Abstract: A termite control system utilizing an underground tube associated with underground or ground contacting foundation components of a building with the tube having discharge openings by which an insecticide may be discharged into ground areas adjacent the foundation of a building or the like for control of subterranean termites. In one embodiment, the tube system is associated with a posted or pier construction supporting a wood or composite floor. In a second other embodiment, the tube system encircles a pole-type foundation or support. In a third embodiment of the invention, the tube system is associated with a retaining bearing wall which has backfill dirt associated therewith. In each embodiment, the tubes are provided with radial slits to discharge insecticide therefrom with at least one end of the tube or tubes extending to a position accessible from a point above ground level to enable insecticide to be pumped into the tubes under predetermined pressure.