Fecha de publicación: 19/11/1998 Fuente: WIPO "beekeeper" A gel formulation comprising formic acid and an acid-stable gelling agent, wherein the formulation provides controlled release of the formic acid; and a method for preventing or controlling mite infestation of honey bee colonies which comprisespreparing a gel formulation comprising formic acid and an acid-stable gelling agent, wherein the formulation provides controlled release of the formic acid, and placing the formulation in a beehive are disclosed.