Abstract
Three recent infestations of the balsam woolly aphid, Chemes piceae Ratzeburg, were examined to determine approximately when they began and by what means the aphid may have reached the infested areas. Infestations were dated by the numbers of trees involved and by sectioning recently killed trees and examining them for red wood caused by aphid feeding. The aphid reached Mt. Sterling in the Great Smoky Mountains National Park Prior to 1958, Roan Mountain in 1958, and Grandfather Mountain in 1959. Of the possible dispersion agents, it is Concluded that wind is the most likely.
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