Gophers – The Black Box. Find it at Hanks hardware or Ace. It’s a black box with a small hole in one end. Bury it so the hole is exposed to light. The gopher will try and close the hole and will trip a spring trapping the varmint. Worked after trying flooding, road flares, guns, etc.
Roach and Silverfish – Roach Proof – Again at an ACE Hardware. It’s a fine powder much like the Boric Acid and sprinkled around will work. Give it a couple of weeks.