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Characterization of brown planthopper damage on rice crops through hyperspectral remote sensing under field conditions

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Title Characterization of brown planthopper damage on rice crops through hyperspectral remote sensing under field conditions
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Creator N. R. Prasannakumar & Subhash Chander & R. N. Sahoo
 
Subject Nilaparvata lugens (Stål.) . Spectral reflectances . Wavebands
 
Description Not Available
Field experiments were conducted to characterize the brown planthopper (BPH) (Nilaparvata lugens (Stål.)) damage stress on rice crops through hyperspectral remote sensing. The BPH-damaged rice crop had higher reflectance in visible (VIS) and lower
reflectance in near-infrared regions (NIR) of the electromagnetic spectrum compared with uninfested plants.
Mean reflectance of the rice crop varied among different BPH damage levels in various wavebands, with the greatest variation in NIR (740–925 nm). Correlations
between plant reflectance and BPH damage depicted four sensitive wavelengths, at 764, 961, 1201 and1664 nm in relation to BPH stress on the rice crop.
Three new brown planthopper spectral indices (BPHI) were formulated by combining two or more of these sensitive wavelengths. Some of the hyperspectral indices reported in the literature were also tested for their suitability to detect BPH stress on rice crops. Based on crop reflectance corresponding to the sensitive wavelengths, a multiple-linear regression model was developed (R2=0.71, RMSE=1.74, P
ICAR-IARI
 
Date 2019-03-20T06:36:21Z
2019-03-20T06:36:21Z
2014-01-01
 
Type Article
 
Identifier Spinger
1876-7184
http://krishi.icar.gov.in/jspui/handle/123456789/17536
 
Language English
 
Relation Not Available;
 
Publisher Not Available