辣椒茶黄螨光谱识别的初步研究

Preliminary Study on Spectral Discrimination of Polyphagotarsonemus latus on Pepper

为了对辣椒茶黄螨高光谱监测提供参考,对辣椒健康植株及受茶黄螨危害的植株进行了单叶光谱测量,并对光谱进行微分分析。结果表明:叶片光谱反射率随虫害程度的加重,在可见光波段呈现上升趋势,但上升幅度较小;不同虫害程度下的红边区域光谱反射率基本相同;近红外波段的叶片光谱反射率随虫害程度的加重而呈下降趋势。经光谱微分分析,随着茶黄螨危害程度的加重,"单峰"位置逐渐降低,红边位置发生"蓝移",表现出辣椒茶黄螨危害的特有特征。

Single leaf spectrums of pepper plants damaged by Polyphagotarsonemus latus were measured and studied by differential analysis to provide reference for hyperspectral monitoring of Polyphagotarsonemus latus on pepper.The results showed that the leaf spectral reflectivity slightly increased with the increase of damage degree in visible bands of light and declined with the increase of damage degree in infrared bands of light;The spectral reflectivity was basically the same under different damage degree.Differential analysis showed that the peak value gradually declined and blue shift occurred at the red edge with the increase of damage degree,showing peculiar characteristics of pepper plants damaged by Polyphagotarsonemus latus.