The scouting report of The Morton Arboretum for July 12, 2019.
What indicator plant is in bloom at the Arboretum?
Panicled hydrangea (Hydrangea paniculata) is in full flower
Accumulated Growing Degree Days (Base 50): 1152 (as of July 11)
Accumulated Growing Degree Days (Base 30): 3329 (as of July 11)
- Phytophthora ramorum, sudden oak death and ramorum blight
- Powdery mildew
- Walnut anthracnose
- Slime mold, stink horns and mushrooms
- Japanese beetles and white grubs
- Head-clipping weevils
- Two-marked tree hoppers
- Viburnum leaf beetle update