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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Boyd, J. W. |
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| Author Affiliation: | University of Arkansas, Little Rock, AR |
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| Title: | Use of herbicides for weed control during turfgrass establishment |
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| Meeting Info.: | 51st Annual Meeting, Birmingham, AL, January 26-28, 1998 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 51, 1998, p. 83-84. |
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| Publishing Information: | Champaign, IL: Southern Weed Science Society. |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Preemergence herbicides; Weed control; Turfgrass establishment; Golf courses; Usage; Cynodon; Zoysia; Stenotaphrum secundatum; Application rates
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| Abstract/Contents: | "Preplant herbicide use offers an opportunity for broad spectrum perennial weed control before establishing turfgrasses. While expensive and time consuming, nonselective products such as methyl bromide or dazomet are excellent for controllng hard to kill weeds on critical sites such as putting greens. Because few herbicides are labeled for use on putting greens, preplant fumigation is the preferred approach to weed control on these high value sites. Glyphosate, while less effective than methyl bromide, is a good preplant weeed control option. It is better suited to tees, fairways and roughs. Glyphosate is frequently used during conversion or renovation of turfgrass sites. It may be used to kill weeds or to eliminate exisiting turfgrass before planting another variety or species. Glyphosate is a standard treatment for common bermudagrass control on a fairway before establishing hybrid bermudagrass or zoysiagrass. A single application of glyphosate will not control bermudagrass. Three applications of glyphosate at 1.5 to 2.0 lb al/A are needed to achieve greater than 90% control. Preplant control of bermudagrass is essential because there are no good selective control options. A typical spray schedule when using glyphosate is applying in May, June and August. It is important to allow regrowth of bermudagrass between applications because glyphosate is effective only on actively growing vegetation. Even multiple applications of glyphosate will not control some established prennial weeds such as yellow and purple nutsedge. Oxadiazon offers the best combination of safety and effective preemergence weed control when establishing turfgrasses vegetatively. It has consistently been the top performer in many sprigging studies across the southern region. Oxadiazon does not effect rooting whereas the majority of preemergence herbicides used in turfgrass inhibit cell division in the root tips. Recommended rates of oxadiazon are 2.0 to 3.0 lb ai/A applied immediately before or after sprigging. Typically, this injury does not slow establishment. Burn may be avoided by applying immediately before sprigging or using the granular formulation. The label cautions against soil disturbance after application so, applying after sprigging, would avoid disrupting the herbicide layer. Atrazine or simazine may be used at 1.0 lb ai/A when establishing warm season grasses from plugs or sprigs. These herbicides are safe to use with zoysiagrass, St. Augustinegrass, centipede grass or bermudagrass. They are less effective for annual grass control than oxadiazon but are better for broadleaf control. Both herbicides will control many broadleaf and grass weeds. Atrazine had more broadleaf activity while simazine tends to be more effective on grasses. Some foliar absorption occurs with atrazine but simazine is only taken up though the roots. These products offer only about 30 days of residual weed control so it may be necessary to make a second application. Do not make a second application less than 30 days after the first. MSMA is a good postemergence option when establishing zoysiagrass and bermudagrass from sprigs. Most weedy grasses, with the exception of goosegrasss and tufted lovegrass, are easily controlled by MSMA if treated in the 1 to 4 leaf stages of growth. A 1.0 lb ai/A rate is usually suffiecient for small weeds. If the grassy weeds have begun to tiller, a 2.0 lb ai/A rate may be required. Two to three applications of MSMA may be needed during establishment. Halosulfuron is a postemergence sedge control herbicide with excellent turfgrass safety. It may be used at 0.031 to 0.062 lb ai/A to control yellow and purple nutsedge and kyllinga during sprigging of warm season grasses. It is important to add 0.25 to 0.5% nonionic surfactant to halosulfuron. It may be used in conjunction with oxadiazon, atrazine, simazine or MSMA to improve control of sedges. Control of weeds other than sedges is very limited. Establishment weed control in seeded turfgrasses is very difficult. Siduron may be used when seeding bluegrass, ryegrass, fescue and 'Pencross' bentgrass to control crabgrass and foxtail. It is ineffective on annual bluegrass and goosegrass. Rates for siduron are 2.0 to 6.0 lb ai/A. Repeat applications may be made one month later. Do not use siduron on bermudagrass." |
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| Language: | English |
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| References: | 0 |
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| See Also: | Other items relating to: MEBR |
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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):
Boyd, J. W. 1998. Use of herbicides for weed control during turfgrass establishment. South. Weed Sci. Soc. Proc. 51:p. 83-84. |
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MSU catalog number: SB 611 .S6 v.51 |
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