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Altitude Effects on Picloram Disappearance in Sunlight

Published online by Cambridge University Press:  12 June 2017

Thomas N. Johnsen Jr.  and
Richard D. Martin
Thomas N. Johnsen Jr.
Affiliation:
U.S. Dep. Agric., Agric. Res. Serv., 2000 East Allen Road, Tucson, AZ 85719
Richard D. Martin
Affiliation:
U.S. Dep. Agric., Agric. Res. Serv., 2000 East Allen Road, Tucson, AZ 85719
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Abstract

Losses of picloram (4-amino-3,5,6-trichloropicolinic acid) in water exposed to sunlight ranged from 50 to 80% after 1 days' exposure (14 h sunlight) and 95% or more after 4 days exposure (56 h of sunlight) at four locations in Southern Arizona. Samples exposed at the highest elevation (2800 m) consistently lost picloram more quickly than samples at the lower elevations. Dry, recrystallized picloram losses were 11, 47, and 67% after 1, 2, and 4 days of sunlight exposure, respectively. At the same times, picloram losses in water were 65, 89, and 99%, respectively. These results indicate that photodecomposition is an important factor for the use and residue longevity of picloram on high-altitude rangelands of the western United States.

Keywords

Ultravioletrangelandsresiduesphotodecomposition
Type
Research Article
Information
Weed Science , Volume 31 , Issue 3 , May 1983 , pp. 315 - 317
Copyright
Copyright © 1983 Weed Science Society of America 

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References

Literature Cited

1. Baur, J. R., Bovey, R. W., and McCall, H. G. 1973. Thermal and ultraviolet loss of herbicides. Arch. Environ. Contam. Toxicol. 1:289–302.CrossRefGoogle ScholarPubMed
2. Becker, C. F. and Boyd, J. S. 1957. Solar radiation availability on surfaces in the United States as affected by season, orientation, latitude, altitude, and cloudiness. J. Sol. Energy Sci. Eng. 1:13–21.CrossRefGoogle Scholar
3. Bovey, R. W., Ketchersid, M. L., and Merkle, M. G. 1970. Comparison of salt and ester formulations of picloram. Weed Sci. 18:447–451.CrossRefGoogle Scholar
4. Crosby, D. G. 1976. Nonbiological degradation of herbicides in the soil. Pages 65–97 in Audus, L. J., ed. 2nd ed., Vol. 2, Herbicides: Physiology, Biochemistry, Ecology. Academic Press, New York.Google Scholar
5. Crosby, D. G. 1976. Photodecomposition. Pages 836–890 in Kearney, P. C. and Kaufman, D. D., eds. 2nd ed., Vol. 2, Herbicides: Chemistry, Degradation, and Mode of Action. Marcel Dekker, New York.Google Scholar
6. Davis, E. A. and Ingebo, P. A. 1973. Picloram movement from a chaparral woodland. Water Resour. Res. 9:1304–1313.CrossRefGoogle Scholar
7. Draper, W. M. and Crosby, D. G. 1978. Pesticide photodecomposition in dilute hydrogen peroxide solution. Page 52 in Abstr. 175th Am. Chem. Soc. Natl. Meeting, Anaheim, CA.Google Scholar
8. Gear, J. R., Zerr, R., Michel, J., and Grover, R. 1973. Decomposition of picloram in aqueous solutions under ultraviolet and sunlight irradiation. Proc. Chem. Biochem. Herbicides 1:11–12.Google Scholar
9. Glass, B. L. 1975. Photosensitization and luminescence of picloram. J. Agric. Food Chem. 23:1109–1112.CrossRefGoogle ScholarPubMed
10. Hall, R. C., Giam, C. S., and Merkle, M. G. 1968. The photolytic degradation of picloram. Weed Res. 8:292–297.CrossRefGoogle Scholar
11. Hedlund, R. T. and Youngson, C. R. 1972. The rates of ***photodecomposition of picloram in aqueous systems. Adv. Chem. Ser. 111:159–172.CrossRefGoogle Scholar
12. Johnsen, T. N. Jr. 1980. Picloram in water and soil from a semiarid pinyon-juniper watershed. J. Environ. Qual. 9:601–605.CrossRefGoogle Scholar
13. Johnsen, T. N. Jr. and Warskow, W. L. 1980. Picloram dissipation in a small southwestern stream. Weed Sci. 28:612–615.CrossRefGoogle Scholar
14. Koller, L. R. 1965. Ultraviolet Radiation. 2nd ed. John Wiley & Sons, New York. 312.Google Scholar
15. Merkle, M. G., Bovey, R. W., and Davis, F. S. 1967. Factors affecting the persistence of picloram in soil. Agron. J. 59:413–415.CrossRefGoogle Scholar
16. Michel, J., Grover, R., and Gear, J. R. 1973. Kinetics of picloram photolysis in aqueous solutions. Proc. Chem. Biochem. Herbicides 1:12–13.Google Scholar
17. Mosier, A. R. and Guenzi, W. D. 1973. Picloram photolytic decomposition. J. Agric. Food Chem. 21:835–837.CrossRefGoogle ScholarPubMed