Hmm. Last year EFB was treated with OTC, and in some of the colonies it
re-bloomed.
I spot treated this year, but I noticed it was extremely contagious and
infecting all nearby colonies in another apiary.
I found that once I treated with the 3X OTC 200mg doses, the colony never
has a re-bloom, but colonies only treated once they get a re-bloom.
I'm hesitant to do prophylactic treatments, but if I accidentally miss an
outbreak it spreads to all adjacent colonies within a week.
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