I want to clarify a comment made earlier that Terramycin in extender
patties is inadvisable. This is, in fact, an approved use in the U.S.
for two Terramycin products, TM-50D and TM-100D. Unfortunately, the
label has not been updated for the Terramycin product most widely used
by hobbyists, TM-25. A Pfizer Corp. representative and I wrote a summary
article of these uses in the April 1994 American Bee Journal. Like with
syrup or dust applications, a beekeeper using medicated extender patties
must observe a 4-week withdrawal before nectar flows.
 
Keith S. Delaplane
Dept. Entomology, 200 Barrow Hall
University of Georgia
Athens, GA 30602  USA
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