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Characteristics of Fluoride-based Anti-stain Chemicals Made from Industrial By-product (II) -Fungicidal Effectiveness against Isolated Fungi Through Laboratory Evaluation and Field Evaluation-

Lee, Jong-Shin (College of Agriculture and Life Sciences, Chngnam National University)

Publication Information

Journal of the Korean Wood Science and Technology / v.32, no.2, 2004 , pp. 82-89 More about this Journal

Abstract

Two kinds of chemicals (RNF-3 and RNF-4) with high anti-mold effectiveness against stored fungi causing fungal discoloration was selected from among the six kinds of fluoride-based chemicals in the preceding study. In this study, the anti-mold test using 16 species fungi isolated from the softwood lumbers which were fungal discolored and field test in the sawmill was carried out to prove the feasibility for practical using of selected chemicals.For the isolated fungi, the RNF-3 consist of F and Cu showed high mycelial growth control in the PDA medium and fungicidal effectiveness in the japanese red pine (Pinus densiflora), korean pine (Pinus koraiensis) and radiata pine (Pinus radiata) when the concentration was 2% or more. However the RNF-4 consist of F only was not effective compared with RNF-3 because of mycelial growth in the PDA medium and wood treated with 2% or more chemical solution. The RNF-3 also showed a strong anti-mold effectiveness because there was no fungal discoloration for the radiata pine boards treated by 2% and 10 min. soaking in the field test. These results mean that RNF-3 can be used as domestic anti-stain chemicals for prevention of fungal discoloration of the softwood lumber

Keywords

Anti-stain chemicals; Fungal discoloration; Fungicidal effectiveness; Fluoride; Softwood;

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