Cryptococcus fagisuga, commonly known as the beech scale or woolly beech scale, is a felted scale insect in the superfamily Coccoidea that infests beech trees of the genus Fagus. It is associated with the transmission of beech bark disease[3] because the puncture holes it makes in the bark allow entry of pathogenic fungi which have been identified as Nectria coccinea var. faginata and sometimes Nectria galligena.[4][5]
^Houston, D R (1994). "Major New Tree Disease Epidemics: Beech Bark Disease". Annual Review of Phytopathology. 32: 75–87. doi:10.1146/annurev.py.32.090194.000451.
^U.S. Department of Agriculture, Forest Service[permanent dead link][full citation needed]
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