Has anyone tried mixing their own permethrin spray from the bottles of concentrate sold at farm supply stores? I just finished off my bottle of Sawyers, and need some. I compared the listed ingredients in Sawyers with what we spray our in our barn. They appear to be the same. Sawyers is a 0.5% solution, the concentrate is a 10% solution. Calculate the proper dilution rate, and you're set. It's hard to beat permethrin for ticks, chiggers, etc. Just spray it on your clothes, let it dry, and go hunting. It's supposed to last thru 6 washes before reapplying. I usually go with 3 or 4.