Study on the spectral characteristics of the damaged rice under brown planthopper, Nilaparvata lugens

Xiuju Wu; Qian Cheng

doi:10.1117/12.869427

16 November 2010 Study on the spectral characteristics of the damaged rice under brown planthopper, Nilaparvata lugens

Xiuju Wu, Qian Cheng

Author Affiliations +

Proceedings Volume 7857, Multispectral, Hyperspectral, and Ultraspectral Remote Sensing Technology, Techniques, and Applications III; 785716 (2010) https://doi.org/10.1117/12.869427
Event: SPIE Asia-Pacific Remote Sensing, 2010, Incheon, Korea, Republic of

Abstract

The spectra of healthy leaves and leaves damaged by the rice brown planthopper (BPH, Nilaparvata lugens) were measured using a Spectroradiometer with spectral range of 350-1050 nm and resolution of 3 nm. The data was analyzed using the method of red edge methods. In the range of 430-530 nm and 560-730cnm, the band depth and slope were calculated. The damage degrees of rice plants caused by the BPH nymphae with different numbers were measured well by the spectral reflectance. The spectral characteristics of damaged rice under brown Planthopper, Nilaparvata lugenswere analyzed, and the reflectance was significantly negatively correlated with the number of BPHs. The red edge slope and edge area of the reflectance also significance correlated with the number of nymphae. The estimation models were constructed to estimate the BPHs using the spectral reflectance at the wavelengths of 550 nm and 760 nm and the red edge index. The results showed that accuracy of the estimation models were 66-81% and the spectral reflectance at R755 was efficient for estimating the number of BPHs.

Citation Download Citation

Xiuju Wu and Qian Cheng "Study on the spectral characteristics of the damaged rice under brown planthopper, Nilaparvata lugens", Proc. SPIE 7857, Multispectral, Hyperspectral, and Ultraspectral Remote Sensing Technology, Techniques, and Applications III, 785716 (16 November 2010); https://doi.org/10.1117/12.869427

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