Assessment of the severity of bacterial leaf blight in rice using canopy hyperspectral reflectance

Chwen-Ming Yang

doi:10.1007/s11119-009-9122-4

Assessment of the severity of bacterial leaf blight in rice using canopy hyperspectral reflectance

Journal

Precision Agriculture

Journal Volume

11

Journal Issue

1

Pages

61-81

Date Issued

2010-02

Date

2010-02

Author(s)

Chwen-Ming Yang

DOI

10.1007/s11119-009-9122-4

URI

https://scholars.tari.gov.tw/handle/123456789/1751

https://link.springer.com/article/10.1007%2Fs11119-009-9122-4

Abstract

Bacterial leaf blight (BLB) is an important vascular disease of irrigated rice and serious infestations may cause a significant loss of yield. This study analyzed hyperspectral canopy reflectance spectra of two rice cultivars with different susceptibilities to BLB to establish spectral models for assessing disease severity for future site-specific management. The results indicated that wavebands from 757 to 1039 nm were the most sensitive region of the spectrum for the moderately susceptible cultivar TNG 67, whereas most narrow bands showed a significant relationship for the highly susceptible cultivar TCS 10. All the spectral indices (SIs) calculated had significant relationships with proportions of infested area in cultivar TCS 10, but only two SIs correlated significantly with cultivar TNG 67. The relation between the severity of the disease and spectral reflectance for the less susceptible cultivar TNG 67 can be improved by using a multiple linear regression approach.

Subjects

Canopy hyperspectral reflectance

Multiple linear regression

Spectral characteristics

Spectral index

Disease severity

Publisher

Springer

Type

journal article

File(s)

Name

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Size

21.96 KB

Format

HTML

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