The Scouting Report of The Morton Arboretum for June 7, 2013.
What indicator plant is in bloom at the Arboretum?
Arrowwood Viburnum (Viburnum dentatum) is in bloom
Accumulated Growing Degree Days (Base 50): 464 (as of June 6)
Accumulated Growing Degree Days (Base 30): 1730 (as of June 6)
- More galls
- Downy leaf spot on hickory
- Oak anthracnose
- Fire blight
- More viruses
- Poison hemlock
- Non-pest problems