| Diseases According to Location of Injury | ||
| Foliage | Stem or Branch | Root |
| Anthracnose |
Black knot | Armillaria root rot |
| Apple scab | Crown gall Dieback of hardwoods | Annosum root rot |
| Boxelder leaf blight | Dutch elm disease |
|
| Catalpa leafspot | European poplar canker |
|
| Diplodia tip blight | Fire blight |
|
| Hawthorn leaf blight | Hypoxylon canker | |
| Horse-Chestnut leaf blotch | Juniper blight | |
| Powdery mildew | Juniper rusts |
|
| Winter browning | Nectria canker |
|
| Yellow leaf blotch | Scleroderris canker | |
| Spruce canker Sweetfern blister rust | ||
| Verticillium wilt | ||
| White pine blister rust | ||
Return to Table of Contents (Common Pests of Trees in Ontario)
