Add four cinnamon sticks to 70% rubbing alcohol and let sit for a day. Then spray the pumpkins with it and let dry. Don’t have cinnamon sticks? Mix three tablespoons of Dr. Bronner’s Peppermint Pure-Castile Soap and 3/4 cup isopropyl rubbing alcohol in a quart bottle, tehn add water to fill it up. Supposed to be a good, general purpose insecticide.