2002 AFB American foulbrood Apis Apis dorsata Apis florea apis mellifera Apis mellifera swarm catching Ascosphaera Ascosphaera apis aster bee Beijing cerana chalkbrood China dorsata foraging Galleria mellonella greater wax moth hyacinth March mellifera Minnesota mint mites. ovary Paenibacillus larvae scutellata St. Paul swarm catching. swarm hiving. Varroa destructor wax moth worker