Hi, On the use of Fumidil B for mosema control. Recommendations from the U fo MN are to use fumidil B in the first sugar syrup fed to packages in the spring - this is to protect the queen from nosema and really does reduce supersedure. In the fall and colony to be overwintered should be fed 2 US gal of 2:1 sugar syrup with fimidil B to prevent nosema problems the following late winter and spring. These recommendations are based on research conducted in MN by the late Dr Furgala. FWIW blane ****************************************** Blane White State Apiary Inspector Minnesota Department of Agriculture 90 W Plato Blvd St Paul, MN 55107 http://www.mda.state.mn.us phone 612-296-0591 fax 612-296-7386 [log in to unmask] ********************************************