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Sumac Trees

Q.Our Sumac Trunk Split And Keeps Getting Worse I Was Able To Pull It Out Enough To Look Under And See Black

Zone Corona California | Anonymous added on July 22, 2024 | Answered

What is it and can it be treated?

A.Answers to this queston: Add Answer
GKH_Susan
Certified GKH Gardening Expert
Answered on July 24, 2024

It looks like wood boring insects have attacked the tree. You can see the entry holes and tunnels. It may be too late to save the tree since there is decay. You may want to contact your local extension agent for more information on local borers and canker. It may have started with a canker disease. Here is more:

https://www.gardeningknowhow.com/ornamental/trees/tgen/tree-borer-insects.htm

https://cisr.ucr.edu/sites/default/files/2019-07/pest_alert_pshb_and_fd.pdf

https://www.gardeningknowhow.com/plant-problems/disease/hypoxylon-canker-fungus.htm

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