| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
a Dep. of Horticulture, Forestry, and Recreation Resources, Kansas State Univ., Manhattan, KS 66506-5507
b Crop Science Dep., 100 Derieux St., North Carolina State Univ., Raleigh, NC 27695-7620
c USDA-ARS and Crop Science Dep., 840 Method Rd. Unit 3, North Carolina State Univ., Raleigh, NC 27695-7620
* Corresponding author (mfagerne{at}oznet.ksu.edu)
Applications of the plant growth regulator (PGR) trinexapac-ethyl [4-(cyclopropyl-
-hydroxymethylene)-3,5-dioxocyclohexane carboxylic acid ethylester] (TE) can delay winter dormancy in ‘Tifway’ bermudagrass (Cynodon dactylon var. dactylon), which suggests a response to TE when temperatures are suboptimum for bermudagrass growth. The purpose of this study was to investigate the interactive role of temperature and TE in bermudagrass growth responses, dormancy, and freezing tolerance. Trinexapac-ethyl (0.11 kg a.i. ha-1) was applied in two growth chamber experiments, and across a 2-yr period in the field. Results indicated that TE reduced vertical shoot growth and increased stolon production, turf density, and quality when applied at high temperatures (35–36°C). While TE effectively reduced vertical shoot growth at low (20–22°C) temperatures, little impact on stolon development was observed under these conditions. Autumn applications of TE when temperatures were cool (
25°C) at the time of application led to decreased turfgrass density and quality. These responses may explain the effectiveness of using TE to aid in bermudagrass transition to overseeded cool-season grasses and were probably due to the limited ability of bermudagrass to recover from initial post-application growth reduction and observed leaf chlorosis. Observed delayed autumn dormancy due to summer applications of TE and accelerated dormancy due to late-season applications did not conclusively relate to the freezing tolerance of bermudagrass.
Abbreviations: PGR, plant growth regulator • TE, trinexapac-ethyl • WAT, weeks after treatment
This article has been cited by other articles:
|
|
 |
|
  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, B. E. Branham, and L. A. Spomer Plant Growth Regulators Alter Kentucky Bluegrass Canopy Leaf Area and Carbon Exchange Crop Sci., March 1, 2007; 47(2): 757 - 764. [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]
|
|
|
|
|
|
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]
|
|
|
|
|
|
D. J. Lee, D. C. Bowman, D. K. Cassel, C. H. Peacock, and T. W. Rufty Jr. Soil Inorganic Nitrogen under Fertilized Bermudagrass Turf Crop Sci., January 1, 2003; 43(1): 247 - 257. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. D. Richardson Turf Quality and Freezing Tolerance of 'Tifway' Bermudagrass as Affected by Late-Season Nitrogen and Trinexapac-Ethyl Crop Sci., September 1, 2002; 42(5): 1621 - 1626. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| The SCI Journals | Agronomy Journal | Vadose Zone Journal | |||
| Journal of Natural Resources and Life Sciences Education |
Soil Science Society of America Journal | ||||
| Journal of Plant Registrations | Journal of Environmental Quality |
The Plant Genome | |||
