Plant Health Care Report issue 2017-1

April 7, 2017

The scouting report of The Morton Arboretum for April 7, 2017.

PDF iconPlant_Health_Care_Report_2017_1 (PDF)


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Bartlett Tree Experts, Presenting Sponsor of the Plant Clinic.

Quick View

What indicator plant is in bloom at the Arboretum?
Cornelian-cherry Dogwood is in late flower (Cornus mas)

Accumulated Growing Degree Days (Base 50): 33.5 (as of April 6)
Accumulated Growing Degree Days (Base 30): 683.5 (as of April 6)



  • Using growing degree days
  • Timing use of fungicides
  • Winter weather
  • Crabgrass preventer


Insects/other pests

  • Egg masses and more
  • Azalea bark scale
  • Hemlock needleminer
  • Boxwood leafminer
  • Jumping worms 



  • Boxwood blight (NEW DISEASE FOR ILLINOIS)
  • Cankers
  • Cedar rust
  • Volutella blight on pachysandra