A number of new fungicides and fungicidal mixtures made from twenty two chemicals were tested to determine their efficacies in control of sapstain fungi and molds on lumbers.
The tested chemicals and mixtures were the six types of new products and the twenty types of commercially available fungicides and fungicidal mixtures. The test method used is similar to the stan-dardized Japan Wood Preserving Association (JWPA) test.
It was confirmed that the several low-toxcity chemicals and mixtures were able to replace sodium trichlorophenate based agents due to their high efficacies as anti-sapstain and anti-mold agents.
The chemicals and mixtures D values (degree of damage) of which are less than thirty are considered to show the good effectiveness in practical application.
Many chemicals and mixtures tested were acidic solutions, so that many problems such as the iron rust of treatment tank, the discoloration or stain on wood surfaces by chemical action of cation must be solved in a practical application.

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