Determination of the residual gamma isomer of benzene hexachloride (gamma-BHC) by gas chromatography showed that the insecticide persisted longer in sterilized flooded soils than in nonsterilized flooded soils. A second addition of gamma-BHC to one of the nonsterilized soils. (55 days after the first application) disappepsilonared more rapidly than the first addition. These results strongly indicate biodegradation of gamma-BHC in flooded soils.
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Raghu et al. (1966) studied this question.
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