OK, OK, we've been goofy about gophers long enough.
Vader, I searched the web, and found a couple of links for ya:
Critter RepellantMole & Gopher Repellent
And if you want
high-tech...
Maybe one of these will work for ya. That, or there's always conventional weapons, but that could take years, and cost millions of lives, and do a hell of a number on your rose bush.