People use to throw the apples under the house to keep roach's and other insects out and away from the house as they rot they put of a toxic fume that bugs dont like, other than that dont know of any useful purpose for the apples now as a kid we came up will all kinds of things to use them for from baseball to make believe hand grenades' to bowling balls and of course targets squirrels love to eat the apples also or should say they will peel the outer layer off and eat the core.