Weak foliage

[Gerard]

I have two trees in completely different positions in the garden, a maple and a prunis. Both trees have weak areas and normal growth.



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[Raging Bull]

Hi Gerard,
Bit hard to tell from the photos, but are the weak growth sections grafted on? It almost looks like they are.

[Beano]

Could they have copped some weed killer accidentally?

[Gerard]

One affected branch is grafted but has had strong growth for years. Weed killer is extremely unlikely, this is the new spring growth not a dieback situation

[Jarad]

Curl gubs munching roots on the affected side of the trees?

[Beano]

Yeah, was wondering as it looked like those tiny leaves you get with glycophosphate. If it was weed killer the whole tree should be affected I would have thought. Maybe Jarad is correct?

[Gerard]

I am inclined to believe there is something going on with the roots, I had curl grubs once many years ago in a purchased tree but never in mt own mix which is about 50% diatomite.
was hoping for a confident response before I explore but I think now I must check.

[treeman]

I don't like the look of that at all Gerard. I have never seen it here and I never want to! I don't know what it is but have you looked into Phytoplasma?
Do you think you may have used the same pruners on both trees one after the other?
Have a close look for mites while you're at it.
If you cant find out what it is I recommend taking it to a plant pathology lab. I think Burnley had one at one time or Melbourne Uni.

[Gerard]

I repotted one of the trees, roots were clear of pests and strong new tips. I need to do more reading and watching