Damage caused by the fungus Scleroderris in plantations and nurseries in Europe and North America.

This article evaluates the quantity of damage caused by Scleroderris lagerbergii Gremmen in plantations and nurseries of Europe and North America. The fungus, familiar to a relatively small number of research scientists and foresters, is a factor of major economic importance and warrants extensive study. An awareness of the magnitude of its damage should stimulate research, leading to improved disease control and considerable savings. In estimating reliably the quantity of damage, it is vital to know the number of trees infected, frequency of mortality, age of trees and other factors which result in economic loss.