Q: I don't know what this is on my oak tree, but is it anything I should be concerned about (see reader's photo)? Should I spray with something? A: Unfortunately, I suspect your tree has hypoxylon ...
Purdue Landscape Report: Dieback and canker diseases caused by Botryosphaeria, Sphaeropsis, Diplodia and other closely related fungal pathogens are exceptionally common on woody landscape plants. This ...
DEAR NEIL: I read that hypoxylon canker is killing thousands of oaks that have been stressed by severe drought. I have a ranch about 30 miles north of San Antonio, and oaks are dying all over the Hill ...
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