The scouting report of The Morton Arboretum for April 17, 2020.
What indicator plant is in bloom in Dupage County?
Corneliancherry dogwood (Cornus mas) is still in full flower
Accumulated Growing Degree Days (Base 50): 40 (as of April 16)
Accumulated Growing Degree Days (Base 30): 684.5 (as of April 16)
- Zimmerman pine moth
- Peachtree borer
- Hydrangea borer
- Cedar rust
- Diplodia tip blight
- Volutella blight on pachysandra.
- Crown gall
- Black knot
- Ficaria verna, a weed of many names
- Crabgrass preventer update
- A little thought about growing degree days
- Vole damage