Sixteen single chemicals and 6 formulations were tested for their efficacy in controlling molds and sapstaining fungi on wood mainly according to JWPA Standard-II.
When wood specimens were treated with each single chemical at 0.3% a.i. and exposed to Aspergillus niger and Gliocladium virens, organoiodine compounds (IF-1000, IPBC) were proved to be effective. Benzimidazoles (Thiabendazole. Mergal HS-100, -BCM) were satisfactorily effective against G. virens, whereas other chemicals were relatively less toxic to the test fungus. Chlorinated phenols were ineffective at 0.3%.
Among formulations tested in the present investigation, the followings could protect the treated timber from molds and sapstaining fungi: IF-1000+benzimidazole, TCMTB+MBT and TCMTB+IPBC. Nevertheless, stability tests of treating solutions and field trials are still needed before those candidates come to appear in the market.
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