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Publication Type:
| Report |
Content Type: | Abstract or Summary only |
Author(s): | Cargill, L. M.;
Martin, D. L.;
Montgomery, D. P. |
Author Affiliation: | Department of Horticulture and Landscape Architecture, Oklahoma State University, Stillwater, Oklahoma |
Title: | Efficacy of several herbicides for annual weed control in roadside bermudagrass turf |
Meeting Info.: | Little Rock, AR; January 21-22, 1992 |
Source: | Southern Weed Science Society Proceedings. Vol. 45, January 1992, p. 285. |
Publishing Information: | Champaign, IL: Southern Weed Science Society. |
# of Pages: | 1 |
Keywords: | TIC Keywords: Roadside turf; Weed control; Herbicides; Cynodon; Sulfometuron
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Abstract/Contents: | "Annual weeds along highway rights-of-way are a major concern for the Oklahoma Department of Transportation's (ODOT) roadside vegetation management program. If left untreated, they not only become an eyesore, but necessitate mowing early in the growing season to minimize seed production and further competition to the desirable roadside turf. The recent loss of the product, atrazine, which was the major herbicide used by ODOT for annual weed control along roadsides, has required research efforts to immediately focus on finding a replacement herbicide(s) having a similar spectrum of weed control and a reasonable monetary cost. A field study was initiated during March 1991 in northeastern Oklahoma to evaluate the efficacy of thirteen herbicide treatments for the selective control of annual grasses and broadleaf weeds in roadside bermudagrass turf. The experimental design was a randomized complete block with three replications. Treatments included norflurazon at 0.4, 0.8, and 1.6 lbs. ai./A, atrazine at 2.0 lbs. ai./A, primisulfuron at 0.14 lb. ai./A, diuron at 2.4 lbs. ai./A , sulfometuron plus diuron at 0.024 + 1.0 lb. ai./A, sulfometuron plus metribuzin at 0.024 + 0.19 lb. ai./A, sulfometuron plus chlorsulfuron at 0.024 + 0.047 lb. ai./A, sulfometuron plus metsulfuron at 0.024 + 0.038 lb. ai./A, pendimethalin at 1.0 lb. ai./A and oryzalin at 2.0 lbs. ai./A. All treatments, with the exceptions of norflurazon, pendimethalin and oryzalin, were combined with the surfactant, X-77, at a rate of 0.25% v/v. Treatments were applied to five feet by five feet plots using a Co(2) powered, hand-held boom sprayer applying a carrier rate of 20 GPA. Visual ratings were made at 1, 2, 3, and 4 MAT (month after treatment) for control of annual grasses, broadleaf weeds and bermudagrass phytotoxicity. Ratings at 1, 2, 3, and 4 MAT indicated significantly better control of both annual grasses and broadleaf weeds with treatments of atrazine, diuron, primisulfuron and the combination treatments of sulfometuron with diuron, metribuzin, chlorsulfuron and metsulfuron. At 4 MAT, atrazine was exhibiting the best annual grass and broadleaf weed control, with only marginal control provided with treatments of diuron, primisulfuron and the combination treatments of sulfometuron with other herbicides. Treatments of norflurazon, pendimethalin and oryzalin were significantly less effective and did not provide an acceptable level of either annual grass or broadleaf weed control during this experiment. Significant bermudagrass phytotoxicity was observed at 1 MAT with treatments of primisulfuron and all combination treatments of sulfometuron with diuron, metribuzin, chlorsulfuron and metsulfuron. However, by 2 MAT, no bermudagrass phytotoxicity was observed in any treatment." |
Language: | English |
References: | 0 |
Note: | This item is an abstract only! |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Cargill, L. M., D. L. Martin, and D. P. Montgomery. 1992. Efficacy of several herbicides for annual weed control in roadside bermudagrass turf. South. Weed Sci. Soc. Proc. 45:p. 285. |
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