Question: what essential oils kill bed bugs?
Answer: Carvacrol, derived from oregano and thyme; thymol (thyme); citronellic acid (lemongrass); and eugenol (clove) were most effective. When tested as fumigants, thymol, carvacrol, linalool (common in basil) and camphor (camphor tree) were most effective. Four of the compounds did not kill bed bugs over a 24-hour period.