Differential response of formosan subterranean termite castes (Isoptera: Rhinotermitidae) to selected termiticides

Document Type

Article

Publication Date

12-1-1996

Abstract

To examine and compare the responses of different castes of Coptotermes formosanus Shiraki to termiticides, contact bioassays were conducted with chlorpyrifos, deltamethrin, imidacloprid, and sulfluramid. Workers and soldiers were tested with all four chemicals. Alates were tested only with imidacloprid. The LC50s of chlorpyrifos, deltamethrin, imidacloprid, and sulfluramid were 11.42, 5.26, 2.86, and 236.09 ppm, respectively for workers, and 8.84, 8.13, 49.42, and 82546.70 ppm, respectively for soldiers. Chlorpyrifos was more efficacious against soldiers than workers, whereas for imidacloprid and sulfluramid, workers were more susceptible than soldiers. Alates were more tolerant than soldiers or workers to imidacloprid. Susceptibility to deltamethrin did not differ significantly between workers and soldiers.

Publication Source (Journal or Book title)

Sociobiology

First Page

23

Last Page

32

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