This is the most important development in beekeeping equipment today and if you are not using them you should be! The screened bottom increases brood production, reduces Varroa mite counts, enables you to better monitor your Varroa infestation levels, and enables bees to over winter better! The Corex sheet is printed with a numbered and lettered grid to ease the job of counting mites. Close them up with the enclosed Corrugated (Corex) Sheet when re-queening or starting a nuc or package. The rest of the year leave them open!
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