Hypoxylon canker causes a dark brown discoloration of the sapwood in post oaks in the Hill Country. – Photo courtesy of Texas A&M AgriLife Extension Service
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There’s a fungus amoung us
That post oak looked perfectly fine last November. Well okay, if you had to admit it, yes, the foliage might have looked thin, but we’ve been in a pretty bad drought these last couple of years. What tree wouldn’t have thin foliage, and this one has survived so far.
