The scouting report of The Morton Arboretum for April 21, 2017.
Bartlett Tree Experts, Presenting Sponsor of the Plant Clinic.
What indicator plant is in bloom at the Arboretum? Eastern redbud is in early flower (Cercis canadensis)
Accumulated Growing Degree Days (Base 50): 121.5 (as of April 20)
Accumulated Growing Degree Days (Base 30): 1032 (as of April 20)
- Growing degree days rising quickly; be prepared
- Winter damage
- Elm bark beetles
- Spruce needleminers
- Juniper webworm
- Zimmerman pine moth
- Eastern tent caterpillar
- European pine sawfly
- Gypsy moth
- Cedar rust updated
- Phomopsis gall