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Some Effects of 2,4–Dichlorophenoxyacetic Acid upon Azotobacter as Measured by Respiration Inhibition

Published online by Cambridge University Press:  12 June 2017

Lyman A. Magee  and
Arthur R. Colmer
Lyman A. Magee
Affiliation:
Agricultural Experiment Station, Louisiana State University, Baton Rouge, La
Arthur R. Colmer
Affiliation:
Agricultural Experiment Station, Louisiana State University, Baton Rouge, La
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Extract

During recent years the increasing use of herbicides for the control of weeds in croplands has stimulated interest in the effect of these chemicals upon the soil microflora. In 1953 Hoover and Colmer (4) showed that the application of 2,4–D to Sharkey sugarcane soil in concentrations comparable to that used in the field had little effect upon the bacteria, actinomycetes, and fungi of this soil. Colmer (1), using the Winogradsky soil plaque technique which can serve to gauge the effect of herbicides upon the nitrogen-fixing genus Azotobacter in their natural habitat, found that field application rates were not harmful to A. chroococcum, and it was only when prohibitive rates of application of 2,4–D (400–600 ppm) were used that growth was markedly affected.

Type
Research Article
Information
Weeds , Volume 4 , Issue 2 , April 1956 , pp. 124 - 130
Copyright
Copyright © 1956 Weed Science Society of America 

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References

Literature Cited

1. Colmer, , Arthur, R. The action of 2,4–D upon Azotobacter of some sugarcane soils. Appl. Microbiol., 1:184–187. 1953.Google Scholar
2. Ely, J. O. The evaluation of germicides by the manometric method. J. Bact., 38:391–400. 1939.Google Scholar
3. Fred, Edwin B., and Waksman, Selman A. Laboratory manual of general microbiology, 1st ed. McGraw-Hill Book Co., Inc., New York. 1928.Google Scholar
4. Hoover, Minton E., and Colmer, Arthur R. The action of some herbicides on the microflora of a sugarcane soil. Proc. La. Acad. Sci., 16:21–27. 1953.Google Scholar
5. Magee, Lyman A., and Colmer, Arthur R. The effect of herbicides on soil microorganisms. III. The effect of some herbicides on the respiration of Azotobacter . Appl. Microbiol., 3:288–292. 1955.Google Scholar