411 REFERENCE · Wikibooks
Beekeeping/Screened Bottom Board
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Developed to reduce the mite population of that hive. It is placed on the bottom of the hive box. Sticky paper can be placed underneath the box to observe the number of mites that fall through the screen. If a plain floor is used below the SBB, a gap of around 2" (5cm) will prevent any mites returning to the hive.