Author
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CRAWFORD, JENNIFER - UNIV OF ILLINOIS |
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SIMS, GERALD |
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MOORE, PAUL - SANDOZ AGRO INC |
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SCHMIDT, JAMES - SANDOZ AGRO INC |
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Submitted to: North Central Weed Science Society US Proceedings
Publication Type: Abstract Only Publication Acceptance Date: 12/5/1995 Publication Date: N/A Citation: N/A Interpretive Summary: Technical Abstract: A method is described herein which is used to determine the anaerobic biodegradation potential of atrazine in a flooded agricultural soil. Anaerobic biometers were prepared with soil and aqueous medium which contained radiolabeled atrazine and terminal electron acceptors. Volatile, aqueous, extractable, and unextractable 14C-residues were detected using liquid scintillation counting, high performance liquid radiochromatography, and soil combustion. Redox potential, pH, and sulfide accumulation were also monitored. Atrazine mineralization occurred under denitrifying and sulfate-reducing conditions. This method is easily adaptable to satisfy criteria required for anaerobic soil and aquatic metabolism studies which are presently required in pesticide registration. An advantage is that this method provides a more accurate representation of the range of anaerobic conditions which exist in the environment, thus an increase in anaerobic microbial activity is probable relative to currently used protocols, Likewise, data obtained with this protocol are expected to be more reliable and informative concerning the anaerobic fates of herbicides. |
