Stress triggered tree diseases, The diebacks and declines

Abstract

Traditionally, dieback and decline diseases of trees have been described in generalities, attributed to unknown or mysterious causes, and thought to be beyond the scope of human intervention. This publication provides a basis for understanding and coping with these diseases. Discussed are concepts relating to: (1) diagnosing the factors that initiate the disease; (2) describing symptoms and disease development; (3) determining the role of secondary-action organisms; and (4) developing appropriate control measures. The concepts presented here are drawn from more than 15 years of research on diebacks and declines conducted by the author and by his colleagues, Drs. Johnson Parker and Philip M. Wargo. Dr. Wargo's research on the relationship of stress-induced changes in trees and susceptibility to microorganisms has especially contributed to our understanding of these complex diseases.

Citation

Houston, David R. 1981. Stress triggered tree diseases, The diebacks and declines. NE-INF-41-81. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 36 p.