Fecha de publicación: 23/11/2004 Fuente: WIPO "beekeeper" A method and apparatus for the controlled delivery of volatile compounds is shown for the use in the treatment of honeybee colonies for different honeybee diseases. The method delivers the volatile compounds through the use of microporous membranes. The membranes can be in the form of microporous hollow fiber membranes or microporous flat sheet membranes. The membranes allow for the controlled release of the volatile compounds by the adjustment of the exposed surface area. This allows for delivery of the effective amount of compound during different seasons of the year. In the case of hazardous compounds such as the delivery of formic acid for the treatment of honeybees for parasitic mites the exposure to the beekeeper is minimized and no handling of liquid formic acid is necessary.