Use of lahar from Mount Pinatubo as physical barrier to prevent tunneling and soil penetration of Philippine subterranean termites
2006
Ong, H.B.
Philippine subterranean termites viz., Coptotermes vastator Light, Nasutitermes luzonicus Oshima, Microcerotermes losbanosensis Oshima and Macrotermes gilvus Hagen were tested for their ability to penetrate lahar barrier consisting of uniform or mixed particles ranging in size from 0.71-2.36 mm in diameter. Laboratory bioassay showed that lahar particle in the range of 1.0-2.36 mm, 1.18-2.36 mm and 2.0-2.36 mmin diameter prevented penetration of C. vastator, N. luzonicus or M. losbanosensis and M. gilvus, respectively. Mixed sized particles with equal proportion of each effective size range were also effective in preventing penetration of the four species tested. Repelency test indicated that lahar was neither toxic or repellent to C. vastator, N. luzonicus, M. losbanosensis or M. gilvus.
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