Timbers are susceptible to rapid deterioration by variety of organisms. The wood in living trees and also in used products would start to decay and decompose with the attack of organisms which is termed as the biodegradation of wood. The biodegradation is supposed to be one of the major challenges to incur the heavy economic loss. The fungi and insects are major causes of bio degradation. Wood products are subject to various bio-hazard attacks if preventative measures are not taken. The proper seasoning and / or preservative treatment can reduce the damages and increases the longevity of wood.