The Scouting Report of The Morton Arboretum for May 17, 2013.
What indicator plant is in bloom at the Arboretum?
Redbud (Cercis canadensis) is in late bloom
Horsechestnut (Aesculus hippocastanum) is blooming
Accumulated Growing Degree Days (Base 50): 171 (as of May 16)
Accumulated Growing Degree Days (Base 30): 1022 (as of May 16)
- Viburnum crown borer
- Brown marmorated stink bug
- Wooly alder aphid
- Eastern tent caterpillar
- Elm bark beetle
- Elm leafminer
- European elm flea weevil
- Apple scab
- Rust on buckthorn