I STARTED TO FEED FUMADIL B IN A SUGAR SYRUP SOLUTION LAST WEEK. I FILLED TWO DEEP HIVE BODY FEEDERS FULL OF THE MIXTURE (TWO HIVES)
I have used 20 years ago funmagillin and it helped. But it is given in one part that bees' intestine will sterilized from nosema.
ALSO I AM DOING A TERAMYCIN TREATMENT WITH POWDERED SUGAR AT THE SAME TIME.
It is no use to use terramycin before winter. The effect does not help long time. If you have american foulbrood it is better to put bees at sprin on new clean frames and strilize all another hive parts.
ALSO I AM FEDING A POLLEN SUBSTITUTE EXTERNALLY FROM THE HIVE IN THE TREE BUCKET SET-UP SEEN ON THIS SITE.
Pollen substitute helps at spring before nature gives pollen. Bees prepare now themselves to winter and there is no idea try to get them rise brood.
externally? - protein patty must be just beside brood area inside the hive. But wait for spring. Put patty just on the frame sticks.