HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (18) Citing Articles via Google Scholar Google Scholar Articles by Fagerness, M.J. Articles by Yelverton, F.H. Search for Related Content PubMed Articles by Fagerness, M.J. Articles by Yelverton, F.H. Agricola Articles by Fagerness, M.J. Articles by Yelverton, F.H.

TURFGRASS SCIENCE

Tissue Production and Quality of `Tifway' Bermudagrass as Affected by Seasonal Application Patterns of Trinexapac-Ethyl

^a 100 Derieux St. Box 7620, North Carolina State University, Raleigh, NC 27695-7620 USA

mfagerness{at}aol.com

Research on the gibberellic acid (GA)–inhibiting plant-growth regulator (PGR) trinexapac-ethyl (TE) regarding seasonal effects of single vs. multiple applications of this product on turfgrass quality and tissue production has not been reported. Research was conducted at North Carolina State University on `Tifway' bermudagrass [Cynodon dactylon (L.) Pers. x Cynodon transvaalensis (Burtt-Davy)] to compare effects of different seasonal application patterns of TE. Applications of TE were made to fully established Tifway bermudagrass at either 0.107 or 0.071 kg a.i. ha^-1. Seasonal application patterns included an initial application, followed by zero, one, or two sequential applications at 4-wk intervals. Plots were rated weekly for turfgrass quality and clippings were collected weekly for evaluation of tissue production. Results demonstrated that one application of TE provided temporary growth inhibition of Tifway bermudagrass. This effect, as expected, disappeared 4 wk after initial treatment (WAIT). Post-inhibition growth enhancement (PIGE) was observed from 6 to 10 WAIT in areas treated with a single application of TE at 0.071 kg a.i. ha^-1. However, total seasonal tissue production following a single application of TE was equal to untreated areas, suggesting limited overall effects of PIGE. Conversely, one or two sequential applications of TE provided prolonged growth inhibition; total seasonal tissue production was reduced by up to 40%. Overall quality of Tifway bermudagrass was enhanced by multiple TE applications and perceived fall dormancy was delayed. Results support the use of sequential applications of TE in Tifway bermudagrass for consistent growth management throughout the growing season, avoidance of PIGE, and improvement in visual turfgrass quality.

Abbreviations: GA, gibberellic acid • PGR, plant growth regulator • PIGE, post-inhibition growth enhancement • TE, trinexapac-ethyl • WAIT, weeks after initial treatment

This article has been cited by other articles:

				S. E. McCann and B. Huang Effects of Trinexapac-Ethyl Foliar Application on Creeping Bentgrass Responses to Combined Drought and Heat Stress Crop Sci., September 1, 2007; 47(5): 2121 - 2128. [Abstract] [Full Text] [PDF]

				P. E. McCullough, H. Liu, L. B. McCarty, and J. E. Toler Trinexapac-Ethyl Application Regimens Influence Growth, Quality, and Performance of Bermuda Grass and Creeping Bentgrass Putting Greens Crop Sci., September 1, 2007; 47(5): 2138 - 2144. [Abstract] [Full Text] [PDF]

				E. H. Ervin and X. Zhang Influence of Sequential Trinexapac-Ethyl Applications on Cytokinin Content in Creeping Bentgrass, Kentucky Bluegrass, and Hybrid Bermudagrass Crop Sci., September 1, 2007; 47(5): 2145 - 2151. [Abstract] [Full Text] [PDF]

				P. E. McCullough, H. Liu, L. B. McCarty, T. Whitwell, and J. E. Toler Bermudagrass Putting Green Growth, Color, and Nutrient Partitioning Influenced by Nitrogen and Trinexapac-Ethyl Crop Sci., May 18, 2006; 46(4): 1515 - 1525. [Abstract] [Full Text] [PDF]

				M. J. Fagerness, D. C. Bowman, F. H. Yelverton, and T. W. Rufty Jr. Nitrogen Use in Tifway Bermudagrass, as Affected by Trinexapac-Ethyl Crop Sci., March 1, 2004; 44(2): 595 - 599. [Abstract] [Full Text] [PDF]

				M. J. Fagerness, F. H. Yelverton, D. P. Livingston III, and T. W. Rufty Jr. Temperature and Trinexapac-Ethyl Effects on Bermudagrass Growth, Dormancy, and Freezing Tolerance Crop Sci., May 1, 2002; 42(3): 853 - 858. [Abstract] [Full Text] [PDF]

				D. W. Lickfeldt, D. S. Gardner, B. E. Branham, and T. B. Voigt Implications of Repeated Trinexapac-Ethyl Applications on Kentucky Bluegrass Agron. J., September 1, 2001; 93(5): 1164 - 1168. [Abstract] [Full Text] [PDF]