fbpx Plant Health Care Report issue 2020-3 | The Morton Arboretum

Plant Health Care Report issue 2020-3

May 1, 2020

The scouting report of The Morton Arboretum for May 1, 2020.


PDF iconPlant Health Care Report issue 3 for May 1, 2020 


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What indicator plant is in bloom in Dupage County? I have 3 separate reports of this flowering in Dupage and Cook Counties.
Korean spice viburnum (Viburnum carlesii) is in flower

Accumulated Growing Degree Days (Base 50): 65 (as of April 30)
Accumulated Growing Degree Days (Base 30): 947 (as of April 30)


Insects/other pests

  • Spring is weird (again)
  • Eastern tent caterpillar
  • European pine sawfly
  • Gypsy moth
  • Viburnum leaf beetle



  • Cedar apple rust
  • Cytospora canker
  • Rhizosphaera needle cast



  • Creeping bellflower



  • Wise use of pesticides


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