Help with quince tree disease

[TheSpottedZebra]

For the 2nd year, my quince trees are ailing. They're probably 8ish years old, have been fine until last year, when the leaves started turning brown and dropping off. I thought it was some kind of fungus, picked up every leaf and binned it, and gave the trees a good manure mulch.

They looked healthy this year but suddenly it's happening again.

Any ideas?

Here is a pic of leaf with brown spots. Then the progression to more brown blotches, then it goes all brown and drops off.

I'm sure this happened later in the year last year.

Quince leaf blight. It's a fungal disease and worse in warm damp weather.

As long as you are not planning on eating any fruit off it, then use a proprietary spray fungicide available from garden centres. You are already clearing up diseased leaves, so carry on doing that as well.