Plant Health Care Report Issue 2013-06

May 24, 2013

The Scouting Report of The Morton Arboretum for May 24, 2013.

PDF iconPlant Health Care Report 2013-06


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What indicator plant is in bloom at the Arboretum?
Black locust (Robinia pseudoacacia) is in bloom

Black locust (Robinia pseudoacacia)
Black locust (Robinia pseudoacacia)
photo: John Hagstrom

Accumulated Growing Degree Days (Base 50): 303.5 (as of May 23)
Accumulated Growing Degree Days (Base 30): 1294.5 (as of May 23)



  • Rose slug sawfly
  • Bagworm
  • Oak leaf roller
  • Galls, galls, galls
  • Rose plume moth



  • Ash anthracnose
  • Golden canker