I usually walk about checking our oak tree leaf lines. Sort of a early warning that an oak is in decline since it is easier to take out a sick tree than a dead one. I live in the woods. Today may tree guy tells me I have Oak Scorch and it killed a tree I thought was viral. Seems it is bacterial in nature and attacks ~80 % of the trees on my land. This is a bummer. Luckily we have Pine and White Oaks about and I introduced a few other tress like Hollies, Maples, Cherries, Kousa and others but if this gets on our forest will be a field. Below site is dated 2002.
Bill