Get Help from a Certified Arborist.

If you are asking this question and live in Edmonton, there is a good chance that it is Black Knot.

Professional Tree Service – Edmonton
Tree Service Experts
780-394-4024
For a free quote click here
Certified Arborists
Edmonton & area

 A certified arborist can help you remedy this common disease. Black Knot can devastate trees such as Maydays and Shubert Cherries. It is an air-bourne fungus that quickly spreads and can destroy a tree by deforming branches and constricting their growth. In its beginning stages, Black Knot emerges as small light brown inflammations, usually located on the tips of the outer branches. As the disease rapidly matures, the swellings appears olive green.  Finally, the knots darken and harden.
 
It is critical to hire an ISA Certified Arborist to remove the fungus. Homeowners who try and prune the trees themselves often cause further harm to the tree. Pruning tools need to be properly disinfected, or the disease can quickly spread from one diseased limb to the next. Proper pruning cuts that allow the tree to heal and conserve energy is also another reason to hire a qualified, local arborist. Tree Ninja excels in affordably treating and removing Black Knot in Edmonton & area. Call us today and let us save your tree!
 

Professional Tree Service – Edmonton
Tree Service Experts
780-394-4024
For a free quote click here
Certified Arborists
Edmonton & area

Please see the City of Edmonton’s website for further details about Black Knot: 
 
See also the Government of Alberta’s suggestions for Black Knot management: