An apparatus and method for treating infestation in a wooden body is provided. The apparatus comprises at least one transducer configured to deliver High Intensity Focused Ultrasound (HIFU) signals to at least one region of the wooden body. The method comprises scanning at least one part of the wooden body to identify at least one region of the wooden body infested with one or more pests. The method further comprises delivering HIFU signals to the at least one region of the wooden body infested with the one or more pests.