Hidden defects of the wood can significantly affect for its physical properties and the customs value. For the identification of the hidden defects of the wood currently uses any organoleptic and ultrasonic techniques, which are not always effective for detecting of early forms of fungal damage of the wood. The authors proposed a new method of detecting hidden defects of the wood through UV radiation. To implement the method proposed to use a spectral luminescent magnifier "Regula 4177" with the device PPI "Kedr-M". The study of 128 wood samples showed a rather high efficiency of the proposed method. Were identified features of the luminescence of several types of fungal infections in ultraviolet radiation. The proposed technique can be used to identify hidden defects in the wood at the industry and at the customs control.

Keywords: Hidden defects of wood; ultraviolet radiation, devices, methods of control, identification, customs control