fbpx Plant Health Care Report issue 2019-8 | The Morton Arboretum

Plant Health Care Report issue 2019-8

July 12, 2019

The scouting report of The Morton Arboretum for July 12, 2019.


PDF iconPlant Health Care Report issue 2019-8.pdf


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What indicator plant is in bloom at the Arboretum?
Panicled hydrangea (Hydrangea paniculata) is in full flower

Accumulated Growing Degree Days (Base 50): 1152 (as of July 11)
Accumulated Growing Degree Days (Base 30): 3329 (as of July 11)




  • Phytophthora ramorum, sudden oak death and ramorum blight
  • Powdery mildew
  • Walnut anthracnose
  • Slime mold, stink horns and mushrooms


Insects/other pests

  • Japanese beetles and white grubs
  • Head-clipping weevils
  • Two-marked tree hoppers
  • Viburnum leaf beetle update


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