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| Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2009 Proceedings-SWSS.pdf#page=91
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): | Doroh, M. C.;
McElroy, J. S.;
Guertal, E. A. |
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| Author Affiliation: | Auburn Univ., Auburn, AL |
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| Title: | Triclopyr enhances metamifop and clodinafop control of bermudagrass and reduces zoysiagrass injury |
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| Section: | SWSS M. S. poster contest
Other records with the "SWSS M. S. poster contest" 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. 21. |
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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: Aryloxyphenoxypropionic herbicides; Bermudagrass control; Clodinafop; Cultivar evaluation; Cynodon dactylon; Fenoxaprop-ethyl; Golf greens; Herbicide evaluation; Metamifop; Research; Tank mix; Triclopyr; Zoysia matrella
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| Cultivar Names: | Tifway; Zorro |
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| Abstract/Contents: | "Zoysiagrass (Zoysia spp.) is a popular warm-season turfgrass used on golf courses in the southern United States. However, zoysiagrass contaminated with bermudagrass (Cynodon dactlyon (L.) Pers.) results in an undesirable turfgrass stand due to differences in color, texture, and growth habit. Bermudagrass is a difficult weed to control in zoysiagrass due to its aggressive growth habit and similarity as a C4 warm-season grass. Aryloxyphenoxypropionate (AOPP) herbicides have traditionally been used to suppress bermudagrass but at the detriment of excessive injury to zoysiagrass. Previous research indicates that tank-mixing AOPP herbicides with triclopyr increased bermudagrass control and decreased zoysiagrass injury. Research was conducted to evaluate other AOPP herbicides tank-mixed with triclopyr for their zoysiagrass safety and efficacy of bermudagrass control. Field studies were conducted in 2008 at the Auburn University Turfgrass Research Unit (TGRU) in Auburn, AL. Treatments were initiated to 'Zorro' zoysiagrass (Zoysia matrella (L.) Merr.) and 'Tifway' bermudagrass (Cynodon dactylon (L.) Pers. X Cynodon transvaalensis Burtt-Davy) on July 25, 2008. Treatments included clodinafop (0.07 kg ai/ha); triclopyr (1.12 kg ai/ha); clodinafop plus triclopyr (0.07 kg ai/ha + 1.12 kg ai/ha); fenoxaprop (0.10 kg ai/ha); fenoxaprop plus triclopyr (0.10 kg ai/ha + 1.12 kg ai/ha); metamifop (0.40 kg ai/ha); and metamifop plus triclopyr (0.40 kg ai/ha + 1.12 kg ai/ha). All treatments were applied with 0.25% v/v nonionic surfactant (NIS). Three applications were made at 21-day intervals. Zoysiagrass injury and bermudagrass control were visually rated weekly utilizing a 0-100% scale (0% = no visible turfgrass injury/control; 100% = complete turfgrass death; Injury >20% and bermudagrass control < 80% was deemed unacceptable). Digital images were taken 14 days after each application utilizing a light box equipped with a digital camera and analyzed using SigmaScan Pro (SPSS Inc., Chicago, IL.) for percent green cover, hue, saturation, and brightness. Each treatment was replicated 3 times in a randomized complete block design. Experimental units were 1.2 by 2.4 meters (4 by 8 feet). Herbicides were applied in a water carrier volume of 280 L/ha (30 GPA) with a CO2 pressurized sprayer and a 101.6 cm (40 inch) boom with a pressure of 125 kPa (18 PSI) equipped with four Tee Jet 8002 type nozzles at 25.4 cm (10 inch) spacing. Data were subjected to ANOVA (P = 0.05). Means were separated using Fisher's protected LSD (P = 0.05). Zoysiagrass injury, cover reduction, and bermudagrass control data discussed here were taken 62 days after initial treatment. Clodinafop injured zoysiagrass 45% and severely reduced cover to 55%; however, when tank-mixed with triclopyr, 0% injury and 98% cover was achieved. Clodinafop alone controlled bermudagrass 70%, but tank-mixed with triclopyr increased bermudagrass control to 93%. Fenoxaprop alone injured zoysiagrass 35% and reduced cover to 61%, but tank-mixed with triclopyr resulted in 0% injury and 97% cover. Fenoxaprop alone controlled bermudagrass 32%, but 95% control was achieved when fenoxaprop was tank-mixed with triclopyr. Metamifop moderately injured zoysiagrass 17% and reduced cover to 87%, but tank-mixed with triclopyr 0% injury and 97% cover was achieved. Metamifop was the only herbicide evaluated that did not cause unacceptable injury when applied alone to 'Zorro' zoysiagrass. Metamifop alone controlled bermudagrass 40%, but tank-mixed with triclopyr 95% control was achieved. Triclopyr alone caused no visual injury to zoysiagrass and maintained cover at 97%. Triclopyr controlled bermudagrass 51% and reduced cover to 27%. These data indicate that triclopyr safens the use of clodinafop, fenxoaprop, and metamifop when applied to 'Zorro' zoysiagrass and enhances bermudagrass control." |
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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):
Doroh, M. C., J. S. McElroy, and E. A. Guertal. 2009. Triclopyr enhances metamifop and clodinafop control of bermudagrass and reduces zoysiagrass injury. South. Weed Sci. Soc. Proc. 62:p. 21. |
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| Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2009 Proceedings-SWSS.pdf#page=91
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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