... or Hedge Apples: I have been looking for these since we moved to CA to put in the closets against spiders and moths. I found a site that sells them thru a link on the thread "Speaking of Gophers". I bought 8 -- one for each closet and under the beds.
Why my obsession: I've never had a biting-spiders-in-the-closet problem anywhere we've ever lived.... except here in CA. I used to be able to buy an insect thingy for the closets from HD -- a J&J product, but CA must have outlawed it because I can't find it anywhere.
My daughter lived in Benicia for awhile. I put one of these thingys in each of her closets. An hour later the outside of her closets were lined with spiders escaping the inside of the closets. The site was unbelievable.