Start Date: May 01, 2008
End Date: Apr 30, 2013
Volatile organic compounds (VOC) that indicate the presence of insect pest infestations, insect plant damage, and pesticide applications will be identified from available literature and through gas chromatography (GC) analysis performed in cooperation with scientists within our Unit. An instrument will be developed for collecting, monitoring, and recording gas emissions from the presence of quantity of these organic compounds. The first step is to develop a method to collect the gas emissions in a confined space. Next, a means of recording the gas measurement data automatically will be developed. Instrument development involves assembly of the sensor chamber and connections between the chamber and data collection system. Gas sensors will be mounted in the ceiling of the chamber and linked to a circuit board placed on top of the chamber, which will be connected to the power source. A data acquisition module will be used to convert the output from the gas sensors to digital output for recording and analysis. The data will be processed using principal component analysis, discriminate analysis, and other analyses based on statistical pattern recognition and artificial neural networks. The system hardware, software, and platform will be tested using the compounds of interest at differing levels of concentration to ensure proper system functionality. The working system will then be tested under laboratory and field conditions for its ability to detect varying concentrations of VOC from infested plants and pesticide applications.