Full TGIF Record # 58734
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Author(s):Dudeck, A. E.; Peacock, C. H.
Author Affiliation:Dudeck:Associate Professor; Peacock: Assistant Professor of Ornamental Horticulture, University of Florida, IFAS, Gainesville, Florida
Title:Effects of carboxin and gibberellic acid on cool-season regrowth of bermudagrass turfs
Source:The Soil and Crop Science Society of Florida: Proceedings. Vol. 44, 1985, p. 146-149.
# of Pages:4
Publishing Information:Hollywood, Florida: Soil and Crop Science Society of Florida
Keywords:TIC Keywords: Gibberellic acid; Carboxin; Stimulants; Growth; Cynodon dactylon; Cynodon transvaalensis; Lolium multiflorum; Application rates; Application frequency; Color; Shoot density; Turfgrass quality; Winter; Irrigation scheduling
Abstract/Contents:"Rate, frequency, and mixtures of carboxin (5,6-dihydro-2-methyl-N-phenyl-1,4-oxathiin-3-carboxamide) and gibberellic acid (GA3) were evaluated as growth stimulants on a 'Tifgreen' bermudagrass (Cynodon spp.) putting green during cool winter months at Gainesville, FL. Turf growth rate, color, density, and quality were measured over a 3-month period. Carboxin was uneffective while GA₃ had a marked effect on all measured parameters in Tifgreen bermudagrass. However, weekly application of GA3 at 30 g ha-1 or biweekly applications at 62 g ha-1 severely reduced turf density 86% compared to untreated control plots. Similarly, while weekly applications of GA3 linearly increased topgrowth of 'Tifdwarf' bermudagrass during suboptimum temperatures, turf density was severely reduced 83% compared to untreated control plots. Weekly applications of N at 12.5 kg ha-1 along with GA3 applications enhanced the response of Tifdwarf bermudagrass. Irrigation of 6 mm or more of H2O applied immediately after spray application of GA3 to Tifdwarf bermudagrass negated the treatment. If irrigation was applied after 1 or more h, the GA3 treatment was effective indicating that gibberellic acid is foliarly absorbed by bermudagrass during cool temperatures. Gibberellic acid at rates as low as 3 g ha-1 linearly increased growth rates greater than 31 kg ha-1d-1 in Italian ryegrass (Lolium multiflorum Lam.). The use of gibberellic acid should not be considered a substitute for overseeding semidormant bermudagrass but only as a temporary growth stimulant during occasional periods of suboptimum temperatures."
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Dudeck, A. E., and C. H. Peacock. 1985. Effects of carboxin and gibberellic acid on cool-season regrowth of bermudagrass turfs. p. 146-149. In The Soil and Crop Science Society of Florida: Proceedings. Hollywood, Florida: Soil and Crop Science Society of Florida.
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