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Degradation of Phenylcarbamates in Soil by Mixed Suspension of IPC-Adapted Microorganisms¹

ABSTRACT

A mixed suspension of microorganisms containing at least 7 tentatively identified genera was derived from a liquid mixture of soil and IPC. This suspension, when applied to nonsterile greenhouse soil flats, markedly reduced or eliminated the toxicity of the phenylcarbamates IPC, CIPC, and Swep to several test plant species. The suspension of microorganisms was effective in the soil for between 2 and 3 months. These findings have implications for the degradation of chemicals resistent to the native soil population.

Key Words: herbicide residues

¹ Supported in part by Grant no. 16060-DMP (formerly WP-00750), Water Quality Office, Environmental Protection Agency.

² Boyce Thompson Institute for Plant Research, Inc., Yonkers, N. Y. 10701.

Received for publication December 10, 1971.