Little Worm things

I would spray around the outside of the house. In the past we have gotten these little centipede things that were about an inch long and the neighbor said that seven dust worked great, it did. We try to spray around the outside of the house about 1 a month now for ants or spiders or just whatever. We haven't gotten anything inside since. We use a spray so when it dries it shouldn't bother the dogs, it hasn't so far, and we just spray about a 4-6 inch strip around the entire foundation of the house.