Base device for fighting against Varroa destructor in beehive, has web with oblong openings, where spaces of openings are delimited by frames, and cumulated length of openings is divided by number of spaces equal to interior length of hive
The device has a recess provided corresponding to an interior surface of a hive, where the recess is completely covered by a preformed web (116). The web is arranged with a set of oblong openings (127-132) whose width lies between 1 and 4mm. The openings are discontinuous, and spaces of the openings are delimited by two frames. A cumulated length of the openings is divided by the number of spaces that is equal to interior length of the hive. The openings are provided in the shape of a funnel.
