I have a severe armadillo problem in my yard. I've tried trapping them successfully but there are so many around that once you catch and dispose of one, another one or more step in the next night. Only solution is to cut off their food supply (so they will go to my neighbors yard's). As grubs are the meal of choice, this product seems to be very effective. It does take a little time to take effect (2 weeks?) but then seems to last several months.