What is the most effective bait for trapping feral hogs?

Research by Dr. Tyler Campbell with USDA-APHIS suggests that hogs are attracted to baits with a sweet pungent odor, such as strawberry or berry flavorings.  Based on this research, several commercial hog baits contain some type of strawberry flavoring.  Shelled corn, fermented grain, catfish “stink” baits, and overripe fruit and vegetables have also been used successfully.  Landowners are encouraged to vary baits among traps to determine what feral hogs find most attractive at a particular location or season.