![](https://extension.udel.edu/ornamentals/files/2018/09/Crabapple-Late-Season-2018-300x220.jpg)
Crabapple tree defoliated due to fungal leaf
spot. Photo credit: N. Gregory
![](https://extension.udel.edu/ornamentals/files/2018/09/Cicada-killer-by-Kenneth-R-Law-USDA-AHPIS-PPQ-Bugwood-300x225.jpg)
Cicada killer. Photo credit: Kenneth R. Law, USDA APHIS PPQ, Bugwood.org
![](https://extension.udel.edu/ornamentals/files/2018/09/Ehornet-1-300x219.jpg)
European hornet. Photo credit: B. Kunkel
![](https://extension.udel.edu/ornamentals/files/2018/09/Bacterial-leaf-scorch-oak-annotated-300x225.jpg)
Bacterial Leaf Scorch on northern red oak. Photo credit: N. Gregory