Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Cedrus libani (Lebanon cedar) has a long-standing traditional use as an insect repellent. Historical records from the Middle East and Mediterranean regions mention the use of cedarwood oil derived from Cedrus libani in the preservation of manuscripts, textiles, and other valuable goods, largely due to its reputed ability to deter moths and other insect pests. Archeological findings suggest that ancient Egyptians used cedar oils in the embalming process, partially because of their insect-repelling properties. The wood itself was preferred for storage chests and coffins, again presumably to protect contents from insect degradation.

Scientifically, while there is evidence that oils from related cedar species exhibit insect-repelling activity, direct studies on Cedrus libani are limited. The available research suggests that the essential oil contains compounds such as cedrol and thujopsene, which have been shown to possess repellent effects in related species. However, rigorous, modern studies specifically on Cedrus libani's efficacy as an insect repellent are lacking. Thus, its use is supported more by traditional practices and indirect chemical evidence than by direct scientific validation.

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