Quote:
Originally Posted by Ice
The flaw in this method is that you have to have every other escape hole plugged as well. I did this (even though its illegal in California) and thought it would work, but I think because I was never able to find any other holes, the carbon monoxide was escaping before it was potent enough to kill the gopher. It did keep the gopher away from my yard for a couple of days thought, so there is probably something to the residue theory.
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I was able to see the exhaust coming out of the open holes when I did it, but I can see how that would be a problem