Full TGIF Record # 25345
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Web URL(s):http://www.wsweedscience.org//wp-content/uploads/proceedings-archive/1992.pdf#page=89
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Content Type:Abstract or Summary only
Author(s):Cudney, D. W.; Downer, J. A.; Henry, M. J.; Gibeault, V. A.
Author Affiliation:Weed Science Specialist, Turfgrass Farm Advisors, and Turfgrass Specialist, University of California
Title:Multiple herbicide treatments for the restoration of kikuyugrass infested perennial rye/kentucky bluegrass swards
Meeting Info.:March 10-12, 1992; Salt Lake City, Utah
Source:Proceedings of the Western Society of Weed Science. Vol. 45, 1992, p. 78-79.
# of Pages:2
Publishing Information:Logan, UT: Plant Science Dept., Utah State University.
Keywords:TIC Keywords: Pennisetum clandestinum; Postemergence herbicides; Fumigation; Herbicide phytotoxicity; Poa pratensis; Lolium perenne; Weed control
Abstract/Contents:"Kikuyugrass is an extremely aggressive perennial weed of turf. In warm, temperate areas where it is well adapted (the coastal areas of southern and central California) it rapidly invades desirable turf swards, completely engulfing them with its thick, coarse thatch. Current control measures such as fumigation with mehtyl bromide require loss of use of the turf area, after fumigation, while new desirable species such as Kentucky bluegrass or perennial rye are reestablished and can cost as much as $1200/A. The purpose of these trials was to evaluate several postemergence herbicides, applied in sequential treatments to weaken and gradually reduce the kikuyugrass portion of a mixed population with a resultant increase in desirable cool-season species (Kentucky bluegrass and perennial ryegrass). This would allow a gradual conversion of kikuyugrass infested swards back to desirable species without loss of use of the area. Two trials were established in the coastal region of southern California in the cities of Camarillo and Huntington Beach. Prior to treatment, both swards consisted of approximately 85% kikuyugrass and 15% mixed Kentucky bluegrass and perennial ryegrass. MSMA (2 lb/A), triclopyr (0.5 lb/A), quinclorac (0.5 lb/A), fenoxaprop (0.18 lb/A), and mixes of triclopyr plus MSMA, quinclorac plus MSMA, and triclopyr plus quinclorac were evaluated as single and multiple applications. The multiple applications were made at 4 week intervals (four applications were made for all but the fenoxaprop plots, which received only three treatments). Each treatment was replicated four times. Applications were iniated on July 15 in Camarillo and on August 15 in Huntington Beach. Kikuyugrass control and Kentucky bluegrass/perennial ryegrass phytotoxicity evaluations were made at 2 week intervals after the first treatment. The effect of treatment was similar for both locations. One application of any of the herbicides or herbicide combinations did not effect kikuyugrass beyond initial, temporary phytoxicity. After four applications, MSMA, triclopyr, and fenoxaprop had reduced kikuyugrass to less than 3% of the sward. None of the treatments was significantly phytotoxic to the Kentucky bluegrass or the perennial rye. It is apparent from these trials that sequential applications of these herbicides were effective in reducing the density of kikuyugrass in mixed swards, while not injuring desirable cool season grass species, and that combinations of the herbicides increased this desirable effect."
Note:This item is an abstract only!
See Also:Other items relating to: KIKUYU
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Cudney, D. W., J. A. Downer, M. J. Henry, and V. A. Gibeault. 1992. Multiple herbicide treatments for the restoration of kikuyugrass infested perennial rye/kentucky bluegrass swards. Proc. West. Soc. Weed Sci. 45:p. 78-79.
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    Last checked: 05/04/2017
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