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| Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2006 Proceedings-SWSS.pdf#page=183
Last checked: 07/18/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Murphree, T. A.;
Rodgers, C. A.;
Umeda, K.;
Towers, G. W. |
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| Author Affiliation: | Muphree and Rodgers: Seeds West Inc., Maricopa, AZ; Umeda and Towers: University of Arizona Cooperative Extension, Phoenix, AZ |
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| Title: | Postemergence herbicide effects on establishment of seeded bermudagrass turf |
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| Section: | Weed management in turf grass
Other records with the "Weed management in turf grass" Section
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| Meeting Info.: | San Antonio, Texas: January 23-25, 2006 |
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| Source: | Proceedings: Southern Weed Science Society 59th Annual Meeting. Vol. 59, 2006, p. 110. |
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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: Cynodon dactylon; Establishment stage; Herbicide evaluation; Herbicide safety; Postemergence herbicides; Seeding
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| Abstract/Contents: | "The new planting and establishment of seeded bermudagrass can be a challenge because of competition with grass and broadleaf weeds. Postemergence (POST) herbicides can be used to help control weeds in seeded bermudagrass, but most POST herbicide are limited to applications made after the second mowing due to the risk of injury to immature bermudagrass. Many new herbicides can be applied POST but safety of early timing has not been fully determined for applications during establishment of seeded bermudagrass. The objective of this study was to determine how soon POST herbicides can be applied safely to newly seeded bermudagrass. This study was performed in 2004 and 2005 at the University of Arizona Maricopa Agricultural Center, located in Maricopa, AZ. POST herbicide applications were made to bermudagrass cv. Princess 77 which was planted at 1 lb/1000 ft2. Treatments for the study were foramsulfuron at 0.019 and 0.054 lb ai/A, trifloxysulfuron at 0.0094 and 0.028 lb ai/A, sulfosulfuron at 0.065 and 0.188 lb ai/A, flazasulfuron at 0.018 and 0.047 lb ai/A, rimsulfuron at 0.024 and 0.063 lb ai/A, chlorsulfuron at 0.046 and 0.138 lb ai/A, metsulfuron at 0.0094 and 0.024 lb ai/A, halosulfuron at 0.062 lb ai/A, diclofop at 0.75 and 1.0 lb ai/A, quinclorac at 0.75 lb ai/A and dithiopyr at 0.18 lb ai/A. Herbicide treatments were applied at three timings which were 14, 21, and 35 days after planting (DAP). Plot size was 3 by 5 feet and all treatments were applied using a CO2 backpack sprayer calibrated to deliver 103 GPA. Herbicide injury evaluations for each timing were made at 2, 4, and 6 weeks after treatment. For most rating dates the year by herbicide by timing interactions were significant therefore years were analyzed separately. Injury to bermudagrass was most severe when herbicides were applied at 14 DAP. In 2004, at 2 WAT diclofop at both rates and flazasulfuron and chlorsulfuron at the high rate were most injurious (37 to 60%). The high rate of sulfosulfuron and metsulfuron and the low rate of chlorsulfuron, halosulfuron, and dithiopyr caused noticeable injury (20 to 33%). At 4 WAT, injury from most treatments decreased. At 6 WAT, all treatments were safe except for chlorsulfuron which still showed injury (20%). At 21 DAP, early ratings showed that sulfosulfuron and diclofop at both rates and chlorsulfuron, quinclorac, and dithiopyr showed injury (up to 28%). At 4 WAT, only chlorsulfuron at the high rate caused significant injury (22%). By 6 WAT, the bermudagrass did not show any injury. In 2005 at the 14 DAP timing and when rated 2 and 4 WAT, sulfosulfuron at both rates and chlorsulfuron and metsulfuron at the high rate were most injurious (30 to 48%). By 6 WAT, chlorsulfuron at the high rate was the only treatment which caused injury (22%). At 21 DAP, at the early rating date sulfosulfuron, chlorsulfuron, and flazasulfuron at both rates and metsulfuron at the high rate showed significant injury (up to 35%). By 4 WAT only chlorsulfuron at the high rate showed unacceptable injury (32%). At 6 WAT, all treatments were safe. In both years at 35 DAP good safety was observed for all herbicide treatments at all rating dates. These data suggests that at labeled rates foramsulfuron, rimsulfuron, and trifloxysulfuron could be applied safely to seeded bermudagrass cv. Princess 77 at all application timings observed in this study. Results from this study also indicate that seeded bermudagrass cv. Princess 77 can tolerate most of the above herbicide applications under optimum growing conditions after a period of time." |
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| Language: | English |
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| References: | 0 |
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| Note: | "Vision for the future"
This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Murphree, T. A., C. A. Rodgers, K. Umeda, and G. W. Towers. 2006. Postemergence herbicide effects on establishment of seeded bermudagrass turf. South. Weed Sci. Soc. Proc. 59:p. 110. |
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| Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2006 Proceedings-SWSS.pdf#page=183
Last checked: 07/18/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: b2207931 |
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