Abstract: A method and system which exterminates mound building ants (Hymenoptera) such as imported red fire ants in situ their mound by changing a carbon dioxide gas concentration of an ambient atmosphere within the mound through a ground probe. This gas based method and system is novel due to its speed of extermination and due to the lack of toxic chemical residues left in the soil or environment. The method and system is suitable for use by homeowners or commercial enterprises and renders extermination of imported red fire ants economical and efficient. Treatment of one mound with the system taught in this patent disclosure is expected to cost as little as one fourth as much as use of currently prevailing methods.

Abstract: A method and system exterminates rodents in an at least partial enclosure by changing a carbon dioxide gas concentration of an ambient atmosphere in the at least partial enclosure. The gas based method is particularly effective in exterminating rodents in transport trailers, truck cargo holds, buildings, ship cargo holds, sewer lines, and tunnels or subways.