Thermacell Tick Control Tubes are the no-spray, easy way to kill deer ticks and prevent them from spreading Lyme disease and Powassan virus to your pets and family members. Yard set-up takes only a few minutes twice a year.Kills backyard ticks with lyme disease,Doesnt harm kids, pets or environment,Apply in minutes, only two times per year,Works with nature to reduce the tick population,No spray; environmentally friendly,The best time to apply is in late-April and late-July before young ticks begin feeding