There have been recent studies that suggest cockroaches have been and are becoming resistant to various types of pesticides. While this is a major issue it doesn’t really affect our method of getting them under control: boric acid. Boric acid is a naturally occurring compound that is white, odorless, tasteless and less toxic than table salt. While boric acid can act as a stomach poison when ingested by insects it also acts as a desiccant. When cockroaches walk through the powder it sticks to their bodies and can be ingested when they clean themselves. The powder on their body also scratches the waxy cuticle of their exoskeleton and causes them to dehydrate & die. Scientists don’t know for sure how the boric acid causes cockroaches to die when the ingest it but the fact that it works mechanically on their body insure that roaches will never become resistant to boric acid!