Need help on English Oak with brown spots.

[Jose Fonseca]

Hi Bonsai team,

Have a question regarding English oak and diseases management. I am seeing brown spots which seem to be "Tubakia Leaf Spot". Everywhere I read about this issue it mentions to not use fungicides. I was wondering if anyone has had this issue? and how they control it? I have add some photo for you to examine.

 

[Wires_Guy_wires]

Fungicides mess up the fungal biome of the oak, and oaks need their fungal biome.
But hydrogen peroxide and copper sulphate (as a spray on the foliage and never the roots) could help.
Then again, oaks lose their foliage every year and it'll be gone by winter.

 

[rockm]

This could be a lot of things. Your location would help advice.

 

[Jose Fonseca]

This could be a lot of things. Your location would help advice.

Thanks for point that out I should have added it to the message above. I am located in Morton Grove a suburb near Chicago, Illinois.

 

[Jose Fonseca]

Fungicides mess up the fungal biome of the oak, and oaks need their fungal biome.
But hydrogen peroxide and copper sulphate (as a spray on the foliage and never the roots) could help.
Then again, oaks lose their foliage every year and it'll be gone by winter.

I have both of these products. I will wipe a certain leaves with one and other leaves with the other see if I notice any difference. Thanks for the information.

 

[Bnana]

Have you looked at wild oaks growing in the forest? These kinds of things are normal this time of year. The leaves aren't meant to last. I wouldn't treat a tree like this and just let it shed its leaves in autumn.

 

[Eckhoffw]

Sorry, can’t help with the spots. Seems all my trees have some leaf damage these days.
Great tree though. I would love to have an oak like that!
Any idea of the age?

 

[Jose Fonseca]

Sorry, can’t help with the spots. Seems all my trees have some leaf damage these days.
Great tree though. I would love to have an oak like that!
Any idea of the age?

The tree was collect on a side of a building in California as a seedling 30years ago. Then was planted here in Illinois to grow as a bonsai and 3 years ago was potted into that container. So I would say about 31 years in the making.