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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Coats, G. E.;
Heering, D. C.;
Scruggs, J. W. |
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| Author Affiliation: | Department of Plant Pathology and Weed Science, Mississippi State University |
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| Title: | Wild garlic and purple nutsedge control in turf |
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| Meeting Info.: | Orlando, FL: January 12-14, 1987 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 40, 1987, p. 98. |
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| Publishing Information: | Champaign, IL: Southern Weed Science Society. |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Cyperus rotundus; Allium vineale; Cynodon dactylon; Weed control; Imazaquin; Postemergence herbicides
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| Abstract/Contents: | "Research on weed control with imazaquin in turf has been conducted at Mississippi State University since 1983. Major effeorts have been directed toward purple nutsedge and wild garlic control. Postemergence applications of imazaquin have given 75% or higher purple nutsedge control for 7 to 9 weeks at rates of 0.56 kg ai/ha or higher. The addition of 2.2 kg ai/ha MSMA to imazaquin consistently gave faster burndown of purple nutsedge than imazaquin applied without MSMA, but control 5 weeks after application has been as good with imazaquin alone as with the combination. Preliminary studies indicate that two applications of imazaquin or imazaquin + MSMA 6 to 8 weeks apart could enable reduction of the rate of imazaquin per application to 0.42 kg/ha. Also, purple nutsedge densities in both a golf course fairway and driving range tee bermudagrass turf were significantly reduced the year following treatment. Control was maintained for 15 to 17 weeks in plots re-treated with a single application of 0.28 to 0.84 kg/ha imazaquin the second year (1986) compared to the 7 to 9 weeks observed for single applications in 1985. Imazaquin gave 90% or greater control of wild garlic with a single postemergence application of 0.56 kg/ka and was significantly better than a single application of 2,4-D or 2,4-D + mecroprop + dicamba. Three to five weeks were required for imazaquin to kill the shoots. However, regrowth of shoots above the turf canopy after the initial mowing following treatment with 0.56 kg/ha or higher rates of imazaquin did not occur for the remainder of the winter. Imazaquin applications in late October or February/March were equally effective for wild garlic control. Significant reductions in regrowth of wild garlic in the fall following a March treatment were observed. Early fall applications, prior to a killing frost, have given excellent control of wild garlic, but fall regrowth of common bermudagrass did not occur following treatment. However, no differences in the amount of bermudagrass regrowth in imazaquin versus the untreated plots was observed the following spring. Although no apparent permanent damage to common bermudagrass from early fall applications occurred, the aesthetic quality of the turf could be reduced for the period of time between an early frost and the final killing frost. This could be easily avoided by delaying application until after the bermudagrass is dormant. Better control of both purple nutsedge and wild garlic was obtained with equivalent rates of imazaquin applied postemergence versus preemergence." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Coats, G. E., D. C. Heering, and J. W. Scruggs. 1987. Wild garlic and purple nutsedge control in turf. South. Weed Sci. Soc. Proc. 40:p. 98. |
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MSU catalog number: SB 611 .S6 |
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