I agree with Blane and the ARS.Sorry to say,we have them here in Central NY. 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. Nick Shilliff 200 hives-