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Subaqueous Release of Herbicides from Granules

Published online by Cambridge University Press:  12 June 2017

Robt. E. Wilkinson
Robt. E. Wilkinson*
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, Middle Rio Grande Substation, Route 1, Box 28, Los Lunas, New Mexico 87031
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Abstract

Derivative of 2,4-dichlorophenoxyacetic acid (2,4-D), type of bottom sorbent, and application concentration affected the rate and quantity of 2,4-D released into water from attapulgite granules. All three factors were temperature dependent. Temperature, granule size, and solution pH affected the rate during short exposure periods, but not the total quantity of release of herbicide during 256 hours. Generally, decrease in temperature was associated with a decrease in rate of release of 2,4-D. Decrease in granule size slightly increased the rate of release. Increased acidity reduced the rate of release of 2,4-D acid. Types of attapulgite granules were not significantly different.

Rates of subaqueous release of eleven granular herbicides were measured at concentrations of 10, 15, and 20 μg ai/ml. Compounds tested were 2,4-D and its butoxyethanol ester (BE), propylene glycol butyl ether ester (PGBE), and isooctyl ester (IOE) derivatives, tris-(2,4-dichlorophenoxyethyl)phosphite, the IOE of 2,4,5-trichlorophenoxyacetic acid, the BE, PGBE, and potassium salt of 2-(2,4,5-trichlorophenoxy)propionic acid (silvex), the sodium salt of 2,3,6-trichlorobenzoic acid, and 2,3,6-trichlorophenylacetic acid (fenac). The rate of release of herbicides from granules varied from complete release of silvex potassium salt in 4 hours to less than 10 per cent release of 2,4-D IOE in 256 hours.

Information

Type
Research Article
Information
Weeds , Volume 12 , Issue 2 , April 1964, pp. 69 - 76
Copyright
Copyright © 1964 Weed Science Society of America 

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References

Literature Cited

1. Daniels, F., Matthews, J. H., Williams, J. W., Bender, P., Murphy, G. W., and Alberty, R. A. 1949. Experimental physical chemistry, pp. 50–54, 125–128, 242–281. McGraw-Hill Book Co., New York. 559 pages.Google Scholar
2. Greely, J. R. 1960. A new 2,4-D amine pellet for eradication of water chestnut. Proc. NEWCC 14:488–495.Google Scholar
3. Grigsby, B. H., Hamilton, R. H., and Smith, J. 1956. A new approach to the control of certain aquatic vegetation. Proc. NCWCC 13:30–31.Google Scholar
4. Grigsby, B. H. and Smith, J. 1956. Application of granular herbicides for the control of submersed weeds. Proc. NCWCC 13:40–41.Google Scholar
5. Lebrecque, G. C., Noe, J. R., and Gahan, J. B. 1956. Effectiveness of insecticides on granular clay carriers against mosquito larvae. Mosquito News 16:1–3.Google Scholar
6. LeClerg, E. L. 1957. Mean separation by the functional analysis of variance and multiple comparisons. U. S. Department of Agriculture, Agricultural Research Service Publ. ARS-20-3.Google Scholar
7. Mitchell, J. W., Livingston, G. A., and Marth, P. C. 1958. Test methods with plant-regulating chemicals. U. S. Department of Agriculture Handbook #126. Pp. 53–54.Google Scholar
8. Mulla, M. S. 1960. Criteria for selecting granular insecticides for vector control. California Mosquito Control Assoc., Proc. 28:27–29.Google Scholar
9. Mulla, M. S. 1960. Some factors regulating the effectiveness of granular insecticides in mosquito control. Mosquito News 20:262–267.Google Scholar
10. Mulla, M. S. 1960. Effectiveness of granular insecticides against eye gnats and mosquitoes as affected by toxicant concentrations. Mosquito News 20:363–367.Google Scholar
11. Mulla, M. S. and Axelrod, H. 1959. Granular formulations of insecticides and factors influencing their efficiency in mosquito control. California Mosquito Control Assoc., Proc. 27:79–83.Google Scholar
12. Mulla, M. S. and Axelrod, H. 1960. Efficiency of granulated insecticides influenced by solvents for impregnation. J. Econ. Entomol. 53:938–949.Google Scholar
13. Mulla, M. S. and Axelrod, H. 1960. Effect of temperature on rate of release of toxicants from granules and on breakdown of certain insecticides in water. Mosquito News 20:178–183.Google Scholar
14. Mulla, M. S. and Axelrod, H. 1962. The role of carriers in the performance of granular formulations of parathion for mosquito control. J. Econ. Entomol. 55:227–236.CrossRefGoogle Scholar
15. Oborn, E. T., Moran, W. T., Greene, K. T., and Bartley, T. R. 1954. Weed control investigations on some important aquatic plants which impede flow on western irrigation waters. Laboratory Report SI-2. Joint Report U.S.D.A. and U.S.D.I., Bur. of Reclamation, Denver, Colo. Pp. 28–29.Google Scholar
16. Thomaston, W. W., Wyatt, H. N., and Pierce, P. C. 1958. Preliminary results of chemical weed and algae control experiments in Georgia farm ponds. Preliminary Res. Rep., Fed. Aid to Fisheries Project F-6-R-5, Mimeo. 20 pp.Google Scholar
17. Watkins, T. C., Norton, L. B., Weidhaas, O. E., and Brann, J. L. Jr. 1955. Handbook of insecticide dust, diluents, and carriers. Pp. 200–214. Dorland Books, Caldwell, N. J. p.Google Scholar
18. Weidhaas, D. E. 1957. Laboratory study of the release of some organic phosphorus insecticides into water from granular formulations. Mosquito News 17:168–172.Google Scholar
19. Weidhaas, D. E., Bowman, M. C., and Schmidt, C. H. 1961. Loss of parathion and DDT to soil from aqueous dispersions and vermiculite granules. J. Econ. Entomol. 54:175–177.Google Scholar
20. Whitehead, F. E. 1951. Rice field mosquito control by pellet-borne insecticides. Arkansas Agr. Exp. Sta. Bull. 511.Google Scholar
21. Wilkinson, R. E. 1959. Effects of pelleted herbicides on aquatic weeds. SWC Abstracts 12:148.Google Scholar