Plant Health Care Report Issue 2013-15

August 9, 2013

The Scouting Report of The Morton Arboretum for Aug 9, 2013.

PDF iconPlant Health Care Report 2013-15

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Panicled hydrangea (Hydrangea paniculata)
Panicled hydrangea (Hydrangea paniculata)
photo: John Hagstrom

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

Accumulated Growing Degree Days (Base 50): 1781.5 (as of Aug 8)
Accumulated Growing Degree Days (Base 30): 4307.5 (as of Aug 8)


  • Emerald ash borer after 10 years
  • Red milkweed beetle
  • …and milkweed bug
  • Cypress twig gall
  • Tortoise beetle
  • Banded longhorn beetle


  • Melampsora rust
  • Fungal problems on kerria


  • Sycamore bark falling off
  • Urban tree care conference for professionals