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

被引:90
作者
Yang, Chwen-Ming [1 ]
机构
[1] Agr Res Inst Taiwan, Crop Sci Div, Wufeng 41301, Taichung Hsien, Taiwan
关键词
Canopy hyperspectral reflectance; Multiple linear regression; Spectral characteristics; Spectral index; Disease severity; SPECTRAL CHARACTERISTICS; RESISTANCE; LEAVES; GENES;
D O I
10.1007/s11119-009-9122-4
中图分类号
S [农业科学];
学科分类号
082806 [农业信息与电气工程];
摘要
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.
引用
收藏
页码:61 / 81
页数:21
相关论文
共 41 条
[1]
PROGRESS OF BACTERIAL-BLIGHT ON RICE CULTIVARS CARRYING DIFFERENT XA GENES FOR RESISTANCE IN THE FIELD [J].
ADHIKARI, TB ;
MEW, TW ;
TENG, PS .
PLANT DISEASE, 1994, 78 (01) :73-77
[2]
Spectral reflectance of dehydrating leaves: measurements and modelling [J].
Aldakheel, YY ;
Danson, FM .
INTERNATIONAL JOURNAL OF REMOTE SENSING, 1997, 18 (17) :3683-3690
[3]
[Anonymous], 1985, COMMONWEALTH MYCOLOG
[4]
Biophysical and biochemical sources of variability in canopy reflectance [J].
Asner, GP .
REMOTE SENSING OF ENVIRONMENT, 1998, 64 (03) :234-253
[5]
Barrett EC, 1992, INTRO ENV REMOTE SEN
[6]
Leaf optical properties in higher plants: Linking spectral characteristics to stress and chlorophyll concentration [J].
Carter, GA ;
Knapp, AK .
AMERICAN JOURNAL OF BOTANY, 2001, 88 (04) :677-684
[7]
Rice bacterial leaf blight: Field experiments, systems analysis and damage coefficients [J].
Elings, A ;
Reddy, PR ;
Marimuthu, T ;
Rossing, WAH ;
Jansen, MJW ;
Teng, PS .
FIELD CROPS RESEARCH, 1997, 51 (1-2) :113-131
[8]
FEI FW, 2002, PLANT PROTECTION HDB
[9]
*FOR IM, 2008, TREES PLANTS STAND T
[10]
*GEOPH ENV RES COR, 1996, GER 2600 US MAN VERS