I have been trying to document all those bee management activities I use. Unfortunately, I've forgot to mention a simple apicultural activity suggested by Marla Spivak that might serve to prevent some diseases developing in the bee hive. De. Spivak suggested "roughening up" the inside of hive boxes before using them to house bees. The "roughening up" encourages honeybees to "propolize" the walls of the hive box to a much greater degree. This simple management technique may lower the chances of some bee diseases gaining a foothold in the hive. Dr. Spivak has asked woodenware manufacturers to sell boxes in such a state.
"Roughening up" does not take much doing. Just take some steel wool and lightly scour the inside of the box.