Disease
|
Description
|
Treatment Calendar
|
Photo
|
| Anthracnose |
Several species attack trees such as Sycamore, Ash, and Maple causing significant stress and potential death. |
March – June |
 |
| Cytospora Canker |
Bacterial disease that affects aspen, cottonwood, mountain ash, spruce and others. Very difficult to control. |
March – April & June – July |
 |
| Dutch Elm Disease |
Although not as prevalent as in the 70’s and 80’s, Dutch elm disease is can be terminal to American elm trees. Fungus carried by elm bark beetle. Preventative treatments effective. |
April – July |
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| Fireblight |
A very aggressive bacterial disease that attacks Apple, Crab-apple, Pear, Peach, Mountain Ash and Hawthorn. Treatable with ArborJet. |
March – August |
 |
| Gummosis |
A form of Cytospora Canker, gummosis attacks peach, cherry, apricot and plum. Very destructive. |
March- April & June- July |
 |
| Powdery Mildew |
A fungal disease which infects leaves of trees and shrubs such as Apple, Lilac and Roses. Leaves will have a light powdery look. Fungicide applications can help. |
March – April |
 |
| Thyronectria Canker |
A fungal disease that kills the living bark and outer wood of honeylocusts. |
No Control |
|
| 1000 Canker Disease |
A terminal disease for walnut trees. Vectored by the walnut twig borer. |
Late Summer |
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