Oak wilt moves 3 different ways. Bleeding cankers release spores, beetles can carry spores on their body. And last but not least is the root graft transmission. I would get the diseased trees out asap. The standing dead trees aren't a threat for transmission anymore. Make sure you sanitize...
What I've noticed in my area. Oak wilt starts the trees on a downward spiral and hypoxlon canker does them in. To an extent trenching exacerbates the hypoxlon case. We don't have near the cases of wilt that Texas has though
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