Nick Shilliff wrote: > Last fall the mites dropped into the tray in the bottom of the hives and > were not dead,after inserting Apistan as the lable directed.We observed > for 10 days and no change-NO dead mites.We then inserted coumophos strips > and the mite fall was large and they were all dead. Last year I also experienced apistan resistant mites, and used coumophos strips rather than apistan in the fall (for 45 days). This spring I had about a 7% mortality, which I consider acceptable, and when checking the surviving hives in April found that all had produced many drones and drone brood. During careful inspection of this drone brood between hive bodies in about all 80 hives I did not see even one varroa mite. (Late last summer every drone pupa had at least one mite on it.) Because the colonies all are very strong I decided not to do my usual spring treatment for varroa (which would have been apistan) but instead to begin supering. I know that coumophos is unpopular with many, but it cleaned out my varroa to a surprising degree. Ted Fischer Dexter, Michigan USA