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Bark exudate appearance

Exudates appear when the living bark is cut. Sometimes they are rather slow to appear. Exudates from the cambial layer or sapwood surface are not to be included in this category and, in fact, blazing should not be carried to this depth.

B 7 exudate clear B 8 exudate milky
B 9 exudate yellow B10 exudate red
B11 exudate absent