The scouting report of The Morton Arboretum for May 5, 2015.
What indicator plant is in bloom at the Arboretum?
Horse chestnut (Aesculus hippocastanum) is in early flower
Accumulated Growing Degree Days (Base 50): 171.5 (as of May 4)
Accumulated Growing Degree Days (Base 30): 1326.5 (as of May 4)
- Wise use of pesticides
- Replacing ash trees (or just planning for an additional tree in the landscape)
- Viburnum leaf beetle
- Euonymus webworm
- Boxwood psyllid
- European elm flea weevil
- Hackberry nipple gall psyllid
- Pine bark adelgid
- Crown gall
- Rust on buckthorn
- Ficaria verna, a weed of many names