Occurrence of Malacosoma disstria in Pennsylvania (US)
In 1994, severe defoliation caused by Malacosoma disstria (EPPO A1 quarantine pest) and other native insects was observed on Acer saccharum in northern and south-central Pennsylvania (US). Subsequent refoliation of trees in affected stands was extremely poor and the presence of a fungi, Discula campestris was noted. Affected stands then showed extensive crown dieback and potential for significant tree mortality for 1995.
Sources
Hall, T.J. (1995) Effect of forest tent caterpillar and Discula campestris on sugar maple in Pennsylvania in 1994.
Abstracts of presentations made at the 1995 APS annual meeting, Pittsburgh, Pennsylvania, 1995-09-12/16.
Phytopathology, 85(10), p 1129.