Bark of mature Fraser fir,Abies fraseri(Pursh.) Poir, from Mt. Mitchell, N.C., and Mt. Rogers, Va., was artificially wounded and treated with chemicals (naphthalene acetic acid, pectinase, or todomatsuic acid) suspected to be in association with balsam woolly adelgid,Adelges piceae(Ratzeburg), attack. α-and β-pinene, δ-3-carene, and limonene were the only monoterpenes found in Fraser fir at both locations. There were no differences in monoterpene content between wounds and controls at either site, but bark samples from firs at Mt. Rogers contained lower percentages of α-pinene and δ-3-carene than firs at Mt. Mitchell. Sapwood tissue beneath adelgid wool masses at the above sites and Roan Mt. were also analyzed for monoterpenes. Infested trees at Mt. Rogers contained less α and β-pinene than uninfested controls. There were no differences at Mt. Mitchell or Roan Mt.