Ask a Question forum: Powdery mildew or oak wilt?

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Cenurion, South Africa
Moofey
Jan 10, 2018 11:16 AM CST
I've had these oak trees in pots for about three years. Somewhere along the way they've picked something up, though. If I understand correctly oak wilt would usually kill a tree within a year, these have been sick for more than a year and I cant seem to get them better. The leafs grow normally until they are just about fully matured, then they start to develop white, dry spots and begin to die.
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Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
Garden Sages Plant Identifier
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DaisyI
Jan 10, 2018 12:06 PM CST
Welcome!

Its not Oak Wilt. Oak Wilt is transmitted from tree to tree by insects or through entwined root systems (and also, they would be dead). It does look like a fungus of some sort though. Do you have them in a spot that gets plenty of sunshine and good air circulation?
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

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Cenurion, South Africa
Moofey
Jan 11, 2018 2:08 AM CST
That is good to know. I do, yes. In that case I'll just try a different fungucide. Thanks for your reply.
Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
Garden Sages Plant Identifier
Image
DaisyI
Jan 11, 2018 10:22 AM CST
What kind of oaks are you growing? Do they naturally live in areas that have wet spring and dry summers? Are you losing the first leaves of spring or summer leaves?
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

Webmaster: osnnv.org

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