Calendar of Management Practices>March>Terramycin
Mix Terramycin powder with powdered confectioners sugar. Dust 1/3 cup (1 0z.) of the mixture over the top of the outside frames in the brood chamber. Apply this mixture three times at 4 to 5 day intervals in February/March.
For TM25: TM25 is sold in 6.4 oz. packets, each containing 10,000 mg oxytetracycline. 800 mg oxytet. is applied per honey bee colony. To produce dust containing 267 mg oxytet./oz., combine entire packet with 2 lbs. powdered sugar to produce enough dust to treat 12 colonies (3 dustings of 1 oz. each).
For TM50: TM50 contains oxytetracycline at 50 g/lb. (=3125 mg/oz.). To prepare the TM50+powdered sugar dust (267 mg oxytet./oz.) add 3 oz. of TM50 to 2 lbs. powdered sugar to produce enough dust to treat 11 colonies (3 dustings of 1 oz. each).
Terramycin Extender Patties
Colonies can be treated to prevent foulbrood diseases with one treatment in March and another in October. Due to increasing incidence of foulbrrod resistance to terramycin we caution the routine use of this material as a preventative when there has not been any recent incidence of foulbrood in the local area.
First mix the terramycin (TM25) or terramycin (TM50) and powdered sugar thoroughly with granulated sugar. Then add vegetable shortening , mix and flatten over wax paper into 1/4 patties. These can be frozen in plastic bags for later use.
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