Hostname: page-component-586b7cd67f-dsjbd Total loading time: 0 Render date: 2024-11-26T19:05:12.929Z Has data issue: false hasContentIssue false
  • English
  • Français

Torpedograss (Panicum repens) Control with Quinclorac in Bermudagrass (Cynodon dactylon × C. transvaalensis) Turf

Published online by Cambridge University Press:  20 January 2017

Barry J. Brecke ,
J. Bryan Unruh  and
Joan A. Dusky
Barry J. Brecke*
Affiliation:
University of Florida, West Florida Research and Education Center, Jay, FL 32565
J. Bryan Unruh
Affiliation:
University of Florida, West Florida Research and Education Center, Jay, FL 32565
Joan A. Dusky
Affiliation:
Extension, University of Florida, 1038 McCarty Hall, Gainesville, FL 32611
*
Corresponding author's E-mail: [email protected].
Get access Rights & Permissions [Opens in a new window]

Abstract

Torpedograss is a serious problem in southern turfgrass, especially along the U.S. gulf coast. Studies were conducted during 1998, 1999, and 2000 to evaluate quinclorac for torpedograss control in bermudagrass turf. Three applications of quinclorac at 0.6 kg/ha spaced 21 d apart provided better torpedograss control (88%) than two applications at 0.8 kg/ha (69%) or one application at 1.7 kg/ha (69%). Two applications of quinclorac (0.8 kg/ha) plus diclofop (0.8 kg/ha) provided better torpedograss control (82%) than either herbicide applied alone when evaluated after a single season of application. Increasing the mowing interval prior to quinclorac application to allow for more foliage to be present did not improve control. Nitrogen application prior to quinclorac treatment did not improve torpedograss control. Long-term control will most likely require quinclorac applications for more than one season.

Keywords

Diclofopquincloracbermudagrass, Cynodon dactylon (L.) Pers. × C. transvaalensis Burtt-Davey ‘Tifway’torpedograss, Panicum repens L. # PANREApplication frequencycultural practicesmowing intervalnitrogen fertilityturfgrassLSD, least significant differencePOST, postemergenceWAIT, weeks after initial treatment
Type
Research
Information
Weed Technology , Volume 15 , Issue 4 , December 2001 , pp. 732 - 736
Copyright
Copyright © 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

Grossman, K. 1998. Quinclorac belongs to a new class of highly selective auxin herbicides. Weed Sci. 63: 707–716.CrossRefGoogle Scholar
Holm, L. D., Plucknett, D. L., Pancho, J. B., and Herberger, J. B. 1977. The World's Worst Weeds. Distribution and Biology. Honolulu, HI: University Press of Hawaii. 609 p.Google Scholar
Hossain, M. A., Akamine, H., Murayama, S., and Kuniyoshi, K. 1999. Effect of burial depth on emergence of Panicum repens . Weed Sci. 47: 651–656.CrossRefGoogle Scholar
Johnson, B. J. 1995a. Frequency of Drive (quinclorac) treatments on common bermudagrass tolerance and on large crabgrass control. J. Environ. Hortic. 13: 104–108.CrossRefGoogle Scholar
Johnson, B. J. 1995b. Frequency of quinclorac treatments on bermudagrass tolerance and large crabgrass control. J. Turf Manag. 1: 49–59.Google Scholar
Koo, S. J., Neal, J. C., and Di Tomaso, J. M. 1994. Quinclorac-induced electrolyte leakage in seedling grasses. Weed Sci. 42: 1–7.CrossRefGoogle Scholar
McCarty, L. B., Higgins, J. M., and Colvin, D. L. 1993. Selective torpedograss (Panicum repens) control in bermudagrass (Cynodon spp.) turf. Weed Technol. 7: 911–915.Google Scholar
Murphy, T. R., McCarty, L. B., Hall, D., Colvin, D. L., Dickens, R., and Everest, J. W. 1992. Weeds of Southern Turfgrasses. Gainesville, FL: Florida Coop. Ext. Serv. 208 p.Google Scholar
Sutton, D. L. 1996. Growth of torpedograss from rhizomes planted under flooded conditions. J. Aquat. Plant Manag. 34: 50–53.Google Scholar
Wilcut, J. W., Dute, R. R., Truelove, B., and Davis, D. E. 1988. Factors limiting the distribution of cogongrass, Imperata cylindrica, and torpedograss, Panicum repens . Weed Sci. 36: 577–582.Google Scholar