Plant Health Care Report issue 2017-7

June 30, 2017

The scouting report of The Morton Arboretum for June 30, 2017.


PDF iconPlant_Health_Care_Report_2017_7 (PDF)


Bartlett Tree Experts--Presenting Sponsor of the Plant Clinic


Bartlett Tree Experts, Presenting Sponsor of the Plant Clinic

Quick View

What indicator plant is in bloom at the Arboretum?
Wild hydrangea (Hydrangea arborescens) is in flower


Accumulated Growing Degree Days (Base 50): 988.5 (as of June 29)
Accumulated Growing Degree Days (Base 30): 3244.5(as of June 29)


Insects/other pests

  • Japanese beetles
  • Kermes scale
  • Good guys
  • side of bacon
  • Grape phylloxera
  • Galls, Chapter 3



  • Powdery mildew
  • Guignardia on buckeye
  • Guignardia on Boston ivy
  • Witch-hazel leaf spot
  • Tubakia leaf spot



  • Helleborine
  • Wild parsnip