Rubberwood Lumber Preservation by Dipping and Brushing Treatments with Copper Naphthenate and Boron Compounds for Protection Against Termites

Abstract

The aim of this research is to study on rubberwood lumber preservation by dipping and brushing treatments with copper naphthenate and boron compounds for protection against termites at Hat Wannakon Student Training Station, Prachuap Khiri Khan province. The experimental design was used with 1+2×2×4 factorials with the completely randomized treatment and 20 replicates. Control is rubberwood without treat. The first factor was boron compounds: dipping boron compound 10% treatment and not dipping. The second was preservative methods: dipping and brushing treatments. The third was copper naphthenate types: copper naphthenate with waterborne preservative 1%, copper naphthenate with waterborne preservative 2%, copper naphthenate with oil solvent 1% and copper naphthenate with oil solvent 2%. After treatments, the rubberwood samples were placed at the outdoor climate by graveyard testing method and evaluated damage area destroyed by termites on each samples during 3, 6 and 9 months.

The results revealed that the percentage of rubberwood damage area destroyed by termites from graveyard test in 3, 6 and 9 months. Boron compounds 10% and copper naphthenate 2% oil solvent preservative by dipping treatment had not any trace of destruction by termites. The most destroyed rubberwood was control condition which had damage areas of 4.15%, 21.45% and 42.70% on wood at three duration, respectively. The type of subterranean termites in this research was Microcerotermes crassus Snyder (Isoptera: Termitidae).