ANN	artificial neural network
ANOVA	analysis of variance
ARI	anthocyanin reflectance index
BPNN	back propagation neural network
BRT	boosted regression tree
BSR	basal stem rot
CART	classification and regression trees
CBC	citrus bacterial canker
CCCV	coconut cadang-cadang viroid
CNN	convolutional neural network
CWA	continuous wavelet analysis
CWT	continuous wavelet transform
DCNN	deep convolutional neural network
ELM	extreme learning machine
FDI	fusarium disease index
FHB	fusarium head blight
GA	genetic algorithm
GAN	generative adversarial nets
GI	greenness index
GPR	Gaussian process regression
HLB	huanglongbing (citrus greening)
HRS	hyperspectral remote sensing
HIS	hue, saturation, intensity
IPM	integrated pest management
k-NN	k-nearest neighbors algorithm
LDA	linear discriminant analysis
LRDSI	leaf rust disease severity index
LSM	least squares method
LS-SVM	least squares–support vector machine
LSTM	long-term short–term memory
MLP–ARD	multilayer perceptron with automated relevance determination
MLR	multiple linear regression
MNF	minimum noise fraction
MSR	modified simple ratio
MTMF	mixture tuned matched filtering
NBNDVI	narrow-band normalized difference vegetation index
NCA	neighborhood component analysis
NDSI	normalized difference spectral index
NDVI	normalized difference vegetation index,
NIR	near-infrared wavelength diapason
NRI	nitrogen reflectance index
OR-AC-GAN	outlier removal auxiliary classifier generative adversarial nets
OS	orange spotting
PCA	principal component analysis
PCoA	principal coordinate analysis
PCR	polymerase chain reaction
PhRI	physiological reflectance index
PLS-DA	partial least squares-discriminate analysis
PLSR	partial least square regression
RNN	recurrent neural network
PRI	photochemical reflectance index
PSRI	plant senescence reflectance index,
PVY	potato virus y
REP	red-edge position or red-edge point
RWP	red-well point
RF	random forest
RVSI	red-edge vegetation stress index
SAM	spectral angle mapping
SID	spectral information divergence
SIPI	structural independent pigment index
SMA	spectral mixture analysis
SPA	successive projections algorithm
SVI	spectral vegetation index
SVM	support vector machine
SVR	support vector regression
SWIR	short-wave infrared region
ToCV	tomato chlorosis virus
TMV	tobacco mosaic virus
TSWV	tomato spotted wilt virus
UAV	unmanned aerial vehicle
VIS	visible wavelength diapason
VIS-NIR	visible and near-infrared wavelength diapason
ν-SVR	ν support vector regression
XY-F	xy-fusion network
YR	yellow rust