In a trunk or closet, use 1 pound of the crystals, flakes, or balls for each 100 cubic feet of space. Because the vapors are heavier than air, the chemicals should be placed in a shallow container on a shelf, or suspended from a clothes rod or hook in a thin cloth bag or perforated container. You can also protect woolen articles by wrapping them in paper or sealing them in a cardboard box. Before wrapping or sealing, be sure the articles are not infested. In making a paper bundle, carefully fold back and seal all edges of the paper with paper tape.
Cedar chests are good pestproof containers primarily because of their tight construction.
Before placing woolen articles in a cedar chest, see that they are free of larvae. Scatter moth crystals, flakes, or balls in cedar chests after they are several years old. Follow label directions carefully. Edited in January 1997, based on material developed in 1985. Lawrence K. Forcier, Director, University of Vermont Extension, Burlington, Vermont.