Four formulations were tested for their efficacy in controlling molds and sapstaining fungi on wood according to the Standard-II of Japan Wood Preserving Association (JWPA). Relative efficacy was compared on the basis of visual rating of the fungal growth on the treated and untreated wood surfaces when the wood specimens were exposed to each monoculture of 5 test fungi at 26±2°C and 70-80% for 4 weeks. The results indicated that the formulations containing IF-1000 (p-chlorophenyl-3-iodopropargyl formal)+ TBZ[2-(4-thiazolyl)benzimidazole], TCMTB [2-(thiocyanomethylthio) benzothiazole]+MBT (methylene bis thiocyanate) and TCMTB + IPBC (3-iodo-2-propynyl butyl carbamate) were superior in anti-sapstaining effectiveness to commercial trichlorophenol-base products. However, the mixture of IF-1000+Mergal HS-100 [ 2-(methoxy-carbonyl-amino)benzimidazole-4-n-dodecyl-benzene sulfonic acid] was not satisfactorily effective against Gliocladium and Rhizopus.

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