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Publication Type:
| Refereed |
Author(s): | Harrison, S. Kent;
Wax, Loyd M. |
Author Affiliation: | Grad. Res. Asst., Department of Agronomy, University of Illinois and Agric. Res. Serv., U. S. Department of Agriculture, Urbana, IL |
Title: | The Effect of Adjuvants and Oil Carriers on Photodecomposition of 2,4-D, Bentazon, and Haloxyfop |
Source: | Weed Science. Vol. 34, No. 1, January 1986, p. 81-87. |
Publishing Information: | Champaign, IL: Weed Science Society of America |
Keywords: | TIC Keywords: Additives; Bioassay; Herbicide degradation; 2,4-D; Bentazon; Haloxyfop
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Abstract/Contents: | "Laboratory photolysis rates of 2,4-D [(2,4-di-chlorophenoxy)acetic acid], bentazon [3-(1-methylethyl) - (1H) - 2,1,3-benzothiadiazin -4(3H) -one 2,2-dioxide], and haloxyfop {2-[4-[[3-chloro-5- (trifluoromethyl) -2-pyridinyl] oxy] phenoxy] propanoic acid} in dilute aqueous solution were enhanced by the presence of adjuvants. Addition of 1.0% (v/v) pertoleum oil concentrate (POC), 1.0% (v/v) soybean oil concentrate (SBOC), and 0.15% (v/v) emulsifier package (EP) enhanced herbicide photolysis rates more than addition of 0.15% (v/v) oxysorbic (20 POE) (polyoxyethylene sorbitan monolaurate). Bioassays showed that phytotoxicity or photolyzed herbicide solutions was negatively correlated with time of exposure to ultraviolet light. Addition of 0.85% (v/v) acetophenone to aqueous herbicide solutions containing 0.15% (v/v) oxysorbid strongly sensitized photodegradation of 2,4-D, and to a lesser extent, haloxyfop. Acetophenone had no effect on bentazone photolysis in the presence of oxysorbic. In another study, herbicides were dissolved in white mineral oil or once-refined soybean oil and exposed to ultraviolet light. After a 6-h exposure, there was 92% loss of haloxyfop in mineral oil and 36 % loss in soybean oil. There was no difference between oils in affecting the photolysis rate of 2,4-D or bentazon." |
Language: | English |
References: | 22 |
See Also: | Other items relating to: 2, 4 - D in Turf |
Note: | Figures |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Harrison, S. K., and L. M. Wax. 1986. The Effect of Adjuvants and Oil Carriers on Photodecomposition of 2,4-D, Bentazon, and Haloxyfop. Weed Sci. 34(1):p. 81-87. |
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