Abstract
The behavior and audio spectra of Monochamus titillator F. larvae, the southern pine sawyer, were observed and measured in its natural environment. The sawyer is being utilized to assist in locating southern pine beetle infestations. The sawyer's audio emission is primarily in the 1000- to 2800-Hz range with intensity peaks at approximately 1300 and 2300 Hz. The analysis was obtained using both a sweep-frequency analyzer and an FFT spectrum analyzer. The oscilloscope display gave surprising information in that a single sound output seems to first intensify with time and then rapidly decay. A closer analysis reveals that a single sound is composed of several time decaying but ever intensifying components. The sound repetition rate varies from 30 to 120 pulses per minute depending on environmental conditions. The behavior of the sawyer during its sound production is being studied with regard to season of the year, time of day, ambient temperature, and sound production mechanism.
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