fbpx Plant Health Care Report issue 2020-6 | The Morton Arboretum

Plant Health Care Report issue 2020-6

June 12, 2020

The scouting report of The Morton Arboretum for June 12, 2020.

PDF iconPlant Health Care Report issue 6 for June 12, 2020


Quick View

What indicator plant is in bloom in Dupage County?
Arrowwood viburnum (Viburnum dentatum) is in flower

Accumulated Growing Degree Days (Base 50): 652.5 (as of June 11)
Accumulated Growing Degree Days (Base 30):  2322.5 (as of June 11)


Insects/other pests

  • Periodical cicadas
  • Viburnum leaf beetle update
  • Euonymus scale
  • Four-lined plantbug



  •  Apple scab
  • Powdery mildew on ninebark
  • Peach leaf curl
  • Brown rot of stone fruit
  • Guignardia on ivy



  • Helleborine



  • Brown ginkgo update



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