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| Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2009 Proceedings-SWSS.pdf#page=459
Last checked: 07/25/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Willis, J. B.;
Goddard, M. J.;
Askew, S. D. |
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| Author Affiliation: | Turfgrass Weed Science, Virginia Tech, Blacksburg, VA |
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| Title: | Low rate velocity combinations for Poa control in bentgrass |
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| Section: | Turf and ornamentals
Other records with the "Turf and ornamentals" Section
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| Meeting Info.: | Orlando, Florida: February 9-12, 2009 |
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| Source: | 2009 Proceedings, Southern Weed Science Society. Vol. 62, 2009, p. 387. |
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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: Agrostis stolonifera; Application rates; Bispyribac-sodium; Cultivar evaluation; Flurprimidol; Herbicide combinations; Herbicide evaluation; Herbicide injury; Poa annua control
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| Cultivar Names: | Penncross |
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| Trade Names: | Velocity |
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| Abstract/Contents: | "Annual bluegrass (Poa annua L.) is a troublesome weed in creeping bentgrass (Agrostis stolonifera L.) on golf course fairways. Bispyribac-sodium (Velocity Herbicide) can be used to control annual bluegrass. Several practitioners have observed excessive injury and reduction in turf color and quality during annual bluegrass control with bispyribac sodium. Herbicide rate and environmental conditions at application time has been shown to influence both annual bluegrass and creeping bentgrass response. Our objective is to evaluate low bispyribac sodium rates at 2 application scenarios in combination with products that have potential to reduce creeping bentgrass injury and improve turfgrass quality during annual bluegrass control. This field trial was established on a 'Penncross'creeping bentgrass fairway at Blacksburg Country Club near Blacksburg, Virginia maintained at 13 mm. Plot size was 2 by 2 m and experimental design was randomized complete block with treatments replicated 4 times. Treatment arrangement was a 2 by 5 factorial. Two application scenarios were 4 applications at monthly intervals or 2 applications at a 2 week interval followed 2 months later with 2 applications at a 2 week interval. Five combinations with bispyribac sodium (Velocity 80SP) at 25 g ai/ha were none, chelated iron (Sprint 330) at 610 g/ha, V-10142 at 325 g ai/ha, flurprimidol (Cutless 50 WP) at 280 g ai/ha, and trinexapac ethyl (Primo Maxx) at 97 g ai/ha. Initial application was made on July 9, 2008. Data collected included percent cover, control/injury of annual bluegrass and/or creeping bentgrass and turfgrass color. Overall, bispyribac sodium was not significantly injurious to creeping bentgrass. Only one application date lead to injury levels above 30%, all other applications did not lead to unacceptable injury. Injury peaked 1 week after treatment and completely recovered by 2 weeks after treatment. None of the tank-mixtures alleviated injury to creeping bentgrass consistently over the course of the trial regardless of application scenario. Annual bluegrass control was not significantly affected by any of the tank-mixture partners. Short-term annual bluegrass control was positively influenced by mixing bispyribac sodium with flurprimidol, however the differences were not statistically significant at p = 0.05. Additionally, analysis of annual bluegrass cover 3 months after the last application did not reveal statistical separation for bispyribac sodium containing treatments regardless of tank-mix partner or application scenario. All treatments containing bispyribac sodium did significantly reduce annual bluegrass population. Data from this trial indicate that bispyribac sodium applied 4 times throughout the summer significantly reduces annual bluegrass populations. Significant injury to 'Penncross' creeping bentgrass was not consistently eliminated by tank-mixture with any of the tested products. Turf managers should remain aware that environment drastically influences creeping bentgrass injury with bispyribac sodium." |
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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):
Willis, J. B., M. J. Goddard, and S. D. Askew. 2009. Low rate velocity combinations for Poa control in bentgrass. South. Weed Sci. Soc. Proc. 62:p. 387. |
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| Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2009 Proceedings-SWSS.pdf#page=459
Last checked: 07/25/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: b2207931 |
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