Effects of population density on tunneling by Formosan subterranean termite (Isoptera: Rhinotermitidae) through treated soil
1990
Jones, S.C.
In laboratory tests, tunneling behavior of the Formosan subterranean termite, Coptotermes formosanus Shiraki, through soil treated with chlordane, chlorpyrifos, or methrin was significantly affected by population density. When exposed to each of these three termiticides at population densities of 0.03 or 0.003 g of termites per milliliter container volume, termites constructed a greater number of tunnels of greater length at the high population density. At a high population density, C. formosanus may be able to bridge a termiticidal barrier. A comparison among the three termiticides at low population density indicated that termites constructed significantly fewer tunnels in soil treated with permethrin; tunnel height and cumulative tunneling distance were slight, but comparable for chlorpyrifos and permethrin. The cumulative tunneling distance and maximum tunnel height were significantly greater for chlordane than the other two chemicals at low and high population densities.
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