Tolerance of the nitrogen-fixing system ofAzotobacter vinelandii for four commonly used pesticides |
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| Authors: | K. A. Mackenzie I. C. MacRae |
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| Affiliation: | (1) Department of Microbiology, University of Queensland, Brisbane, Australia;(2) Present address: Egg Marketing Board, Brisbane, Queensland, Australia |
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| Abstract: | The effects of two insecticides, DDT and lindane, and two herbicides, Dalapon-Na and 2, 4, 5-T, upon the growth and nitrogen-fixing capacity ofAzotobacter vinelandii in pure culture were investigated using concentrations of the pesticides equivalent to the usual field application rates, and fifty times these levels. The acetylene reduction technique was used to assay nitrogen fixation. No significant effects of the pesticides at either concentration were detected upon growth or acetylene reduction. This study was supported by a grant from the Rural Credits Development Fund of the Reserve Bank of Australia. |
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