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Plant Health Care Report Issue 2013-08

The Scouting Report of The Morton Arboretum for June 7, 2013.

PDF iconPlant Health Care Report 2013-08

Arrowwood viburnum (Viburnum dentatum)Arrowwood viburnum (Viburnum dentatum)photo: John Hagstrom

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What indicator plant is in bloom at the Arboretum?
Arrowwood Viburnum (Viburnum dentatum) is in bloom

Accumulated Growing Degree Days (Base 50): 464 (as of June 6)
Accumulated Growing Degree Days (Base 30): 1730 (as of June 6)


  • Leafrollers
  • Spittlebug
  • Aphids
  • More galls


  • Downy leaf spot on hickory
  • Oak anthracnose
  • Fire blight
  • More viruses


  • Poison hemlock
  • Non-pest problems
  • Chlorosis