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Table 3 Physiological factors values corresponding to different canopy colors

From: Combining WV-2 images and tree physiological factors to detect damage stages of Populus gansuensis by Asian longhorned beetle (Anoplophora glabripennis) at the tree level

Canopy color Measured variation DBH (cm) LAI Exit hole level Dead twig level Damaged shoot ratio (%)
Green Avg 30.207 2.407 1.849 1.644 31.301
stdev 6.341 0.328 0.328 1.059 20.582
range 23 1.575 3.000 2.000 60.000
Yellow Avg 26.982 2.290 2.167 2.181 42.778
stdev 6.616 0.258 0.435 1.012 19.661
range 22 1.475 2.000 3.000 40.000
Grey Avg 27.174 2.122 3.464 3.565 70.942
stdev 6.813 0.435 0.258 1.036 25.786
range 18 2.225 3.000 3.000 60.000