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Q&A Home

Tim from Tucson, Az writes,

Need to control a few large american roaches finding their way into the home

I believe our problem started about 3 years ago when I discovered a hole in the lid of my septic tank. The tank had become infested with the large brown (i believe american) roaches. Occasionally we would find one in the house. This year my septic tank was pumped and repaired and I don't see anymore roaches in there. But I believe they may still be in the ground around the septic tank and still finding their way into our house. I can't find how they're getting in, but one thought would be to kill the outside colony. Is this possible? What products should I use? Whenever I spray my normal outside insectiside heavily in the area, it seems better for a little while, but not permanently. I do see several holes in the ground about quarter size that makes me think it could be their ground access.


How to Control American Roaches / Palmetto Bugs

American Roaches come from the outside of the home, so it is best to spray a liquid insecticide around the outside foundation of the home such as Talstar One or Cynoff WP, rather than using roach baits. Also focus on sealing up cracks around doors and in the foundation so roaches can't get in.

  1. Repair damage to screens, door frames, or exterior siding that may provide entry from outside.
  2. Repair any leaks or excess water floor near the structure and ventilate other moist spaces. American cockroaches are highly attracted to water.
  3. Remove rotting leaves, garbage cans, or compost piles as far from the structure as possible.
  4. Use a residual spray such as Talstar One or Cynoff WP outside around all points of possible entry including windows and door frames, dryer vents, and pipe openings. Use the same residual indoors along baseboards and framed entry points.
  5. For added protection, apply Talstar Granules outside around the base of the house as a perimeter treatment.

Answer last updated on: 04/13/2015

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