BEST MANAGEMENT PRACTICES FOR MAINTAINING EUROPEAN HONEY BEE COLONIES
excerpts:

Recommend re-queening with European stock every six months using marked or
clipped queens or produce a bill of sale from a EHB Queen Producer.

Immediately re-queen with a European Queen if previously installed clipped
or marked queen is found missing.

More docs from the Florida Bureau of Plant & Apiary Inspection can be found at:

http://www.doacs.state.fl.us/pi/plantinsp/apiary/apiary.html

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