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
 
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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
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