Toxicity of B, B’-Oxydipropionitrile Soluble and Insoluble Fractions of Creosote and Petroleum Oils to Wood-Destroying Fungi By the Soil-Block Method

The selective solvent (B,B’-oxydipropionitrile) can be used to separate petroleum and coal tar oils boiling in the creosote range into two fractions, one of which is much more toxic to the wood-destroying fungi Lentinus lepideus than the other. The soluble fraction is much more toxic than either the whole oil or the insoluble portion. Unweathered standard soil-test wood blocks are used to determine percent weight loss at five oil retention levels. Threshold values of the soluble fractions are nearly the same for oils of either coal tar or petroleum origin.

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