I have just bought a new property that has a range of oak trees. Unfortunately, I noticed that some of the young trees in one area have a white discolouration of the leaves.
After some searching online, I think this is oak powdery mildew (erysiphe alphitoides).
In this question, the only answer discusses using a sulphur fungicide.
I would like to ask:
- Is this powdery mildew?
- Are there any other options for managing it and can it be completely cured?
- Are the nearby mature oaks at risk?