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Relative Foliar Uptake of a Tank Mixture of 2,4-D and Dicamba by Wheat

Published online by Cambridge University Press:  12 June 2017

Allan J. Cessna*
Affiliation:
Agric. Canada Res. Stn., Regina, SK, Canada S4P 3A2

Abstract

Leaf washing was used to determine relative rates of uptake of 2,4-D and dicamba dimethylamine salts by wheat following field application of a postemergence tank mixture (3:1) of 476 g ae ha-1 at the 4- to 5-leaf growth stage. Foliar herbicide deposits and total acid residues in the crop were determined the day of spraying as well as 2 and 7 d after spraying. Leaf washing of foliage samples collected on the day of spraying indicated that the crop/weed canopy intercepted 51% of the application, and that dicamba was taken up more quickly than 2,4-D. Within a few hours of spraying, approximately 80% of the deposited dicamba and 65% of 2,4-D were taken up by the crop. A 35-mm rain during the first 48 h after application reduced plant surface deposits of both herbicides by more than 98%. During this 2-d period, dicamba residues within the crop were metabolized more quickly than those of 2,4-D. There was little difference in effectiveness among water, 10% methanol, 25% methanol, or 90% methanol in removing plant surface deposits of 2,4-D and dicamba from wheat.

Type
Special Topics
Copyright
Copyright © 1994 by the Weed Science Society of America 

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References

Literature Cited

1. Anonymous. 1983. Pages 129 and 152 in Herbicide Handbook of the Weed Science Society of America. 5th ed. Weed Sci. Soc. Am., Champaign, IL.Google Scholar
2. Anderson, M. D. and Arnold, W. E. 1985. Rainfall effects on desmedipham and phenmedipham performance. Weed Sci. 33:391394.Google Scholar
3. Behrens, R. and Elakkad, M. A. 1981. Influence of rainfall on the phytotoxicity of foliarly applied 2,4-D. Weed Sci. 29:349355.Google Scholar
4. Broadhurst, N. A., Montgomery, M. L., and Freed, V. H. 1986. Metabolism of 2-methoxy-3,6-dichlorobenzoic and (dicamba) by wheat and bluegrass plants. J. Agric. Food Chem. 14:585588.Google Scholar
5. Caseley, J. C. and Coupland, D. 1980. Effect of simulated rain on retention, distribution, uptake, movement and activity of difenzoquat applied to Avena fatua . Ann. Appl. Biol. 96:111118.Google Scholar
6. Cessna, A. J. 1992. Comparison of extraction/hydrolysis procedures for the determination of acidic herbicides in plants: Residues of mecoprop in barley following postemergence application. J. Agric. Food Chem. 40:11541157.Google Scholar
7. Cessna, A. J. and Muir, D.C.G. 1991. Photochemical transformations. Pages 199263 in Environmental Chemistry of Herbicides. Vol. II. Grover, R., and Cessna, J. A., eds, CRC Press, Boca Raton, FL, USA.Google Scholar
8. Cessna, A. J. and Hunter, J. H. 1992. Residues of 2,4-D and dicamba in wheat following postemergence application as a tank mixture. Can. J. Plant Sci. 73:345349.Google Scholar
9. Chang, F. Y. and Vanden Born, W. H. 1971. Dicamba uptake, translocation, metabolism, and selectivity. Weed Sci. 19:113117.CrossRefGoogle Scholar
10. Devine, M. D., Bestman, H. D., Hall, C., and Vanden Born, W. H. 1984. Leaf wash techniques for estimation of foliar absorption of herbicides. Weed Sci. 32:418425.Google Scholar
11. Doran, D. L. and Andersen, R. N. 1975. Effects of simulated rainfall on bentazon activity. Weed Sci. 23:105109.Google Scholar
12. Grover, R., Shewchuk, S. R., Cessna, A. J., Smith, A. E., and Hunter, J. H. 1985. Fate of 2,4-D iso-octyl ester after application to a wheat field. J. Environ. Qual. 14:203210.Google Scholar
13. Grover, R., Cessna, A. J., and Kerr, L. A. 1985. Procedure for the determination of 2,4-D and dicamba in inhalation, dermal, hand-wash, and urine samples from spray applicators. J. Environ. Sci. Health B20:113128.Google Scholar
14. Hatzios, K. K. 1991. Biotransformations of herbicides in higher plants. Pages 141185 in Environmental Chemistry of Herbicides. Vol. II. Grover, R. and Cessna, A. J., eds. CRC Press, Boca Raton, FL, USA.Google Scholar
15. Wolf, T. M., Grover, R., Wallace, K., Shewchuk, S. R., and Maybank, J. 1992. Effect of protective shields on drift and deposition characteristics of field sprayers. Pages 2949 in Wolf, T. M. and Grover, R., eds. The Role of Application Factors in the Effectiveness and Drift of Herbicides: Final Report (Agriculture Development Fund Project No. ADF-R-0412). Agric. Can. Res. Stn., Regina, Saskatchewan, Canada.Google Scholar
16. Merkle, M. G. and Davis, F. S. 1967. Effect of moisture stress on absorption and movement of picloram and 2,4,5-T in beans. Weeds 15:1012.Google Scholar
17. Smith, A. E., Grover, R., Cessna, A. J., Shewchuk, S. R., and Hunter, J. H. 1986. Fate of diclofop-methyl after application to a wheat field. J. Environ. Qual. 15:234238.Google Scholar