You can buy drone foundation for this purpose. A frame of drone foundation discourages the bees from making drone cells elsewhere and you can pull the whole fra

You can buy drone foundation for this purpose. A frame of drone foundation discourages the bees from making drone cells elsewhere and you can pull the whole frame, pop it in the freezer overnight and then return it to the hive. The girls will remove the now dead brood and start again. This can also be part of your varroa strategy.