Abstract: A plastic cuff which has been sectioned and cut to fit a mooring line for a marine vessel and similarly shaped structures. The cuff may be tubular or cylindrical and provided with a spiral cut. It is treated with an insecticidal agent or made of an insecticidal material. If cylindrical, it is made with sufficient elasticity to maintain its shape, so that the cylindrical cuff may be wrapped around a rope or other extended cylindrical shape by means of opening the cuff along the spiral cut which travels the length of the cuff. It then clings to the rope due to the inherent tension of elastically attempting to resume its original shape. Alternatively, the cuff may be attached or retained by way of clasps on either end or by pins.