however. Visual stunting was significant on 5, 12 and 21 DAT, as fluroxypyr and triclopyr (ester) caused the greatest stunting and clipping yield reductions at 10-14 DAT. Adequate regrowth and color occurred by 21 DAT, while quality was slightly lower for TURFLON ESTER and fluroxypyr at the highest applied rates. By 40 DAT, clipping yields (although variable) were not significantly different which showed recuperation of treated turfs. This data shows differences in tolerance and turfgrass quality after applications of these diverse post emergence herbicides. Assessment ofthe tolerance of common bermudagrass appears warranted."
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Kopec, D. M., J. J. Gilbert, R. A. Scott, W. T. Molin, B. B. McCloskey, and C. F. Mancino. 1993. Tolerance of Tifway bermudagrass to selected post-emergence herbicides. Turfgrass Landscape Urban IPM Res. Summ. p. 147-158.
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