IUFRO Division 5 Conference Chun-Ya LIN IUFRO Division 5 Conference 5.03.00 – Wood Protection

Chun-Ya LIN, Chi-Lin WU and Shang-Tzen CHANG Evaluating the Potency of Cinnamaldehyde as a Natural Wood Preservative National Taiwan University School of Forestry and Resource Conservation No. 1, Section 4, Roosevelt Rd. Taipei City Taiwan

? Objective Antifungi Antitermite Cinnamomum osmophloeum GC/MS ? New Environmental Benign Wood Preservative trans-Cinnamaldehyde (82%) (Chang and Cheng 2002; Cheng et al., 2006; Wang et al., 2005)

Results Fungi decay resistance Long-term effectiveness 5% Cinnamaldehyde-treated wood (CTW) 5% CTW placed at ambient conditions for 12 months WL: 1.2% WL: 4.6% WL: 1.4% Mortality: 83.3% Non-treated wood Brown-rot fungus Laetiporus sulphureus Fungi decay resistance WL: 31.6% WL: 0.8% White-rot fungus Lenzites betulina Long-term effectiveness WL: 18.7% WL: 1.2% Termite Coptotermes formosanus Shiraki WL: 0.3% Mortality: 100% WL: 7.3% Mortality: 10% Termite attack resistance

Conclusions Cinnamaldehyde exhibited excellent resistance against wood-rot fungi and termites Antifungal and antitermitic performance of cinnamaldehyde definitely last 12 months at least Cinnamaldehyde has great potential to be applied as a Natural Wood Preservative