Hostname: page-component-cd9895bd7-jkksz Total loading time: 0 Render date: 2024-12-23T03:06:04.787Z Has data issue: false hasContentIssue false

Evaluation of V-10029 and Trinexapac-Ethyl for Annual Bluegrass Seedhead Suppression and Growth Regulation of Five Cool-Season Turfgrass Species

Published online by Cambridge University Press:  12 June 2017

Matthew J. Fagerness*
Affiliation:
Department of Crop and Soil Sciences, Michigan State University, East Lansing, MI 48824-1325
Donald Penner
Affiliation:
Department of Crop and Soil Sciences, Michigan State University, East Lansing, MI 48824-1325
*
Corresponding author's E-mail: [email protected].

Abstract

An experimental turfgrass growth regulator, V-10029, was compared with trinexapac-ethyl, a growth regulator used commonly on highly maintained turfgrasses, to evaluate growth suppression patterns and suppression of seedhead formation; the latter was evaluated on turfgrass species and annual bluegrass, a weedy species that appeared and developed seedheads in tall fescue. Plugs of creeping red fescue, Kentucky bluegrass, perennial ryegrass, and creeping bentgrass were taken from the field into a greenhouse. V-10029 at three rates (0.015, 0.029, and 0.059 kg/ha) was compared to an untreated control and trinexapac-ethyl at a label rate (0.382 kg/ha for perennial ryegrass and 0.287 kg/ha for the other four species). Of the eight replications for each treatment, four were not mowed for the purpose of evaluating suppression of seedhead formation, and four were used for weekly clipping collection to evaluate growth suppression. Compared to the untreated control, V-10029 at all three applied rates caused significant seedhead suppression in both tall fescue infested with annual bluegrass (> 90%) and perennial ryegrass (50 to 80%). Trinexapac-ethyl was not as effective, causing seedhead suppression levels of 57% in annual bluegrass found in tall fescue and 43% in perennial ryegrass. V-10029 caused unacceptable levels of discoloration (> 20%) in all turfgrass species, and discoloration increased with increasing rates of application. Patterns of growth suppression for tall fescue, Kentucky bluegrass, and perennial ryegrass, in response to V-10029 at all rates and to trinexapac-ethyl, were similar on a percent of suppression basis. Growth of creeping bentgrass was suppressed by V-10029 only at high rates. In contrast, creeping red fescue was significantly injured by V-10029 at all rates. The greatest growth suppression, in response for all treatments, occurred 2 to 3 wk after application. The effect of trinexapac-ethyl dissipated after 4 wk, while V-10029 was effective until 5 to 7 wk after treatment. Observed effects of V-10029 were consistent with its activity as an ALS-inhibiting herbicide and, therefore, as a Class D turfgrass growth regulator.

Type
Research
Copyright
Copyright © 1998 by the Weed Science Society of America 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Literature Cited

Diesburg, K. L. and Christians, N. E. 1989. Seasonal application of ethephon, flurprimidol, mefluidide, paclobutrazol, and amidochlor as they affect Kentucky bluegrass shoot morphogenesis. Crop Sci. 29:841847.CrossRefGoogle Scholar
Hoffman, K. G. and Ilnicki, R. D. 1989. Triasulfuron in combination with some growth regulators in turf. Proc. Northeast. Weed Sci. Soc. 43:76.Google Scholar
Hopkins, W. L. 1994. Global Herbicide Directory. Indianapolis, IN: Ag Chem Information Services. p. 80.Google Scholar
Johnson, B. J. 1989a. Response of tall fescue (Festuca arundinacea) to plant growth regulators and mowing frequency. Weed Technol. 3:5459.CrossRefGoogle Scholar
Johnson, B. J. 1989b. Response of tall fescue (Festuca arundinacea) to plant growth regulator application dates. Weed Technol. 3:408413.CrossRefGoogle Scholar
Johnson, B. J. 1992. Response of bermudagrass (Cynodon spp.) to CGA 163935. Weed Technol. 6:577582.CrossRefGoogle Scholar
Johnson, B. J. and Murphy, T. R. 1996. Suppression of a perennial subspecies of annual bluegrass (Poa annua spp. reptans) in a creeping bentgrass (Agrostis stolonifera) green with plant growth regulators. Weed Technol. 10:705709.Google Scholar
Lim, J. S., Bae, Y. T., Lee, J. H., and Koo, S. J. 1997. Mode of acetolactate synthase inhibition of the new herbicide LGC-40863. Weed Sci. Soc. Am. Abstr. 37:169.Google Scholar
McCarty, L. B., DiPaola, J. M., Lewis, W. M., and Gilbert, W. B. 1985. Tall fescue response to plant growth retardants and fertilizer sources. Agron. J. 77:476480.CrossRefGoogle Scholar
Sawyer, C. D. and Jagschitz, J. A. 1989. Evaluation of ACP-2110 as a turfgrass growth regulator. Proc. Northeast. Weed Sci. Soc. 43:9899.Google Scholar
Schott, P. E., Will, H., and Nolle, H. H. 1980. Turfgrass growth reduction by means of a new plant growth regulator. In Beard, J. B., ed. Proceedings of the 3rd International Turfgrass Research Conference, Munich, Germany. Madison, WI: American Society of Agronomy. pp. 325328.Google Scholar
Spak, D. R., DiPaola, J. M., Lewis, W. L., and Anderson, C. E. 1993. Tall fescue sward dynamics: II. Influence of four plant growth regulators. Crop Sci. 33:304310.Google Scholar
Watschke, T. L. 1985. Turfgrass weed control and growth regulation. In Lemaire, F., ed. Proceedings of the 5th International Turfgrass Research Conference, Avignon, France. July 1–5. Paris: National Institute of Research Agronomists. pp. 6380.Google Scholar
Watschke, T. L. and DiPaola, J. M. 1995. Plant growth regulators. Golf Course Manage. 64:5962.Google Scholar
Watschke, T. L., Prinster, M. G., and Brueninger, J. M. 1992. Plant growth regulators and turfgrass management. In Waddington, D. V. et al., eds. Turfgrass Science. Agron. Monogr. 32. Madison, WI: American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America. pp. 557588.Google Scholar