Effectiveness of Selected Preservatives in Protecting Bamboo Against Termite Attack

Bamboo is highly susceptible to insect attacks. To promote its use as an alternative to wood, it is crucial to assess its preservation methods to increase its service life. This study investigated the effectiveness of preservatives in protecting bamboo against termite attack. Three bamboo species were extracted, air-dried, and pressure-treated with different concentrations of crude-lake salt, borax-boric acid, and tanalith. Preserved and unpreserved samples for each treatment were weighed and exposed to Macrotermes bellicosus termites in Kasagala Central Forest Reserve. After 21 days, durability classes and mass loss were determined following European standards. The results showed that termite resistance depends on the type of preservative. All the untreated and crude lake salt-treated bamboo samples were attacked and classified into the not-durable class. Samples treated with Tanalith were classified under the durable class. Borax-boric acid provided moderate resistance to bamboo samples and belonged to the moderately durable class. Crude lake salt did not provide sufficient protection against termites. The difference in species did not influence termite resistance. Untreated B. vulgaris had the highest mass loss and O. alpina the lowest. The findings from the study will contribute to improved utilisation of bamboo by proper preservation