Bacterial oak – research results and needs

Research findings on bacterial oak are reviewed. Research results indicate that bacterial oak is a form of wetwood in which associated bacteria cause damage and weakening of wood cell walls. The weakened wood tissue, in turn, causes internal wood damage such as shake, and leads to subsequent wood processing problems in drying, machining, gluing, and finishing. Bacterial oak is more prone to drying defects such as deep surface checking, honeycomb, ring separation and collapse. It also appears to be susceptible to machining defects such as loosened grain and shelling. Recent studies and surveys indicate an increase in the occurrence of bacterial oak and its related problems. Based on the results of recent findings, future research needs are assessed. Continued and increased short- and long-term research and development are recommended in order to gain a better understanding and control of bacterial oak and related problems.

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