Full TGIF Record # 43016
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Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):Waltz, F. C.; Lowe, D. B.; Tucker, K. A.; Whitwell, T.
Author Affiliation:Department of Horticulture, Clemson University, Clemson, SC
Title:Bermudagass [Bermudagrass] control in tall fescue with triclopyr and fenoxaprop
Section:Papers and Abstracts Presented
Other records with the "Papers and Abstracts Presented" Section
Meeting Info.:49th Annual Meeting, Charlotte, NC, January 15-17, 1996
Source:Southern Weed Science Society Proceedings. Vol. 49, 1996, p. 67.
Publishing Information:Champaign, IL: Southern Weed Science Society.
# of Pages:1
Keywords:TIC Keywords: Cynodon dactylon; Festuca arundinacea; Triclopyr; Fenoxaprop-ethyl; Chemical control; Weed control; Herbicide combinations; Herbicide evaluation; Herbicides; Injuries; Trifolium repens; Application rates
Abstract/Contents:"Common bermudagrass can be a weed problem in tall fescue stands. Fenoxaprop is labeled for tall fescue, and will possibly control invading bermudagrass. Multiple applications of fenoxaprop may provide effective bermudagrass control in fescue. White clover is a weed problem in tall fescue, however triclopyr will control white clover with little adverse effects to tall fescue. A two year field study was initiated in May 1994 to determine if the combinations of triclopyr with fenoxaprop would improve bermudagrass control. In November 1995, a greenhouse study was initiated to determine synergism or antagonism with triclopyr/fenoxaprop combinations. At the South Carolina Botanical Gardens, a field study was initiated on an area of K-31 tall fescue with bermudagrass and white clover populations. The experimental design was a complete randomized block with 2 x 2 m plots replicated four times. Treatments were triclopyr 1.0 lb. ai/A, fenoxaprop 0.38 lb. ai/A, triclopyr 1.0 lb ai/A + fenoxaprop 0.38 lb. ai/A, and an untreated control. Plots were treated four times in 1994 and 1995 on monthly intervals beginning in May. Plots were maintained at 3 inches and visually evaluated monthly for bermudagrass control, white clover control, and fescue injury. Analysis of variance was used with means separated by LSD at P=0.05. For the greenhouse study, two inch common bermudagrass and K-31 tall fescue plugs were potted in 1 quart containers with soilless media. Bermudagrass and fescue plugs were allowed to acclimatize in the greenhouse for 1 month before application. Experimental design was a complete randomized block with five replications. Treatments included: triclopyr 0.5 and 1.0 lb. ai/A, fenoxaprop 0.125, 0.25, and 0.38 lb. ai/A, combinations of all rates, and an untreated control. Visual bermudagrass control evaluations were taken as well as fresh weight and dry weight data for bermudagrass and fescue. Percent inhibition was determined from dry weight data for synergism or antagonism calculations. Analysis of variance was used with means separated by LSD at P=0.05. In September 1994, the fenoxaprop + triclopyr combination provided the best bermudagrass control at 55% compared to fenoxaprop alone at 36%. Minimal fescue injury was observed, less than 10% for all treatments. In September 1995, the fenoxaprop alone and fenoxaprop + triclopyr provided greater than 80% bermudagrass control. The triclopyr alone and fenoxaprop + triclopyr combination provided 95% control of white clover. At 40 days after treatment all fenoxaprop alone and triclopyr + fenoxaprop combinations provided greater than 80% bermudagrass control with minimal injury to fescue. In accordance to Colby's formulae, it was determined that triclopyr was antagonistic in combination with fenoxaprop for bermudagrass dry weight after the first application. Although triclopyr provided no synergistic activity to fenoxaprop in bermudagrass control with the first treatment, bermudagrass regrowth may have a different response."
Language:English
References:0
Note:Tables
Graphs
This item is an abstract only!
Reprint appears in Clemson University Turfgrass Program, April 1996, p. 33
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Waltz, F. C., D. B. Lowe, K. A. Tucker, and T. Whitwell. 1996. Bermudagass [Bermudagrass] control in tall fescue with triclopyr and fenoxaprop. South. Weed Sci. Soc. Proc. 49:p. 67.
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