Because of there great sense of smell and the fact they are very blind. traps should have long runners to guide them to the Earth worm bait they are smelling. These runners should be set in a V fashion to guide them right to the trap. Earth worms from a Fishing bait store can be placed in a Nylon stocking and the trap should be baited every night. In the morning remove the bait and place it in the refrigerator until that night should you not have a hit. Runners can be made from any thing but a 4 X 4 wood beam works well.

Malathion the last I checked, was still labelled for turf. It just plain stinks and that smell will drive armadillos away. Banning the outside perimeter of your property with a 10 ft wide treatment of Malathion will keep armadillos from crossing the Malathion perimeter.