fbpx Plant Health Care Report issue 2019-6 | The Morton Arboretum

Plant Health Care Report issue 2019-6

June 14, 2019

The scouting report of The Morton Arboretum for June 14, 2019.

PDF iconPlant Health Care Report issue 2019-6 (PDF)

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

Accumulated Growing Degree Days (Base 50): 521.5 (as of June 13)
Accumulated Growing Degree Days (Base 30): 2138.5 (as of June 13)


Insects/other pests

  • Rose slug sawfly
  • Four-lined plantbug
  • Grape flea beetle
  • Pine spittlebug
  • More beneficials



  • Anthracnose of shade trees
  • Sycamore anthracnose
  • Downy leaf spot on hickory
  • Witchhazel blight
  • Guignardia on ivy



  • Late leafing out, dieback and weather-related chlorosis



  • Creeping bellflower
  • Helleborine



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