We are suffering from a brown dog tick infestation like we have never seen before. Permethrin 10% was recommended to control these little devils. I used it at the rate of 7 oz per gallon of water and could see NO results. I tried an experiment by setting up one container with fabric in the bottom that was wet with the insecticide. I set up a second container with fabric that we heavily dosed with the Permethrin and then allowed to dry. Ticks dropped into the container with the wet fabric died within 24 hours. Ticks dropped into the container with the fabric that had been allowed to dry out never died. There does not appear to be any "28-day residual effect" with this product as claimed in "Product Description". I do not recommend this product for control of ticks.