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Comparison of Flazasulfuron to Pyridine Herbicides for Virginia Buttonweed (Diodia Virginiana) Control

Published online by Cambridge University Press:  20 January 2017

Kendall C. Hutto ,
Barry J. Brecke  and
J. Bryan Unruh
Kendall C. Hutto
Affiliation:
University of Florida–IFAS, West Florida Research and Education Center, 4253 Experiment Dr., Jay, FL 32565
Barry J. Brecke*
Affiliation:
University of Florida–IFAS, West Florida Research and Education Center, 4253 Experiment Dr., Jay, FL 32565
J. Bryan Unruh
Affiliation:
University of Florida–IFAS, West Florida Research and Education Center, 4253 Experiment Dr., Jay, FL 32565
*
Corresponding author's E-mail: bjbe@ifas.ufl.edu
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Abstract

Virginia buttonweed is a difficult-to-control weed in southern turfgrass. Typically, auxin-type herbicides are considered to be the standard treatment for this species. Field experiments were conducted to compare the efficacy of flazasulfuron, a sulfonylurea herbicide, to pyridine herbicides on Virginia buttonweed. Treatments included single and sequential applications of flazasulfuron (0.05 or 0.08 kg ai/ha). The sequential applications were applied 3 and 6 wk after initial treatment (WAIT). Three applications of 0.05 and 0.08 kg/ha flazasulfuron controlled Virginia buttonweed greater than 93% at 10 WAIT. Both treatments were comparable to 0.6 kg ai/ha triclopyr + 0.2 kg ai/ha clopyralid (80% control). These studies indicated that increased application of flazasulfuron increased Virginia buttonweed control regardless of application rates evaluated.

Keywords

Clopyralid, flazasulfuron, triclopyr, bermudagrass Cynodon dactylon (L.) Pers. ×Cynodon transvaalensis Burtt-Davy ‘Tifway 419’, Virginia buttonweed, Diodia virginiana L. DIQVISulfonylureabermudagrasstriclopyrclopyralid
Type
Notes
Information
Weed Technology , Volume 22 , Issue 2 , June 2008 , pp. 351 - 353
Copyright
Copyright © Weed Science Society of America 

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