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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Taylor, J. M.;
Coats, G. E.;
Hutto, K. C. |
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| Author Affiliation: | Department of Plant and Soil Sciences, Mississippi State University, Mississippi State, Mississippi |
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| Title: | Pre and post control of annual bluegrass |
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| Section: | Weed management in field, pasture, and rangeland
Other records with the "Weed management in field, pasture, and rangeland" Section
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| Meeting Info.: | 55th Annual Meeting, Atlanta, GA: January 28-30, 2002 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 55, 2002, p. 69. |
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| Publishing Information: | Champaign, IL: Southern Weed Science Society. |
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| # of Pages: | 1 |
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| Abstract/Contents: | "PRE and POST control of annual bluegrass experiments were initiated in 2000 and 2001. Herbicide treatments were applied on fairways at two golf courses. Studies were conducted at Starkville (triazine-resistant biotype) and Macon (triazine susceptible biotype), MS. The first POST experiment was at both locations, and treatments were applied February 23, 2001 to 10-tiller annual bluegrass. The best treatment at both locations was 0.035 lb ai/A rimsulfuron, which controlled annual bluegrass 83 to 90% 60 days after treatment (DAT). Azafenidin at 0.5 to 0.75 lb ai/A controlled annual bluegrass 70 to 73% at Starkville and 90% at Macon. Control with 0.05 to 0.1 lb ai/A sulfosulfuron was 5 to 23% at Starkville and 53 to 75% at Macon. Imazaquin also provided less control at the Macon location with 0.375 to 0.5 lb ai/A controlling annual bluegrass 10 to 18%, while at Starkville 48 to 75% control was observed. Clethodim at 0.28 lb ai/A provided 60 to 70% control while 0.5 lb ai/A pronamide controlled annual bluegrass 13% at Starkville and 55% at Macon. Control with glufosinate at 0.5 to 1.0 lb ai/A or glyphosate at 0.375 to 0.75 lb ai/A did not differ at each location with 68 to 85% control at Starkville and 55 to 70% control at Macon. Diquat was applied at 0.25 to 0.5 lb ai/A and did not control annual bluegrass more than 25%. The second POST experiment was initiated at Macon on February 1, 2001 to evaluate rimsulfuron for control of annual bluegrass. Rimsulfuron was applied at 0.004, 0.008, 0.017, or 0.035 lb ai/A. Rimsulfuron treatments were applied with 0.5% v/v methylated seed oil. Pronamide was also applied at 0.5 lb ai/A for comparison. At 55 DAT, 0.008 lb/A or greater rimsulfuron or pronamide controlled annual bluegrass 83% or greater while 0.004 lb/A rimsulfuron only provided 65% control. At 83 DAT, 0.017 lb/A or greater rimsulfuron or pronamide controlled annual bluegrass 88% or greater and 0.008 lb/A or less rimsulfuron controlled annual bluegrass 68 to 40%. None of the rimsulfuron treatments delayed common bermudagrass regrowth following dormancy. A 5 to 10% increase in bermudagrass density following rimsulfuron treatments was observed at 55 DAT compared to the untreated plots, while at 83 DAT a 20 to 27% increase in bermudagrass density was observed following rimsulfuron treatments as compared to the untreated. In the PRE experiment which was conducted at both Starkville and Macon, initial applications of 0.5 or 0.25 lb ai/A dithiopyr, 0.75 or 0.375 lb ai/A prodiamine, 3.0 or 1.5 lb ai/A pendimethalin, or 3.0 or 1.5 lb ai/A oryzalin were applied in August. These initial applications were followed by no sequential treatment or the lower rate was applied sequentially in October, November, December, January, or February. Increased control was observed when sequential applications were made October through December compared to the single applications made in August. However, sequential applications made in October or November provided better control of annual bluegrass than sequential applications made after November (72% control compared to 61% with December sequentials). Control decreased when sequential applications were made January or February compared to applications made prior to December." |
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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):
Taylor, J. M., G. E. Coats, and K. C. Hutto. 2002. Pre and post control of annual bluegrass. South. Weed Sci. Soc. Proc. 55:p. 69. |
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MSU catalog number: SB 611 .S6 v.54 |
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