In my
experience, standard
chicken wire is not sufficient. I have had better luck with double dipped gopher wire. My current
yard is small, standard 1/10 acre suburban plot. So, for battling gophers, every morning I would look for mounds, if I found any I would boil a large pot of
water, add to it garlic, chile peppers, and black peppercorns. When it cooled sufficiently, I would add a couple tablespoons of castor oil and grey water safe dish
soap (I use Oasis). Whisk it together. Try to open up the hole and mound and pour it in. After a couple of weeks, no more mounds. I doubt this would be feasible on a large scale, but it worked for me.