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Maple tree not looking well in South Salem #878983

Asked July 27, 2024, 9:00 AM EDT

Hi all! I am reaching out for some direction on what to do here, I have a maple tree that is showing some distress. I am not sure if this is a fungus or what it may be? I have enclosed 3 pictures that I hope will show the issue. I am in South Salem, these trees are exposed to direct sunlight. If there is anymore information you need please let me know! This tress is also about 10 years of age and the ground it red clay. Thank you Scott Morse

Marion County Oregon

Expert Response

Thanks for reaching out. 

Unfortunately, this looks like a disease called bleeding canker caused by Phytophthora. You can read more about it here. (note: This page has a mix of home gardener and commercial landscaper information. There are no fungicides labeled for home gardeners.)

Since this is a large tree, I recommend reaching out to a certified arborist. They will be able to come out and give you a recommendation on what steps to take. Sometimes trees with this disease can live with the problem for quite a while, but it really depends. Not all tree care companies have a certified arborist on staff. You can find a list through the Pacific Northwest ISA (opens as PDF.)

Best of luck!
Brooke Edmunds Oregon State University Extension Community Horticulturist Replied July 29, 2024, 5:50 PM EDT

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