The herbicides glyphosate, bromacil, and dalapon were assessed for their affect on the oxygen uptake of microorganisms from an aerated dairy lagoon at 20 °C. The maximum recommended addition of herbicide active ingerdient to a lagoon is: glyphosate (isopropyl amino salt)—0.42 mg/L; bromacil—3.70 mg/L; and dalapon (85.8 percent Na salt and 14.2 percent Mg salt)—1.95 mg/L. In addition, microorganism isolates from the aerobic dairy lagoon were incubated under aerobic and anerobic conditions at room temperature to assess the effects of the herbicides. Under aerobic incubation, it was found that neither herbicide type nor herbicide concentration affected isolate growth. Under anaerobic incubation, both inhibition and stimulation effects were found with gram-positive rod organisms being least affected.

Document Type


Publication Date


Notes/Citation Information

Published in Transactions of the ASAE, v. 25, issue 4, p. 1026-1028.

© 1982 American Society of Agricultural Engineers

The copyright holder has granted the permission for posting the article here.

Digital Object Identifier (DOI)


Related Content

This paper is published with the approval of the Director of the Kentucky Experiment Station and designated Paper No. 81-2-57.