Plant Health Care Report issue 2014-4

May 9, 2014

The scouting report of The Morton Arboretum for May 9, 2014.

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What indicator plant is in bloom at the Arboretum?

Apple serviceberry (Amelamchier x grandiflora) is in full bloom


Accumulated Growing Degree Days at The Morton Arboretum

Accumulated Growing Degree Days (Base 50): 76 (as of May 8)
Accumulated Growing Degree Days (Base 30): 788 (as of May 8)


  • European pine sawfly
  • European elm flea weevil
  • Elm leaf miner
  • Oystershell scale
  • Juniper scale
  • Juniper webworm
  • Brown hemlock needleminer
  • Boxwood psyllids



  • Volutella blight on pachysandra