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Benomyl-Soil Microbial Interactions. M. R. Siegel, Professor, Department of Plant Pathology, University of Kentucky, Lexington, Ky. 40506; Phytopathology 65:219-220. DOI: 10.1094/Phyto-65-219.

Benomyl added to soil caused no changes in bacterial populations, but did reduce numbers of fungi and actinomycetes. Decomposition (16-34%) of 14C ring-labeled benomyl, during 6 and 12 months incubation periods, occurred only in nonsterilized soil. Ring cleavage of the benzimidazole nucleus and metabolism of this moiety to CO2 is apparently related to the presence of soil microorganisms.

Additional keywords: fungicide, soil microflora, metabolism.