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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Hutto, K. C.;
Coats, G. E.;
Taylor, J. M.;
Arnold, J. C. |
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| Author Affiliation: | Mississippi State University, MS |
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| Title: | The evaluation of annual bluegrass (Poa annua L.) control in overseeded and non-overseeded bermudagrass |
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| Section: | Section I: Weed management in agronomic crops
Other records with the "Section I: Weed management in agronomic crops" Section
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| Meeting Info.: | 54th Annual Meeting, Biloxi, Mississippi: January 22-24, 2001 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 54, 2001, p. 16. |
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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: Dithiopyr; Application timing; Overseeding; Poa annua control; Residual effects; Cynodon; Crabgrass control; Lolium perenne; Poa trivialis; Poa annua; Plant density; Prodiamine; Application rates
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| Cultivar Names: | VIP; Sabre II |
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| Abstract/Contents: | "An experiment was initiated at the Plant Science Research Center at Mississippi State University on August 04, 1999 to evaluate the effect of dithiopyr application dates on overseeding safety, annual bluegrass control, and the residual effects of these fall applications on bermudagrass density and crabgrass control the following spring. Four replications in a randomized complete block design with a factorial arrangement of treatments were used. The overseeding cultivars used were 'VIP' perennial ryegrass at a rate of 8 lb/1000 ft2 and 'Sabre II' roughstalk bluegrass at a rate of 3 lb/1000 ft2. The rate of annual bluegrass used was 1.6 lb/1000 ft2. The plot size used was 5 by 10 feet. Each plot contained separate strips of perennial ryegrass, roughstalk bluegrass, and annual bluegrass. The annual bluegrass was overseeded on August 4, and the cool season turfgrasses were seeded on November 11. Annual bluegrass density ratings were based on counts/ft2, while density of the overseeding cultivars and bermudagrass were estimated visually. Southern crabgrass control ratings were based on a scale of 0-100% control where 0% is no control. The treatments were 0.5 lb (1 EC) and 0.5 lb ai/A dithiopyr on fertilizer (0.25 G) and 0.75 lb ai/A prodiamine (65 WG). All herbicides were applied as single treatments 12 weeks prior to overseeding [WPO (August 4), 8 WPO (September 1), or 4 WPO (October 1)]. Although the germination of annual bluegrass was extremely poor, no significant differences were observed for all treatments with annual bluegrass control compared to the untreated 5 months after overseeding (MAO). Dithiopyr (0.25 G) at 0.5 lb/A or 0.75 lb/A prodiamine applied 4 WPO significantly decreased perennial ryegrass density compared to the untreated 2 MAO. A decrease in roughstalk bluegrass density was also observed 2 MAO for all treatments applied 4 WPO compared to the untreated. The residual effects of all treatments applied 4 WPO significantly increased bermudagrass density compared to the untreated 42 weeks after initial treatment [WAIT (May 25, 2000)]. Also, the fall applications of 0.5 lb/A dithiopyr (0.25 G) as well as the 0.75 lb/A prodiamine applied 8 or 4 WPO controlled crabgrass 65 to 83% compared to 30 to 40% for the 12 WPO application 55 WAIT (August 25, 2000)." |
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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):
Hutto, K. C., G. E. Coats, J. M. Taylor, and J. C. Arnold. 2001. The evaluation of annual bluegrass (Poa annua L.) control in overseeded and non-overseeded bermudagrass. South. Weed Sci. Soc. Proc. 54:p. 16. |
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MSU catalog number: SB 611 .S6 v.54 |
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