95% effective while leaving the least residue of available products.  Treat each colony by breaking 1 wafer into 4 pieces and placing around the brood nest.  Leave this for 7-10 days and replace with another wafer and after 7-10 replace for a third time.  This product is most effective when average daytime temperatures are between 65 and 95 degrees Farenheit.

Api-Life Var (thymol, menthol, eucalyptus) 2 wafer pack