Abstract: An aggregation base for use within a subterranean cavity for detecting subterranean termites includes an elongate member having longitudinally opposite ends, a circumference, and an outer surface. A void extends longitudinally within the elongate member for forming an aggregation site for the termite. The elongate member is open at least at one end in communication with the void. At least one channel extends circumferentially about at least a portion of the circumference of the elongate member at the outer surface thereof and also extends transversely through the elongate member from the outer surface inward to the void.