The scouting report of The Morton Arboretum for May 11, 2018.
What indicator plant is in bloom at the Arboretum?
Koreanspice viburnum (Viburnum carlesii) is in full flower.
Accumulated Growing Degree Days (Base 50): 200 (as of May 10)
Accumulated Growing Degree Days (Base 30): 1057 ( as of May 10)
- Viburnum leaf beetle
- European pine sawfly update
- Elm flea weevil
- Eastern tent caterpillar update
- Carpenter bees
- Hydrangea borer
- Cytospora canker
- Rhizosphaera needlecast
- Volutella revisited
- Timing for EAB treatments
Bartlett Tree Experts, Presenting Sponsor of the Plant Clinic