Boz from Mo writes
No, Cynoff Insecticide Dust can not be used in drains for any reason. Most times roaches are not coming from drains and you are only seeing them come out from there because they are going for the water/moisture in them, then coming back out. American Roaches come from the outside of structures(usually attracted to lights), so it is best to spray a liquid insecticide around the outside foundation such as Talstar One or Cyper WP. Also focus on sealing up cracks around doors and in the foundation so roaches can't get in. We also have a great article for them. How To Get Rid of Palmetto Bugs
Answer last updated on: 01/30/2015
