Variable Selection Based Cotton Bollworm Odor Spectroscopic Detection

文献类型： 外文期刊

第一作者： Lu, Chengxu

作者： Lu, Chengxu;Gai, Shasha;Luo, Min;Zhao, Bo

作者机构：

关键词： Cotton bollworm;Helicoverpa armigera;Near infrared spectroscopy;Odor detection;Variable selection

期刊名称：INFRARED TECHNOLOGY AND APPLICATIONS, AND ROBOT SENSING AND ADVANCED CONTROL

ISSN： 0277-786X

年卷期： 2016 年 10157 卷

页码：

收录情况： SCI

摘要： Aiming at rapid automatic pest detection based efficient and targeting pesticide application and shooting the trouble of reflectance spectral signal covered and attenuated by the solid plant, the possibility of near infrared spectroscopy (NIRS) detection on cotton bollworm odor is studied. Three cotton bollworm odor samples and 3 blank air gas samples were prepared. Different concentrations of cotton bollworm odor were prepared by mixing the above gas samples, resulting a calibration group of 62 samples and a validation group of 31 samples. Spectral collection system includes light source, optical fiber, sample chamber, spectrometer. Spectra were pretreated by baseline correction, modeled with partial least squares (PLS), and optimized by genetic algorithm (GA) and competitive adaptive reweighted sampling (CARS). Minor counts differences are found among spectra of different cotton bollworm odor concentrations. PLS model of all the variables was built presenting RMSEV of 14 and R-V(2) of 0.89, its theory basis is insect volatilizes specific odor, including pheromone and allelochemics, which are used for intra-specific and inter-specific communication and could be detected by NIR spectroscopy. 28 sensitive variables are selected by GA, presenting the model performance of RMSEV of 14 and R-V(2) of 0.90. Comparably, 8 sensitive variables are selected by CARS, presenting the model performance of RMSEV of 13 and R-V(2) of 0.92. CARS model employs only 1.5% variables presenting smaller error than that of all variable. Odor gas based NIR technique shows the potential for cotton bollworm detection.

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