Damage Agents and Defects

View the full image

Prolific branch formation below where stem was girdled by a "ziptie"
View the full image

Stem forking
View the full image

Alder bark beetle (Alniphagus aspericollis)
View the full image

Alder recovering from a broken top suffered after thinning. Near Coombs, BC
View the full image

Epicormic branches following broken tops from an ice storm. Near Sandy, OR
View the full image

Unknown stem canker
View the full image

Unknown stem canker
View the full image

Elk rub
View the full image

Poor form probaby the result of antler rub
View the full image

Alder flea beetle (Altica ambiens)
View the full image

Frost damage on young planted seedling
View the full image

Severe lean and forking
View the full image

Forking due to top beakage. Near Mt. Vernon, WA
View the full image

Maple Decay
View the full image

Clipped top from mountain beaver
View the full image

Nectria spp. stem cankers
View the full image

Nectria spp.
View the full image

Nectria spp. stem cankers
View the full image

Red heart in alder
View the full image

Red heart in alder
View the full image

Rough bark of alder (Didymosphaeria oregonensis)
View the full image

Septoria- severe case on young stem
View the full image

Septoria- note red color on undersides of infected leaves
View the full image

"Spiraling"
View the full image

10 year old pruned alder. Edge tree showing basal sprouts. Near Vernonia, OR
View the full image

10 year old pruned alder. Edge tree showing sunscald. Near Vernonia, OR
View the full image

10 year old pruned alder. Edge tree showing sunscald. Near Vernonia, OR
View the full image

Sunscald on planted seedling
View the full image

Severe sunscald on 6 year old alder. Near Vernonia, OR
View the full image

Sprouting caused from dieback due to sunscald. Near Vernonia, OR