As the new feral colonies increase, it will become impossible to find them and to eradicate their varroa mites. That is why now is such a special opportunity to attack this pest. EPA further stated that the inert substances in Fed. 61, No. 45 can be added to the active ingredients listed in Fed. State registration does not imply safety of efficacy.
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Contact your state pesticide office for their requirements. Feed the bees as much syrup as they will take. We have had good results with wintergreen, spearmint, and peppermint oils. Stir well and pour into three 8 oz. The bees chew it up and remove it in a week or so.