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| Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2004%20Proceedings-SWSS.pdf#page=211
Last checked: 07/17/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Belcher, J. L.;
Walker, R. H.;
Cooper, M. |
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| Author Affiliation: | Agronomy and Soils, Auburn University, Auburn, AL |
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| Title: | Velocity for Poa annua control in perennial ryegrass |
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| Section: | Weed management in turf crops
Other records with the "Weed management in turf crops" Section
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| Meeting Info.: | Memphis, Tennessee: January 26-28, 2004 |
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| Source: | Proceedings: Southern Weed Science Society: 57th Annual Meeting. Vol. 57, 2004, p. 113. |
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| Publishing Information: | Champaign, Illinois: Southern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Acetolactate synthase-inhibiting herbicides; Bispyribac-sodium; Herbicide efficacy; Herbicide evaluation; Lolium perenne; Poa annua control
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| Trade Names: | Velocity |
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| Abstract/Contents: | "Choices for postemergence control of annual bluegrass (Poa annua var. annua; POANN) in overseeded bermudagrass (Cynodon dactylon) are limited. Concerns associated with products currently available for this purpose include injury to the ryegrass (Lolium perenne; LOLPE) and/or bermudagrass as well as delays in spring greenup. Velocity (bispyribac sodium) is under development by Valent Corporation for selective postemergence control of annual bluegrass from perennial ryegrass. A study was initiated to evaluate Velocity for postemergence control of annual bluegrass in overseeded bermudagrass. Research was conducted fall 2002-spring 2003 at Auburn Turfgrass Research Unit with the following variables: bispyribac rates of 0.066, 0.132 and 0.264 lb ai/A; applications were single, double or triple. Single applications were applied 2/11 or 3/25; double was applied 2/11 + 3/7 or 2/11 + 3/25; triple was 2/11 + 3/7 + 3/25. Fairway Master perennial ryegrass was seeded at 300 lb/A into a Tifway bermudagrass sod managed as a golf course fairway. The bermudagrass turf was scalp mowed and perennial ryegrass was broadcast seeded on 10-23-02. The area has a natural infestation of POANN that can be characterized as high density and excellent uniformity. Perennial ryegrass and POANN were always at mowed canopy height of 0.75 inch when Velocity was applied. POANN was in very early flower, mid-flower and full flower at time of the three respective application dates in the non-treated plots. All herbicide applications were applied in a volume of 30 gallons/A and no adjuvant was included. Data collection included visual evaluations over time of POANN control and LOLPE injury. Tifway bermudagrass was evaluated on 5/7/03 to determine if Velocity affected spring transition. Velocity injury to LOLPE was generally <30% (slight) with 0.066 and 0.132 lb/A rates with occasional injury to 40% (moderate) with the 0.264 lb/A rate. Injury was generally 20% or less in 3 weeks after bispyribac application. It was difficult to visually separate ryegrass chlorosis from POANN chlorosis. Commercially acceptable control of POANN was obtained with the triple application of 0.066 lb/A rate (21-day interval) and the double application of 0.132 lb/A rate (42-day interval). POANN seed heads were reduced to 10% or less with a single early application. However, if not retreated, regrowth occured. Percent green Tifway bermudagrass increased with later applications of bispyribac and when triple applications were made. Observations of the plots on 1/16/04 (non-overseeded) showed significant residual control (reduced infestations) of POANN with all treatments that received a triple application and with double applications that totaled at least 0.198 lb/A of Velocity" |
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| Language: | English |
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| References: | 0 |
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| Note: | "The changing world of weed science"
This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Belcher, J. L., R. H. Walker, and M. Cooper. 2004. Velocity for Poa annua control in perennial ryegrass. South. Weed Sci. Soc. Proc. 57:p. 113. |
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| Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2004%20Proceedings-SWSS.pdf#page=211
Last checked: 07/17/2013
Requires: PDF Reader
Notes: Item is within a single large file |
| 
MSU catalog number: b2207931 |
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