fbpx Plant Health Care Report issue 2019-4 | The Morton Arboretum

Plant Health Care Report issue 2019-4

May 17, 2019

The scouting report of The Morton Arboretum for May 17, 2019.


PDF iconPlant Health Care Report issue 4 for 2019 (PDF)


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What indicator plant is in bloom at the Arboretum?
Korean spice viburnum (Viburnum carlesii) is in full flower

Accumulated Growing Degree Days (Base 50): 134.5 (as of May 16)
Accumulated Growing Degree Days (Base 30): 1193 (as of May 16)


Insects/other pests

  • Viburnum leaf beetle
  • Euonymus webworm
  • Eastern tent caterpillar update
  • European pine sawfly update
  • Galls, part one
  • Pine needle scale
  • Spruce spider mites



  • Viruses
  • Wetwood and slime flux



  • It was a hard winter, but…



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