Identifying Subalpine Fir (Abies lasiocarpa) Attacked by the Balsam Woolly Adelgid (Adelges piceae) Using Spectral Measurements of the Foliage

Table 2

Narrow spectral wavebands available for selection in the stepwise discriminant analysis.

Waveband center (nm)	Spectral location
𝜌549	Green reflectance maximum
𝜌670	Red absorption maximum
𝜌856	Peak in the spectral response difference
𝜌980	H2O absorption well
𝜌1074	NIR reflectance peak, peak in the spectral response difference
𝜌1243	H2O absorption well edge, peak in the spectral response difference
𝜌1641	SWIR reflectance peak, peak in the spectral response difference
𝜌1912	H2O absorption well edge, peak in the spectral response difference
𝜌2185	SWIR reflectance peak