Tree Mortality and Top-Kill Related to Defoliation by the Douglas-Fir Tussock Moth in the Blue Mountains Outbreak

摘要

Tree damage was studied from 1972 to 1976 following a severe DFTM (Douglas Fir Tussock Moth) outbreak. Tree mortality was strongly related to percent defoliation with most occurring in trees defoliated 90 percent or more. Top-kill was also more severe in heavily defoliated trees.