[AnnaB]

A friend gave me quince tree years ago and because my orchard plans were a good from reality it lived in a pot.  Finally panted out 4 years ago it is growing but doesn't seem happy.
The leaves come out pale green and healthy looking then get black spots, shrivel up and drop off, new leaves then come further up the stems.
It has had small amounts of blossom tho' none this year but never any fruit.
I'm presuming this is quince leaf blight .....what can I do now most fungicides are unavailable
Is it contagious to my apple, pear and plum trees ?