fbpx Plant Health Care Report issue 2020-2 | The Morton Arboretum

Plant Health Care Report issue 2020-2

April 17, 2020

The scouting report of The Morton Arboretum for April 17, 2020.

PDF iconPlant Health Care Report issue 2 for 2020 (PDF)


Quick View

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)


Insects/other pests

  • 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
  • Lichens
  • Vole damage
  • Rabbits


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