Thermacell Yard Tick Control Tubes - 12 CountDeveloped at Harvard University School of Public Health, Thermacell Tick Control Tubes are the no spray, no mess, easy way to kill deer ticks and help prevent them from spreading Lyme disease to pets and family. The 12 count box treats about acre of property per application. Tick tubes work with nature to reduce the tick population. Mice are the primary source of Lyme causing ticks, so tick tubes are designed to stop ticks on mice. Mice are drawn to