Plant Health Care Report issue 2017-8

July 14, 2017

The scouting report of The Morton Arboretum for July 14, 2017.


PDF iconPlant_Health_Care_Report_2017_8 (PDF)



Bartlett Tree Experts, Presenting Sponsor of the Plant Clinic


Quick View

What indicator plant is in bloom at the Arboretum?
Queen Anne’s lace (Daucus carota) is in flower


Accumulated Growing Degree Days (Base 50): 1315 (as of July 13)
Accumulated Growing Degree Days (Base 30): 3851 (as of July 13)


Insects/other pests

  • Viburnum leaf beetle update
  • Head-clipping weevil
  • Foliar nematodes
  • Redbud leaf folder
  • Galls, chapter 4



  • Tar spot of maple
  • Island chlorosis
  • Black spot on elm



  • Chlorosis