Gassers are working great so far. I estimate that the number of gopher/moles killed per gasser deployed is about 10%. Even though I would like a higher "kill rate", this product is more effective than any others that I have found. These make lots of foul smelling smoke.

Are gopher gassers effective?

Reclaim your lawn from destructive animal pests with the Amdro Gopher Gasser. This product kills gophers, moles, skunks, and other listed pests by releasing a toxic gas that travels through their burrow system. They can run, but they cannot hide.

How long do gopher gassers burn for?

Hold Amdro Gopher Gasser cartridge away from your body and ignite tip of fuse with a match or lighter with a small flame. The minimum fuse burn time is five seconds when it is lit at the tip.