Hostname: page-component-78c5997874-ndw9j Total loading time: 0 Render date: 2024-11-19T05:41:05.286Z Has data issue: false hasContentIssue false
  • English
  • Français

Slender Speedwell (Veronica filiformis) Control in Cool-Season Turf with Quinclorac

Published online by Cambridge University Press:  12 June 2017

Joseph C. Neal  and
Andrew F. Senesac
Joseph C. Neal
Affiliation:
Dep. Floric. and Ornam. Hortic., Cornell Univ., Ithaca, NY 14853
Andrew F. Senesac
Affiliation:
Cornell Univ. Long Island Hortic. Res. Lab., Riverhead, NY 11901
Get access Rights & Permissions [Opens in a new window]

Abstract

Experiments were conducted to compare rates and formulations of quinclorac for postemergent control of slender speedwell in cool-season turf. A 50% ae wettable powder formulation (50WP) was compared with two granular formulations, a 1% clay granule (1G) and a 0.4% corn cob granule (0.4G). Each formulation was applied at 0.3, 0.6, 0.8, and 1.1 kg ha−1. Additionally, 2,4-D at 1.1 kg ha−1 was applied alone and in combination with quinclorac 50WP at 0.8 kg ha−1. Slender speedwell control with the 50WP or 0.4G formulations was superior to that obtained with the 1G. At lower rates, slender speedwell control with the 50WP was greater than with the 0.4G; however, the rates required to obtain 95% control were not significantly different. Tank mixing quinclorac 50WP at 0.8 kg ha−1 with 2,4-D at 1.1 kg ha−1 did not improve slender speedwell control but increased roughstalk bluegrass injury. Kentucky bluegrass, perennial ryegrass, and tall fescue were not injured by quinclorac. Roughstalk bluegrass and chewings fescue were temporarily discolored. Turf injury was rate-related and more severe with the 50WP than the 1G formulation.

Keywords

2,4-D, (2,4-dichlorophenoxy)acetic acidquinclorac (formerly BAS 514.H), 3,7-dichloro-8-quinolinecarboxylic acidslender speedwell, Veronica filiformis Sm. # VERFIchewings fescue, Festuca rubra var. commutata Gaud. ‘Jamestown’creeping bentgrass, Agrostis stolonifera L.Kentucky bluegrass, Poa pratensis L. ‘Nassau’perennial ryegrass, Lolium perenne L. ‘Repell’roughstalk bluegrass, Poa trivialis L.tall fescue, Festuca arundinacea Schreb. ‘Jaguar’Application rateBAS 514.H2,4-Dformulation comparisonGompertz distributionVERFI
Type
Research
Information
Weed Technology , Volume 7 , Issue 2 , June 1993 , pp. 390 - 395
Copyright
Copyright © 1993 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

1. Bates, D. M. and Watts, D. G. 1988. Comparing models: nested models. p. 103–104 in Bates, D. M. and Watts, D. G., eds. Nonlinear Regression Analysis and Its Applications. John Wiley & Sons, NY.CrossRefGoogle Scholar
2. Berghaus, R. and Wuerzer, B. 1987. The mode of action of the new experimental herbicide quinclorac (BAS 514 H). Proc. Asian Pac. Weed Sci. Soc. 11:81–87.Google Scholar
3. Cisar, J. L. 1981. Control of Veronica filiformis in turf. M.S. Thesis, Cornell Univ., Ithaca, NY. 53 p.Google Scholar
4. Colby, S. R. 1967. Calculating synergistic and antagonistic responses of herbicide combinations. Weeds 15:20–22.Google Scholar
5. Enache, A. J. and Ilnicki, R. D. 1991. BAS 514 and dithiopyr for weed control in cool-season turfgrasses. Weed Technol. 5:616–621.CrossRefGoogle Scholar
6. Haden, E., Menck, B. H., and Honecker, H. 1985. BAS 514.H—a new herbicide to control Echinochloa spp. in rice. Proc. Br. Crop Prot. Conf.—Weeds 1:77–83.Google Scholar
7. Johnson, N. L. and Kotz, S. 1970. Distributions in Statistics: Continuous Univariate Distributions, volume 2. John Wiley & Sons, NY. p: 271.Google Scholar
8. Kearns, C. M., Neal, J. C., and Senesac, A. F. 1990. The identification and control of perennial Veronica species in turf. Proc. Northeast. Weed Sci. Soc. 44:121.Google Scholar
9. Kelly, W. R. 1951. A Study of Seed Identification and Seed Germination of Potentilla spp. and Veronica spp. Ph.D. Thesis, Cornell Univ., Ithaca, NY. 68 p.Google Scholar
10. Kibler, E., Menck, B. H., and Rosebrock, H. 1987. Quinclorac—a new Echinochloa-herbicide for rice and an excellent partner for broad spectrum rice herbicides. Proc. Asian Pac. Weed Control Conf. 11:89–97.Google Scholar
11. Mower, R. G. 1959. Selective control of Veronica filiformis in turf. M.S. Thesis, Cornell Univ., Ithaca, NY. 99 p.Google Scholar
12. Neal, J. C. 1989. Veronica filiformis control in cool-season turfgrasses. Proc. Northeast. Weed Sci. Soc. 43:88–89.Google Scholar
13. Neal, J. C. 1991. Non-phenoxy herbicides for perennial broadleaf weed control in cool-season turf. Weed Technol. 4:555–559.Google Scholar
14. Neal, J. C. and Senesac, A. F. 1991. Ground ivy and healall control in turf. Proc. Northeast. Weed Sci. Soc. 45:120.Google Scholar
15. Sciarappa, W. J. 1991. BAS 514 H—approaches to selectivity and efficacy in bentgrass and bluegrass. Proc. Northeast. Weed Sci. Soc. 45:144.Google Scholar
16. Watschke, T. L. 1980. Re-encroachment by Veronica during 1979 into turf treated with herbicides during 1978. Proc. Northeast. Weed Sci. Soc. 34:366–367.Google Scholar