Cedar-lined storage chests and closets have long been used for long-term storage of out-of-season clothing, in the belief that the cedar will deter moths from destroying the clothing. But does it really work? The damage moths cause to natural fibers is caused not by the moth itself, but by the larvae that hatch out of the eggs the moth lays. Therefore preventing the damage can take two forms, preventing the moth from laying the eggs in the clothing, and killing the larvae as they emerge (or in the egg).
A report from the University of California at Davis suggests that one type of cedar, Eastern Red Cedar (which is actually a juniper), does kill moth larvae over a period of time. The wood contains an aromatic oil that in sufficient concentration, as in an airtight cabinet, will kill small moth larvae. If there is too much air circulation, as in a closet, concentration of the vapors will remain insufficient to kill larvae, although the scent might deter adult moths.
sourced from wisegeek.com
Dr. Khosrow Sobhe (Dr. Kay)
Certified Rug Specialist (CRS)