Full TGIF Record # 56571
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Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):Adcock, T. E.; Kalmowitz, K. E.; Walls, R. F.; Birk, J. H.
Author Affiliation:American Cyanamid Co., Perry, GA, Columbia, SC, Goldsboro, NC, and Princeton, NJ
Title:Use of imazapic for centipedegrass management
Meeting Info.:51st Annual Meeting, Birmingham, AL, January 26-28, 1998
Source:Southern Weed Science Society Proceedings. Vol. 51, 1998, p. 79-80.
Publishing Information:Champaign, IL: Southern Weed Science Society.
# of Pages:2
Keywords:TIC Keywords: Imazapic; Eremochloa ophiuroides; Application rates; Discoloration; Vertical growth; Shoot density; Seedhead inhibition; Herbicide resistance
Abstract/Contents:"Imazapic is a herbicide developed by American Cyanamid Company for use in unimproved turf. It is a member of the imidazolinone family of chemistry and can be applied to several grass species including bermudagrass, bahiagrass, fescue, and centipedegrass. The current labeled use patterns for imazapic include weed control, seedhead suppression, prairiegrass revovation and restoration, and wildflower establishment and maintenance. In order to evaluate the utility of imazapic on centipedegrass in improved turf situations (lawns, turf farms, etc.), imazapic was applied to seven established centipedegrass stands troughout Georgia, North Carolina, and South Carolina in 1995, 1996, and 1997. Applications were made postemergence during the summer months between June 9 and August 13 using CO₂ powered sprayers. All applications included a nonionic surfactant at 0.25% v/v and were made in water volumes from 20 to 41 gallons per acre. Trials were conducted using a randomized complete block design with three or four replications. The tested imazapic rates included 0.032, 0.047, 0.063, 0.094, and 0.125 lbs. of active ingredient per acre. Evaluations were made visually at four and eight weeks after application. The parameters evaluated were percent decrease in color, percent decrease in height, percent decrease in stand, and percent seedhead suppression. Only a slight (5% or less) decrease in centipedegrass color was noted at any tested imazapic rate at four or eight weeks after treatment. Imazapic had minimal impact on centipedgrass height with maximum decrease of 17% observed with the highest (0.125 lbs. a.i./A) tested rate at both four and eight weeks after treatment. No decrease in centipedegrass stand was noted with any tested imazapic rate. Imazapic suppressed centipedegrass seedheads from 22 to 73% at four weeks after treatment and from 4 to 60% at eight weeks after treatments. Seedhead suppression increased with increasing imazapic rate. This research indicates that established centipedegrass has excellent tolerance to postemergence applications of imazapic. Additional research and development could lead to potential new use patterns such as weed control in improved centipedegrass, renovation of bahiagrass turf to centipedegrass turf, and establishment of unimproved centipedegrass. Imazapic may not be suited to use in centipedegrass seed production or establishment of centipedegrass in improved turf situations."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Adcock, T. E., K. E. Kalmowitz, R. F. Walls, and J. H. Birk. 1998. Use of imazapic for centipedegrass management. South. Weed Sci. Soc. Proc. 51:p. 79-80.
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