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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Sciumbato, A. S.;
Chandler, J. M.;
Senseman, S. A.;
Bovey, R. W.;
Smith, K. L. |
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| Author Affiliation: | Sciumbato, Chandler, and Senseman: Texas Agricultural Experiment Station, College Station, TX; Bovey: Department of Rangeland Ecology and Management, Texas A&M University, College Station, TX; and Smith: BASF Corporation, Overton, TX. |
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| Title: | Volatility of the diglycolamine salt of dicamba |
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| Meeting Info.: | 51st Annual Meeting, Birmingham, AL, January 26-28, 1998 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 51, 1998, p. 76-77. |
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| Publishing Information: | Champaign, IL: Southern Weed Science Society. |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Dicamba; Volatility; Formulations; Auxins; 2,4-D; Triclopyr; Agriculture; Salts
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| Abstract/Contents: | "The use of auxin-like herbicides provides an excellent tool for broadleaf weed control in diverse management situations such as small grain production, rangeland, or turf. However, the risk of volatilization and subsequent off-target drift of these herbicides has led to restrictions on their use in many counties throughout Texas, placing an effective and economical method of weed control out of the reach of many producers. These herbicides could be more widely utilized if volatility was sufficiently reduced by formulation. In 1997 field studies were conducted at the Texas Aricultural Experiment Station field laboratory near College Station and the Texas A&M University Riverside campus to determine the volatility of the diglycolamine salt of dicamba relative to that of other formulations of auxin-like herbicides. First, injury curves were established by applying reduced rates ranging from 0.4x to 0.0001x of 2,4-D (Weedar 64), dicamba (Clarity) or triclopyr (Remedy) to cotton (Gossypium hirsutum L). Second, field volatility was studied by placing potted cotton plants onto 50' x 50' plots of grassland treated with 2x rates of 1) the dimethylamine salt of 2,4-D, 2) the diglycolamine salt of dicamba, or 3) the butoxyethyl ester formulation of triclopyr. These plants were exposed to the treated plots for 48 hours, then removed from the site and evaluated for 14 days. Weather data was also recorded during the field volatility studies. Visual injury data obtained from the injury curve study were used to develop a model equation that was then used to calculate the herbicide rate to which test plants were exposed in the field volatility studies. Field conditions favored herbicide volatility with daily high temperatures over 100°F given relative humidity varing from 30-70%. Significant injury to the test plants was observed in all treatments of the field volatility study. Of the three herbicides used, triclopyr-ester was most volatile causing injury equivalent to a 756 ppm solution or 0.124 times the field rate. Volatility of the diglycolamine salt of dicamba was not significantly different from that of the dimethylamine salt of 2,4-D with injury equivalents of 12 ppm and 0.57 ppm solutions respectively. These concentrations are equivalent to 0.0002 times the normal field rate of 2,4-D and 0.004 times the normal field rate of dicamba. These results suggest that under some field conditions the diglycolamine salt of dicamba does not appear to be less volatile than other salt formulations of auxin-like herbicides." |
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| Language: | English |
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| References: | 0 |
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| See Also: | Other items relating to: 2, 4 - D in Turf |
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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):
Sciumbato, A. S., J. M. Chandler, S. A. Senseman, R. W. Bovey, and K. L. Smith. 1998. Volatility of the diglycolamine salt of dicamba. South. Weed Sci. Soc. Proc. 51:p. 76-77. |
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MSU catalog number: SB 611 .S6 v.51 |
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