Wisconsin's deer populations were almost hunted to extermination in the 1900s but have since rebounded and become a major problem for homeowners, according to the University of Wisconsin-Stevens Point. Deer like to feed on young tree seedlings and can quickly decimate a newly-planted row of trees. Protect your tree crop from deer using a variety of chemical and physical control strategies.
Hang bags of nylon stockings filled with a couple handfuls of human hair or single bars of soap on the outer branches of the tree seedlings. Space each bag or bar apart by approximately 3 feet, according to the University of Wisconsin Extension.
Spray the tree seedlings with a deer repellent product registered for use on your specific type of tree. Apply the sprays according to their labeled guidelines, since potency varies by product.
Keep a dog on a long leash near the seedlings to scare off herds of deer, according to the University of Wisconsin Extension. Employ the use of a gas exploders to make loud noises at regular intervals to frighten off deer.
Set up a high-tension, woven-wire fence around the seedlings that's 8 feet tall in the typical design used by Wisconsin's Wildlife Damage Abatement and Claims Program (WDACP).