The use of copper to prevent damage by slugs is becoming increasingly popular among gardeners as it has been proved to be an effective deterrent that works and one that is less messy and more humaneattack by slugs the scourge of all growers that is fatal to young tender seedlings and plants choice hostas and favourite specimens can be controlled by using these handsome copper rings which slugs will not cross as it gives them an electronic reaction they will not attempt to pass over this