Full TGIF Record # 63376
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Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):Edenfield, M. W.; Brecke, B. J.; Unruh, J. B.
Author Affiliation:West Florida Research and Education Center, Jay, FL
Title:The influence of turfgrass herbicides on purple nutsedge (Cyperus rotundus) dynamics
Section:Posters
Other records with the "Posters" Section
Meeting Info.:52nd Annual Meeting, Greensboro, NC, January 25-27, 1999
Source:Southern Weed Science Society Proceedings. Vol. 52, 1999, p. 249.
# of Pages:1
Publishing Information:Champaign, IL: Southern Weed Science Society.
Keywords:TIC Keywords: Cyperus rotundus; Weed control; Herbicides; Herbicide evaluation; Tubers; Growth; Reproduction; Metolachlor; Preemergence herbicides; Sulfentrazone; Application rates; Halosulfuron; Imazaquin; MSMA; Mowing height
Abstract/Contents:"Purple nutsedge (Cyperus rotundus) has been identified as one of the most common and troublesome weeds in turf throughout the southeastern US. This perennial plant generally produces numerous seed, but dispersal is primarily by bulbs and chains of tubers since only a fraction of the seed are viable. Conventional purple nutsedge control in turf generally includes multiple herbicide applications. However, effective control is limited because many tubers remain dormant on the tuber chain of actively growing plants thus reducing translocation of many herbicides. There is a lack of information available concerning long-term effects of herbicide treatments on purple nutsedge growth and reproductive ability. This study was conducted to evaluate the impact of selected turfgrass herbicides on purple nutsedge growth and reproductive ability (tuber production). The experiment was conducted the summer of 1997 and 1998 at the University of Florida West Florida Research and Education Center located near Jay, FL. The study was established in an area naturally infested with purple nutsedge but without turfgrass. Test plots were 10 by 20 ft and were replicated 4 times. Herbicide treatments included an untreated check, metolaochlor PRE at 4.0 lb/A, sulfentrazone PRE at 0.38 lb/A, halosulfuron EP at 0.06 lb/A, imazaquin EP at 0.38 lb/A, MSMA LP at 2.0 lb/A, sulfentrazone PRE at 0.38 lb/A followed by (fb) sulfentrazone EP at 0.13 lb/A, halosulfuron EP at 0.6 lb/A fb halosulfuron LP at 0.03 lb/A, imazaquin EP at 0.38 lb/A fb imazaquin LP at 0.38 lb/A, and MSMA EP at 2.0 lb/A fb MSMA LP at 2.0 lb/A. In addition, each treatment was either left unmowed or mowed at 1.5 in. Data collected included visual weed control ratings where 0 = no weed control and 100 = total weed control. Tuber population was quantified by separating tubers from 0.75 ft² by 1 ft deep in volume of soil from each plot. Extracted tubers were counted, weighted, planted in soil, and placed in a greenhouse environment to test viability. In general, sequential herbicide applications provided better control of both purple nutsedge shoots and tubers than single applications. Halosulfuron and sulfentrazone were the most effective against purple nutsedge foliage providing $85% control. Mowing had little impact on purple nutsedge foliar control, however, early season tuber density was reduced by mowing. Herbicides had less impact on tuber production than on above ground growth. Both sulfentrazone and MSMA applied sequentially reduced purple nutsedge tuber production by 80 to 85%. The other treatments reduced tuber number by less than 60%. Sulfentrazone was also effective in reducing tuber viability."
Language:English
References:0
Note:This item is an abstract only!
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Edenfield, M. W., B. J. Brecke, and J. B. Unruh. 1999. The influence of turfgrass herbicides on purple nutsedge (Cyperus rotundus) dynamics. South. Weed Sci. Soc. Proc. 52:p. 249.
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