Solved Lumpy apple leaves - disease ID please

Good evening

Noticed this horrible lumpy leaf on my Jonagold apple tree. Anybody know what it is?


The only thing I can relate it to from lens is gall but I'm not sure.

Thanks

 

• Hi on net it said it can be a number of things
• Insect damage
• Fungal disease called cedar-apple rust that affects a range of trees. The fungus causes reddish or orange spots to appear on the leaves of the apple tree, as well as galls, which form on juniper trees.
• Oak apple galls, which are 1- to 2-inch diameter round growths on oak leaves and are caused by wasps. The “apples” are filled with a spongy mass that contains a single, hard, seed-like cell. As the galls mature they become papery.

 

Only one apple this year as I cut it back hard last year but said apple is blemish free. This tree has no luck. Last year it was mildew!

 

A couple of things:
1) Cedar Apple Rust is an American problem, as far as I can see. You have to be careful with net searches and check if a disease/insect is a UK issue.
2) Oak apple galls are found on oak trees, caused by a small wasp laying an egg, the gall is essentially a nursery for the larvae.
So that leaves you with insect damage, probably caused a while ago. I wouldn't worry about it this late in the season and just rake up the leaves and dispose of when they fall off.

 

It's very similar to a problem I have had with grapes, not saying it's exactly the same, but similar.

I think it may be insect attack earlier in the season and needs treatment when it starts.
Wouldn't like to say what the insect is, I've never nailed it down.
Possibly some kind of blister mite.