Laboratory and field evaluation of granite aggregate as a physical barrier against subterranean termites of the genus Coptotermes spp. (Isoptera: Rhinotermitidae)

Abstract

The commercialization of a physical termite barrier using basaltic screenings in Hawaii has led to a reappraisal of physical barriers for termite control elsewhere. We briefly outline physical barriers involving the use of sand and crushed stone currently in use around the world and then describe laboratory and field tests undertaken in Australia to evaluate granite aggregate as a potential physical barrier against subterranean termites, in particular, termites of the genus Coptotermes. A granite aggregate has been accredited as a termite physical barrier in Australia and marketed under the trade name 'Granitgard'.