These carpenter bee traps require no bait or chemicals. Hang under the eaves or peaks of your house,barns & sheds. For best results plug ,caulk as many holes as possible. Do not paint or stain the box leave it as raw wood. Carpenter bees will enter the pre drilled hole on the box thinking its their home ,once inside the box they see light at the bottom of bottle thinking that's the way out. Once inside the bottle their trapped & soon die. They can't get back thru the funnel.