The scouting report of The Morton Arboretum for May 17, 2019.
What indicator plant is in bloom at the Arboretum?
Korean spice viburnum (Viburnum carlesii) is in full flower
Accumulated Growing Degree Days (Base 50): 134.5 (as of May 16)
Accumulated Growing Degree Days (Base 30): 1193 (as of May 16)
- Viburnum leaf beetle
- Euonymus webworm
- Eastern tent caterpillar update
- European pine sawfly update
- Galls, part one
- Pine needle scale
- Spruce spider mites
- Wetwood and slime flux
- It was a hard winter, but…