Name: Steve San Diego Commercial cut flower grower
My Grandfather (a "real" farmer, not like myself) used to run the exhaust from his tractor tailpipe into the gopher holes to gas them and he said it worked well. Now, I see there are several variations of this concept for sale online, most at ridicules prices.The simple (least expensive) ones use a small engine motor with a heat resistant hose that runs into the gopher tunnels. The most expensive variations (several thousand dollars) use larger motors and compress the exhaust to inject into the gopher tunnels. If I have the time and can find an old small engine around here that still runs, I will consider building a "simple" version. Although, I don't envision me having the time. Maybe, if I had a tractor, I would rig up a hose from the exhaust to stick in the gopher tunnel. What could possibly go wrong?