The performance of CCA treatment in bamboo against decay fungi
O Sulaiman, R J Murphy
Samples of culm wall material from young (< 6 month age) and mature (> 3 years age) culms of the bamboo, Phyllostachys virideglaucescens were treated to equivalent% w/w retentions of a CCA preservative. After fixation and leaching the treated samples were exposed to decay by Chaetomium globosum FPRL S70K, Coriolus versicolor FPRL 28A and Coniophora puteana FPRL 11E. Thin section samples of untreated and CCA treated bamboo were also exposed to Chaetomium globosum PPRL S70K for visual assessment of decay. The results indicated that CCA could control all three decay types in the mature culm but, in the young material, no dose response to the treatment was found at%w/w retentions equivalent to those in the mature culm. The results are discussed with respect to the development of bamboo cell walls and suggest a significant role for the presence of lignin in determining CCA effectiveness.