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Residues of Two Herbicides in Water in Irrigation Canals

Published online by Cambridge University Press:  12 June 2017

P. A. Frank ,
R. H. Hodgson  and
R. D. Comes
P. A. Frank
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture
R. H. Hodgson
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture
R. D. Comes
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture
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Abstract

Residues of 2,3,6-trichlorophenylacetic acid (fenac) and 2,6-dichlorobenzonitrile (dichlobenil) were determined in irrigation water flowing over canal-bottom plots treated with the herbicides prior to the entry of water. Concentrations of fenac and dichlobenil in the first water to flow over the entire treated plots were 8.82 and 8.63 ppm, respectively. The bulk of the residues was transported from the plots in a very short time, and safe levels were reached after 1 hr of water flow. The dichlobenil burden, picked up by water as it flowed over the treated plot, was effectively reduced as the water passed over untreated canal soil downstream.

Type
Research Article
Information
Weeds , Volume 15 , Issue 4 , October 1967 , pp. 353 - 355
Copyright
Copyright © 1967 Weed Science Society of America 

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References

Literature Cited

1. Erickson, L. C. and Hield, H. A. 1962. Determination of 2,4-dichlorophenoxyacetic acid in citrus fruit. J. Agr. Food Chem. 10:204–207.Google Scholar
2. Frank, P. A. 1961. Evaluation of soil-applied herbicides for control of submersed aquatic weeds in irrigation canals. Res. Prog. Rept. WWCC p. 87.Google Scholar
3. Frank, P. A., Hodgson, R. H., and Comes, R. D. 1963. Evaluation of herbicides applied to soil for control of aquatic weeds in irrigation canals. Weeds 11:124–128.Google Scholar