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Plant Health Care Report Issue 2012-01

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

Plant 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)

 

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

 

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