Full TGIF Record # 3022
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Publication Type:
Author(s):Dunn, J. H.; Das, N. P.; Hemphill, D. D.
Author Affiliation:Dunn: Assistant Professor; Das: Graduate Student; Hemphill: Professor, Department of Horticulture, University of Missouri, Columbia
Title:Chemical control of yellow nutsedge in a mixed lawn turf of Common Kentucky bluegrass and tall fescue
Section:Weed control in horticultural crops and turf
Other records with the "Weed control in horticultural crops and turf" Section
Meeting Info.:Kansas City, Missouri: December 7-9, 1971
Source:Proceedings: North Central Weed Control Conference. Vol. 26, 1971, p. 89.
# of Pages:1
Publishing Information:[Urbana, Illinois: Department of Agronomy, University of Illinois]
Keywords:TIC Keywords: Poa pratensis; Festuca arundinacea; Cyperus esculentus; 2,4-D; MSMA; Dicamba; Mecoprop
Abstract/Contents:"A field study of chemical control of yellow nutsedge in turf was conducted during 1971, on a mixed Common Kentucky bluegrass - tall fescue lawn area at University of Missouri, Columbia. Chemicals used in the study were 2,4-D amine, MSMA + surfactant, MSMA + 2,4-D, 2,4-D + dicamba, 2,4-D + MCPP + dicamba, and an experimental formulation from 3M Company, MBR 6033. These materials were sprayed on plots at three to four week intervals beginning on May 20, 1971, when young nutsedge shoots were about 1 inch high. Each material as applied at the rates shown in Table 1 either twice (May 20, June 15) or four times (May 20, June 15, July 12, August 5) during late spring and summer. An exception was 2,4-D, which was applied only on the four-application schedule. In addition to these treatments, alachlor was applied to turf as a 'pre-emergence' treatment on May 13, and June 15, 1971. The term 'pre-emergence' is used liberally in this instance because a few nutsedge plants were beginning to emerge by May 13, and a large nutsedge population was present at the time of the second application of alachlor on June 15. The population of yellow nutsedge shoots in plots treated with 2,4-D at a rate of 2 lb/A, and both low and high rates of MSMA, MSMA + 2,4-D, 2,4-D + dicamba, and 2,4-D + MCPP + dicamba was reduced to an average of about one-third or less of that of check plots. Four applications of these herbicides gave nutsedge control which was about twice as effective as two applications. Nutsedge control with arsonate-containing herbicides was generally effective, however, two applications of MSMA at the rate of 4 lb/A of MSMA + 2,4-D at a rate of 4 + 1 lb/A did not give adequate control. Permanent turf was injured by these same materials at the rates indicated and competition to surviving nutsedge plants was therefore reduced. This may have encouraged nutsedge to spread in turf when no further chemical control was used. 'Pre-emergence' treatments with alachlor did not give satisfactory nutsedge control although the 6 lb/A rate of application was more effective than the 3 lb/A rate. Failure to apply alachlor well in advance of emergence of nutsedge shoots in spring may have contributed to this result. Moderate to severe injury to permanent turf occurred following applications of MSMA at a rate of 4 lb/A, MSMA +2,4-D at 4 + 1 lb/A, and MBR 6033 at 3 lb/A. Injury to permanent turf was judged as being slight to moderate when these chemicals were applied at lower rates of application. The average effect of four applications of all chemicals was to cause more serious injury to turf than two applications. Turf may have been more susceptible to injury at the time of the third and fourth chemical applications because of higher maximum daily air temperatures and generally lower soil moisture (turf was not irrigated during the study) compared with more favorable environmental conditions earlier in the study. Plots treated with 2,4-D, 2,4-D + dicamba, 2,4-D + MCPP + dicamba, and alachlor showed little to no injury during the study."
Note:This item is an abstract and tables only!
See Also:Other items relating to: 2, 4 - D in Turf
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Dunn, J. H., N. P. Das, and D. D. Hemphill. 1971. Chemical control of yellow nutsedge in a mixed lawn turf of Common Kentucky bluegrass and tall fescue. Res. Rep. North Cent. Weed Control Conf. 26:p. 89.
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