Spectral measurements of eastern white pine, Pinus strobus, and eastern hemlocks, Tsuga canadensis, in North Carolina with two levels of infestation with hemlock woolly adelgid, Adelges tsugae.
Spectral measurements of eastern white pine, Pinus strobus, and eastern hemlocks, Tsuga canadensis, in North Carolina with two levels of infestation with hemlock woolly adelgid, Adelges tsugae. The spectral categories are: eastern white pine = green, recently infested but with no visible symptoms = blue and infested with visible symptoms = red.
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