Use moth balls to prevent or eliminate a moth infestation. Moth balls have insecticides that vaporize at room temperature and kill larvae that hatch from the eggs left on garments by adult moths. Fumes from moth balls are harmful to humans and pets, so precautions must be followed. But with proper use, moth balls will control moths on stored items.
Read the label directions on the moth ball package. That label is actually a legal document containing guidelines for permissible use. Follow all label directions explicitly.
Use moth balls to protect natural fibers. Moth larvae prefer to eat animal fibers like wool. They do not eat synthetics so there is no need for moth balls when storing rayon, nylon or polyester garments.
Use moth balls to protect garments that will be stored for more than a month. Laundering eliminates moth problems for clothes and bedding that gets washed on a regular basis.
Use moth balls in airtight containers only. Place moth balls with textiles containing natural fibers inside garment bags, storage containers or trunks and seal them closed. If you detect moth ball odor outside the container, it is not airtight.
Select appropriate sizes and amounts of moth balls for items and containers. Use one 1/4-inch moth ball for a single shirt stored in a gallon-size zip bag. Place two or three 1/2-inch diameter moth balls in a large storage bag with several garments, and up to four 1-inch moth balls inside a large trunk.