Larry I use Talstar. It's available from most feed and seed stores. It's granular, not a poison, stays where you put it, wont wash away and I spread it twice a year. It's good for six months. I do the whole yard and when i find a nest I put a little extra. A nest treated will not produce a smaller nest in a few days. Once and done. Check it out, you wont be sorry.
"gene"