Thermacell Tick Control Tubes, 12-Count is 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. The best time to apply Tick Tubes is in late-April and late-July before nymphal and larval ticks begin feeding. If you miss these ideal times, it is still highly beneficial to apply Tick Tubes from May through September. Placing these tubes in strategic locations in your yard will reduce the ticks on your property and won't harm your pets, family members, or the environment. Thermacell Tick Control Tubes goes where sprays and granules can't reach underground to kill ticks in your yard. Thermacell products are safe, effective and come with a 100% Satisfaction Guarantee.