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Pest Alert Eastern White Pine Needle Damage NA-PR-01-11

Eastern white pine is widespread and highly valued in New England. During the summer of 2010, white pine needle damage was frequently observed throughout New England. Symptoms consisted of yellow and brown discoloration of 1-year-old needles on both mature trees and regeneration. Trees most severely affected were growing at the edge of bodies of water; in wet areas; and on dry, steep slopes. This damage has been attributed to two foliar diseases, Canavirgella needle cast caused by the fungus Canavirgella banfieldii and brown spot needle blight caused by the fungus Mycosphaerella dearnessii. Wet spring weather favors spore formation, dispersal, and infection by both fungi. It is likely that wet spring weather during several consecutive years was conducive to an outbreak of one or both of these diseases. Bifusella linearis, another pathogen that causes needle cast disease, was also found.  

PDF Download: Year of Publication:
2012
ID: 
NA-PR-01-11
Author: 
Munck, Isabel A.; Ostrofsky, William D.; Burns, Barbara
Availability: 
Online
Topic:
Forests
Insects and Diseases
Pest Alert  Eastern White Pine Needle Damage NA-PR-01-11
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https://www.fs.usda.gov/naspf/publications/eastern-white-pine-needle-damage-0