European foulbrood (Terramycin® application)
In some cases, European foulbrood can be eliminated by requeening colonies
with a young queen. Requeening accomplishes two things: it gives the colony a more prolific queen and it provides
a time lag between brood cycles that allows the house bees to remove diseased larvae.
In advanced cases, the antibiotic Terramycin can be fed as treatment for the disease. Treatments are normally made
at least one month before the first major nectar flow, and again after the honey crop has been removed. However,
if the disease threatens the survival of the colony, Terramycin may be fed at anytime of the year. If treatment
is given just before or during a honey flow, extracting supers must be removed prior to treatment and any honey
produced during the season cannot be used for human consumption Because Terramycin is relatively unstable in honey
or syrup solutions, it should be fed as a dust mixed with powdered sugar.
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