thanks smitty
The rule of thumb I always followed was my own tasting. I've always had free access to bushels and bushels of free apples. Many immigrants had fruit trees in their back yards. When the spray restrictions came about those immigrants couldn't get the pesticides without a licence. Most just let the trees go. When husbands died the widows ... again .. just let them go. Niagara has plenty of "wild" apples growing in the woods. If I find an apple tree you could always tell if it was a deer magnet real easy. If there were apples in the tree but none on the ground that told the story. I've had lots of guys tell me they found an apple tree and the ground under it was loaded. So they set up and were disappointed. Obviously not the deer magnet they thought it was. Not all apples are created equal!
getting back to corn .... when I use corn I only use a small amount on the nights I go in to hunt. The deer will clean it up by sunrise before the turkeys.