After two years of laboratory and field testing, chlorpyrifos is showing excellent potential as an insecticidal treatment to wood. In laboratory termite tests, retentions as low as 1-2 parts-per-million or approximately 0.0008 kg/m³ (0.00005 lbs/ft³) are effective against the Coptotermes formosanus. Laboratory leaching tests have shown no significant effect on the concentration of the retained chlorpyrifos. Pressure treatments and dip treatments, as an aqueous emulsion or oil solution, have resulted in good penetration of effective concentrations. Combinations of chlorpyrifos and various fungicides are being evaluated.

Download document (394 kb)
free for the members of IRG. Available if purchased.

Purchase this document