A study conducted by the Journal of Zhejiang University Science evaluated the acaricidal (mite-killing) activities of 14 essential oils and their main monoterpenoid components against the common household dust mite (Dermatophagoides pteronyssinus), which are prevalent allergens in homes. The mites were exposed to five concentrations of the oils for either 24 or 48 hours, and results showed that the oils had time-dependent acaricidal effects, with their lethal concentrations (LC50) decreasing as exposure time increased. Among the essential oils, clove, camphor, rosemary, eucalyptus, and caraway showed the highest acaricidal activity, with clove oil being the most effective. Overall, the study suggests the potential use of these essential oils and their main monoterpenoid components as environmentally friendly and biodegradable substances for controlling household dust mites. Further research is needed to assess their practical applications in a domestic environment, considering factors such as their volatility, odor, and any possible adverse effects on fabrics. Clove oil, camphor oil, fennel oil, and the monoterpenoids cinnamaldehyde and chlorothymol were found to be particularly promising and should be the focus of further research.
