Rosemary oil was found to create up to a 100% roach mortality rate at a concentration range of 2.5% to 30%. So mix it with water and spray away at your problem areas! However, other oils can help.

Raid Ant & Roach Aerosol Bug Spray kills a wide variety of insects including Cockroaches, Waterbugs, Palmetto bugs, Ants, Silverfish, Carpet Beetles, Crickets, Earwigs, Household Spiders ...