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 Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Web of Science (13) Citing Articles via Google Scholar Google Scholar Articles by Goss, R. M. Articles by Calhoun, R. N. Search for Related Content PubMed Articles by Goss, R. M. Articles by Calhoun, R. N. Agricola Articles by Goss, R. M. Articles by Calhoun, R. N. Related Collections Turfgrass Management Crop Growth and Development Turfgrass

TURFGRASS SCIENCE

Trinexapac-Ethyl and Nitrogen Effects on Creeping Bentgrass Grown under Reduced Light Conditions

^a Dep. of Agronomy and Horticulture., Univ. of Nebraska, Lincoln, NE 68583
^b U.S. Golf Assoc., P.O. Box 4717, Easton, PA 18043
^c Dep. of Crop and Soil Sci., Michigan State Univ., East Lansing, MI 48824

* Corresponding author (rgoss{at}unlserve.unl.edu)

Shade is a major cause of poor performance and loss of turf, especially on putting greens. The objectives of this study were to determine the effects of trinexapac-ethyl (TE) [4-(cyclopropyl-alpha-hydroxymethylene)-3, 5-dioxo-cyclohexanecarboxylic acid ethylester] and nitrogen (N) on the performance and carbohydrate content of creeping bentgrass (Agrostis stolonifera L. cv. ‘Penncross’) grown under reduced light conditions (RLC). The effect of rate and frequency of TE applications to creeping bentgrass under RLC also were evaluated. Two field experiments were conducted during 1998 and 1999 in East Lansing, MI on an established sand-based putting green mowed to a height of 4 mm. In the first experiment (1998 and 1999), turf grown under 80% black shade cloth received multiple applications of TE (0, 0.042 or 0.070 kg a.i. ha^-1) in combination with N (low = 150–185 kg N ha^-1 season^-1 or high = 212–235 kg N ha^-1 season^-1). Turf quality and cover were reduced greatly under 80% shade. Application of TE increased turf cover from 6 to 33%, tillers from 40 to 52%, but had no effect on root mass when compared with turf not treated with TE. Fructose content increased by 40 and 37% in turf treated with TE at 0.042 and 0.070 kg a.i. ha^-1, respectively. No differences in tissue levels of other carbohydrates or starch were found. Turf cover was 3.3 to 7.2% greater in plots treated with low N when compared with high N. There were no significant interactions between TE and N. In the second experiment (1999), turf grown under 60% green shade cloth received TE (0, 0.025, or 0.050 kg a.i. ha^-1) applied on 2- or 4-wk intervals. There were no differences in turf cover in bentgrass grown under 60% shade, regardless of TE treatment. In general, creeping bentgrass quality and color were improved by TE, when compared with untreated turf. Overall, data indicated that TE and judicious use of N can improve creeping bentgrass quality under RLC.

Abbreviations: ASTM, American Society of Testing Materials • ET, evapotranspiration • GA, gibberellic acid • PGR, plant growth regulators • RLC, reduced light conditions • RSR, root to shoot ration • TE, trinexapac-ethyl

This article has been cited by other articles:

				C. M. Baldwin, H. Liu, L. B. McCarty, H. Luo, and J. E. Toler Nitrogen and Plant Growth Regulator Influence on 'Champion' Bermudagrass Putting Green under Reduced Sunlight Agron. J., January 8, 2009; 101(1): 75 - 81. [Abstract] [Full Text] [PDF]

				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]

				J. S. Beasley and B. E. Branham Trinexapac-ethyl and Paclobutrazol Affect Kentucky Bluegrass Single-Leaf Carbon Exchange Rates and Plant Growth Crop Sci., January 22, 2007; 47(1): 132 - 138. [Abstract] [Full Text] [PDF]

				J. S. McElroy, D. A. Kopsell, J. C. Sorochan, and C. E. Sams Response of Creeping Bentgrass Carotenoid Composition to High and Low Irradiance Crop Sci., November 21, 2006; 46(6): 2606 - 2612. [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]

				K. Steinke and J. C. Stier Nitrogen Selection and Growth Regulator Applications for Improving Shaded Turf Performance Crop Sci., July 1, 2003; 43(4): 1399 - 1406. [Abstract] [Full Text] [PDF]