Abstract
An automatic bio-monitoring system was developed for exploring the life history of insect (Callosobruchus maculates) inhabiting in beans. Callosobruchus maculatus only feeds before exclusion and the demand for food is different in every life stage. The feeding process cracks bean texture fibers and produces feeble ultrasound. Hence the life history of an inhabitant can be explored through spying the feeding cracks. The developed ultrasonic monitoring system consists of a delicate electronic signal-conditioning module, which amplifies, filters, and transforms a biting crack into a square pulse. A computer equipped with software developed in house acquires biting pulses and displays the life history on line. Acquired data are stored for subsequently off-line analysis. The system has been successfully applied to exploration of the life histories of Callosobruchus maculatus inhabiting in Azuki beans and mung beans.
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