8-Frame bottom boards act as the base of the hive and serve as a platform for which the other components of the hive rest on. Bottom boards also act to protect the hive from larger predators such as mice and opossums. Screen bottom boards have gained in popularity recently as they provide more ventilation. Screened bottom boards have also proved effective in keeping down Varroa mite numbers by allowing the mites to fall through the screen and out of the hives.
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