| 光谱学与光谱分析 |
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| Fluorescence Spectrum Monitor for Early Warning of Greenhouse Cucumber Aphis Pests |
| SUI Yuan-yuan, YU Hai-ye*, ZHANG Lei, LUO Han, REN Shun, ZHAO Guo-gang |
| Key Laboratory of Bionic Engineering, Ministry of Education, School of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China |
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Abstract The infection and degree of cucumber aphis pests was studied by analyzing chlorophyllfluorescence spectrum in greenhouse. Based on the configuration of the spectrum, characteristic points were established, in which the intensity of waveband F632 was the first characteristic point between healthy and aphis pests leaves. The second characteristic point was K which was the change rate of spectral curve from waveband F512 to F632. The early warning could be executed on plants depending on these two points. The models of the infection and degrees of aphis pests were established for different wavebands by the least square support vector machine classification method (LSSVMR) radial basis function(RBF). The accuracy rate of classification and prediction of the models was compared by different peaks and valleys value in wavebands. The results indicated that the prediction accuracy of the model established by waveband F632 was the most perfect (96.34%).
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Received: 2012-01-04
Accepted: 2012-03-20
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Corresponding Authors:
YU Hai-ye
E-mail: haiye@jlu.edu.cn
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