But there is little information to substantiate their effectiveness. There are a number of difficulties in poisoning moles. Since moles normally do not consume grain, seeds or nuts, poison baits are seldom effective. One poison is federally registered for use against moles. The toxicant is zinc phosphide.
Fumigants are also federally registered for use against moles.
They are aluminum phosphide, calcium cyanide and gas cartridges. Most of these are restricted-use pesticides. These fumigants are much more effective if the material is placed in the deep mole burrows, not the surface runways. Since state pesticide registrations vary, check with your University Extension center for information on toxicants and repellents legal in your area. Care should be taken when using chemicals and the label instructions should be read, understood and followed.