 Prolific branch formation below where stem was girdled by a "ziptie" |
 Stem forking |
 Alder bark beetle (Alniphagus aspericollis) |
 Alder recovering from a broken top suffered after thinning. Near Coombs, BC. |
 Epicormic branches following broken tops from an ice storm. Near Sandy, OR. |
 Unknown stem canker |
 Unknown stem canker |
 Elk rub |
 Poor form probaby the result of antler rub. |
 Alder flea beetle (Altica ambiens) |
 Frost damage on young planted seedling |
 Severe lean and forking |
 Forking due to top beakage. Near Mt. Vernon, WA. |
 Maple Decay |
 Clipped top from mountain beaver |
 Nectria spp. stem cankers |
 Nectria spp. |
 Nectria spp. stem cankers |
 Red heart in alder |
 Red heart in alder |
 Rough bark of alder (Didymosphaeria oregonensis) |
 Septoria- severe case on young stem |
 Septoria- note red color on undersides of infected leaves |
 "Spiraling" |
 10 year old pruned alder. Edge tree showing basal sprouts. Near Vernonia, OR. |
 10 year old pruned alder. Edge tree showing sunscald. Near Vernonia, OR. |
 10 year old pruned alder. Edge tree showing sunscald. Near Vernonia, OR. |
 Sunscald on planted seedling |
 Severe sunscald on 6 year old alder. Near Vernonia, OR. |
 Sprouting caused from dieback due to sunscald. Near Vernonia, OR. |