Plant Health Care Report Issue 2012-01

April 6, 2012

The Scouting Report of The Morton Arboretum for April 6, 2012.

PDF iconPlant Health Care Report 2012-01.pdf


Included in this issue: 


Wayfaring Tree Viburnum (Viburnum lantana)
Wayfaring Tree Viburnum (Viburnum lantana)
This week's indicator plants
  • Wayfaring tree viburnum (Viburnum lantana) - early bloom
  • Redbud (Cercis canadensis) - late bloom


Weather Update
  • Accumulated Growing Degree Days (Base 50): 225 (as of April 5)
  • Accumulated Growing Degree Days (Base 30): 969.5 (as of April 5)


  • Strange winter and spring
  • Lichens
  • "What are degree days and why do we care about them anyway?" By Donna Danielson, M.S.


  • Eastern tent caterpillar
  • Gypsy moth
  • Woolly alder aphid
  • Boxwood psyllids
  • European pine sawfly
  • Larch casebearer
  • Juniper webworm
  • Pine bark adelgids
  • Zimmerman pine moth
Cedar rust diseases
Rhizosphaera needle cast