Discolouration of azalea leaves

Try looking up 'rhododendron lace bug'.
Are there any insects on the underside of the leaves and rusty brown spots ?
These do occur on azaleas and other evergreens.

Thanks Aster, it was lace bug

Oh thanks Pip,it's nice to hear of a good result,I hope your azalea is fully recovered :)

It's funny, I was very slack and didn't do anything about it, but it seems to have cleared up naturally :-)

Your plant must be healthy to shrug them off anyway lol

Or I could be not looking hard enough lol

I had a similar experience with my photinia,had the black spots so I cut off most of the leaves.Was ok for that summer then -same spots over winter. I left it and they disappeared of their own accord !!