Full TGIF Record # 13997
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Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):Coats, G. E.; Anderson, D. H.; Heering, D. C.
Author Affiliation:Mississippi State
Title:Evaluation of Imidazolinone Herbicides in Warm Season Turfgrass.
Source:Southern Weed Science Society Proceedings. Vol. 39, January 1986, p. 111.
Publishing Information:Nashville, TN: Southern Weed Science Society.
Keywords:TIC Keywords: Cyperus rotundus; Cynodon; Zoysia; Herbicides; Trifolium repens; Cerastium Holosteoides; Taraxacum officinale; Oxalis stricta; Lamium amplexicaule; Digitaria ischaemum; Veronica arvensis; Imidazolinone herbicides
Abstract/Contents:"Imidazoline herbicides showed potential for control of weeds in warm season turfs. Single postemergence applications of imazaquin at 0.56 or 0.84 kg/ha gave 70 to 80% control of purple nutsedge (Cyperus rotundus) in bermudagrass (Cynodon dactylon L. Pers.) and hybrid bermudagrasses (C. dactylon x C. transvaalensis Burtt-Davy 'Tifgreen' and 'Tifdwarf'). Purple nutsedge control was better at 2 to 3 weeks after treatment when a combination of imazaquin + 2.24 kg/ha MSMA was used, compared to imazaquin, but imazaquin alone tended to be as efficacious as the mixture when rated 4 to 5 weeks, or later, after treatment. A given level of purple nutsedge control was maintained longer as imazaquin rate increased from 0.28 to 0.84 kg/ha. Control of purple nutsedge was poor with a single application of 2.24 kg/ha of MSMA or preemergence applications of imazaquin at rates up to 0.84 kg/ha. Temporary discoloration of bermudagrass was observed occasionally, but usually disappeared within 2 to 3 weeks, especially with imazaquin-MSMA combination. No injury was observed on zoysiagrass (Zoysia japonica Stend 'Meyer'), St. Augustinegrass [Stenotaphrum secundatum (Walt) kuntze 'Raleigh'] and centipedegrass [Eremochloa ophiuroides (Munro) Hack.] when maintained as home and/or sod productions turfs. In field and/or greenhouse evaluations, imazaquin showed potential for postemergence control of the following weeds in turf: white clover, mouseear chickweed, dandelion, broadleaf dock, yellow woodsorrel, riceflat sedge, yellow nutsedge and henbit. Smooth crabgrass and Southern crabgrass have exhibited tolerance to imazaquin either as a preemergence or postemergence trestment. Corn speedwell also exhibited a high level of tolerance to postemergence applications of imazaquin. Imazapyr at 0.03 to 0.14 kg/ha applied in mid-March gave better control of white clover, mouseear chickweed and dandelion than AC 1900, AC 1910 or AC 1911 ( American Cyanamid) at 0.14 and 0.18, 0.09 and 0.14 and 0.09 and 0.14 kg/ha, respectively. Bermudagrass transition from dormancy to greenup was delayed 3 to 4 weeks by sulfometuron (0.07 kg/ha) but not by imazapyr or the AC compounds."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Coats, G. E., D. H. Anderson, and D. C. Heering. 1986. Evaluation of Imidazolinone Herbicides in Warm Season Turfgrass.. South. Weed Sci. Soc. Proc. 39:p. 111.
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