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White masses looking like patches thick mold often occur on , especially about pruning wounds or other scars the trunk and branches and upon s. Beneath this substance are colonies of rusty colored or purplish brown plantlice known as "wooly aphids" on account of the appearance of white covering which is, however, really composed of waxen filaments. The species is common in Maine on , , and and some other .
— EDITH MARION PATCH