Birch Trees
Q.

Silver Birch trees

Zone SO 52 | Anonymous added on October 7, 2017 | Answered

What does cankers on silver Birch trees look like and can spores affect Rose bushes nearby?

A.
A.Answers to this queston: Add Answer
Downtoearthdigs
Certified GKH Gardening Expert
Answered on October 8, 2017

http://extension.colostate.edu/topic-areas/yard-garden/cytospora-canker-2-937/
http://www.mortonarb.org/trees-plants/tree-and-plant-advice/help-diseases/canker-diseases
https://extension.psu.edu/pests/plant-diseases/all-fact-sheets/cankers

I am not sure what is happening to the birch trunks in the pictures, but here is some information on canker diseases in birch and other trees. A university extension agent or arborist may also be able to help you diagnose your tree's problem.

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