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Effects of 60Co Radiation on Herbicides in Aqueous Solution

Published online by Cambridge University Press:  12 June 2017

D.L. Bucholtz  and
T.L. Lavy
D.L. Bucholtz
Affiliation:
Univ. Nebraska, Loncoln, NB 68583
T.L. Lavy
Affiliation:
Univ. Nebraska, Loncoln, NB 68583
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Abstract

Phytotoxicity of herbicides in water was measured before and after exposure to gamma radiation from a 60Co irradiator. Chromatographic methods and bioassays were used to measure alterations that occurred during 60Co exposure. Phytotoxicity of picloram (4-amino-3,5,6-trichloropicolinic acid and trifluralin (α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine) solutions was reduced even with the lowest dose of 60Co, 1.7-megarad (Mrad). Alterations in phytotoxicity of atrazine (2-chloro-4-ethylamino-6-esopropylamino-s-triazine) and dicamba (3,6-dichloro-o-anisic acid) solution occurred only at 5 Mrad, which was the highest dose used. The phytotoxicity of atrazine solutons increased with the 5-Mrad irradiation. Thin layer chromatography (TLC) data showed that all herbicides were altered by 60Co irradiation. Several products resulted when trifluralin was irradiated.

Type
Research Article
Information
Weed Science , Volume 25 , Issue 3 , May 1977 , pp. 200 - 202
Copyright
Copyright © 1977 by the Weed Science Society of America 

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References

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