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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Simpkins, C. L.;
McCully, W. G. |
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| Author Affiliation: | Texas Transportation Institute, College Station |
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| Title: | Sethoxydim as a growth regulator for bermudagrass (Cynodon dactylon [L.] Pers.) |
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| Meeting Info.: | San Antonio, TX: January 14-16, 1991 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 44, 1991, p. 309. |
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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: Cynodon dactylon; Sethoxydim; Sulfometuron; Herbicides; Growth regulators; Roadside turf; Adsorption
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| Abstract/Contents: | "Bermudagrass (Cynodon dactylon (L.) Pers.) is a herbaceous plant that reproduces by both seed and vegetative means. Bermudagrass spreads rapidly and forms a dense sod, which makes this plant competitive with other species for water and soil nutrients (1). Bermudagrass was introduced from Africa to the United States as a warm season forage grass. Regardless of its esthetic value, bermudagrass is a serious problem for highway maintenance engineers. Mowing is a significant item in a maintenance budget; plant growth regulators (PGR's) may extend the life of a single mowing cycle and may be especially useful in mowed safety strips along the pavement. Herbicides for bermudagrass are most commonly used around fixtures and along pavement edges to facilitate high speed mowing. Sethoxydim {2-[1-(ethoxyimino)-butyl]-5-[2-(ethylthio)- propyl]-3-hydroxy-2-cyclohexene-1-one} selectively controls many annual and perennial grassy weeds in nearly all broadleaf crops for food and nonfood use. The site of action in grasses is the meristematic region. Efficacy can be increased by including an oil concentrate in the spray solution. Rainfall one hour or more after treatment does not reduce grass control. Adsorption and leaching characteristics in basic soil types are dependent on the organic matter content rather than the pH or cation exchange capacity. Adsorption constants are low. Soil studies have shown that soil microbes facilitate the breakdown of sethoxydim. Loss from volatilization is minimal. Efficacy is not dependent upon soil persistence, but soil activity prevents germination of grasses immediately after application. Sulfometuron 2-[[[[(4,6-dimethyl-2-pyrimidnyl) amino]carbonyl]amino]sulfonyl]benzoic acid is absorbed through the leaves from post-emergence applications. The compound can enter the plant either by foliar or root uptake. The plant growth is suppressed and stopped by arresting cell division in the growing tips of roots and shoots. Mobility increases with a low soil pH and decreases with soil organic matter. The preferred pH is 5.2. Activity of soil microorganisms will increase the rate of breakdown. Photodecomposition and/or volatilization are not of significance under field conditions. The persistence in various soils is increased by cool temperatures, low soil moisture levels and higher pH values (2)." |
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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):
Simpkins, C. L., and W. G. McCully. 1991. Sethoxydim as a growth regulator for bermudagrass (Cynodon dactylon [L.] Pers.). South. Weed Sci. Soc. Proc. 44:p. 309. |
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MSU catalog number: SB 611 .S6 |
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