Here is part of the label instructions from my package of Fumagilin-B:

“Heavily infested colonies that will no longer take in syrup may be sprayed repeatedly, directly 
onto the bees, frame by frame with 1:1 sugar syrup (one part sugar to one part water) containing  
2 g of Fumagilin-B per litre of syrup.”

Regards,
Dick Allen

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