Serpula lacrymans, The Dry Rot Fungus and Tolerance Towards Copper-Based Wood Preservatives

TY - GEN

T1 - Serpula lacrymans, The Dry Rot Fungus and Tolerance Towards Copper-Based Wood Preservatives

AU - Hastrup, Anne Christine Steenkjær

AU - Jensen, Bo

AU - Clausen, Carol

AU - Green III, Frederik

N1 - Conference code: 36

PY - 2005

Y1 - 2005

N2 - Serpula lacrymans (Wulfen : Fries) Schröter, the dry rot fungus, is considered the most(Wulfen : Fries) Schröterthe dry rot fungus, is considered the most economically important wood decay fungus in temperate regions of the world i.e. northernEurope, Japan and Australia. Previously copper based wood preservatives were the mostcommonly used preservatives for pressure treatment of wood for building constructions.Because of a suspicion about tolerance toward copper components, a soil block test wasundertaken to clarify the effect of two copper based preservatives, copper citrate and ACQ-D,on the dry rot fungus, Serpula lacrymans compared to an alternative non-copper containingwood preservative. The extensive use of copper-based wood preservatives has hastened theneed for understanding why some fungi are able to attack copper-treated wood. The coppertolerance of S. lacrymans and other brown-rot fungi is thought to be due in part to oxalic acidproduction and accumulation. Oxalic acid has been implicated in copper tolerance by theformation of copper oxalate crystals. Twelve isolates of the dry rot fungus, S. lacrymans andfour other brown rot species were evaluated for weight loss on wood treated with 1.2% coppercitrate, 0.5% ACQ-D and 0.5% N'N-naphthaloylhydroxylamine (NHA). Eleven out of 12 S. lacrymans were shown to be tolerant towards copper citrate. ACQ-D and NHA, on the otherwere shown to be tolerant towards copper citrate. ACQ-D and NHA, on the other hand, were both effective against the dry rot isolates. These wood preservatives are less toxictoward the environment than traditional copper based preservatives.

AB - Serpula lacrymans (Wulfen : Fries) Schröter, the dry rot fungus, is considered the most(Wulfen : Fries) Schröterthe dry rot fungus, is considered the most economically important wood decay fungus in temperate regions of the world i.e. northernEurope, Japan and Australia. Previously copper based wood preservatives were the mostcommonly used preservatives for pressure treatment of wood for building constructions.Because of a suspicion about tolerance toward copper components, a soil block test wasundertaken to clarify the effect of two copper based preservatives, copper citrate and ACQ-D,on the dry rot fungus, Serpula lacrymans compared to an alternative non-copper containingwood preservative. The extensive use of copper-based wood preservatives has hastened theneed for understanding why some fungi are able to attack copper-treated wood. The coppertolerance of S. lacrymans and other brown-rot fungi is thought to be due in part to oxalic acidproduction and accumulation. Oxalic acid has been implicated in copper tolerance by theformation of copper oxalate crystals. Twelve isolates of the dry rot fungus, S. lacrymans andfour other brown rot species were evaluated for weight loss on wood treated with 1.2% coppercitrate, 0.5% ACQ-D and 0.5% N'N-naphthaloylhydroxylamine (NHA). Eleven out of 12 S. lacrymans were shown to be tolerant towards copper citrate. ACQ-D and NHA, on the otherwere shown to be tolerant towards copper citrate. ACQ-D and NHA, on the other hand, were both effective against the dry rot isolates. These wood preservatives are less toxictoward the environment than traditional copper based preservatives.

M3 - Article in proceedings

VL - IRG/WP 05

SP - 1

EP - 7

BT - Ikke angivet

PB - U. S. Forest Service. Tree Search; Washington, D.C.

T2 - International Research Group on Wood Preservation

Y2 - 24 April 2005 through 28 April 2005

ER -