The scouting report of The Morton Arboretum for May 15, 2020.
What indicator plant is in bloom in Dupage County?
Common lilac (Syringa vulgaris) is beginning to flower
Accumulated Growing Degree Days (Base 50): 121.5 (as of May 14)
Accumulated Growing Degree Days (Base 30): 1231.5 (as of May 14)
- Viburnum leaf beetle update
- Hydrangea leaftier
- Pine needle scale
- Murder hornet
- Ralstonia pest alert
- Wetwood and slime flux
- Phomopsis tip blight
- Plant viruses
- Bishop’s Weed