Help identifying problem with apple tree

josip

Earlier this year we planted a young Cox.
It started off well and new branches were growing.
Over the last week however, brown spots have started appearing on the leaves.
Does anyone know what might be causing these?

lazybones32

I've seen that before but the closest anyone came to identifying it was "a bacterial infection".

josip

I'm afraid that it might be root rot, which is supposed to be untreatable.

Velvet shank

apple scab perhaps?

http://www.rhs.org.uk/advice/profile?pid=81

looksee

There are several things it could be and they are a bit difficult to tell apart. Chances are it is a fungal disease and spraying with an appropriate fungicide could help. However the most reliable thing would be to put a few leaves in a plastic bag (so they can be seen without being handled) and go back to the nursery where you bought the tree and ask for advice.

j@utis

I have two small apple trees (3rd year) and they both have brown spots on their leaves exactly the same as in op's photo. I remember reading something about Scab last year and that you have to spray against it early in the spring but I forgot this year. One of my trees is more affected than the other. I think the weaker one is "Katja" variety, and I can't remember the name of the other which seems to be naturally more resistant against this disease.
I don't know whether scab affects fruiting but I tend to think that it might be the case because my trees were flowering like crazy and had loads of little apples set but later most of them had fallen off and now I can only count about 6 apples on each tree.

looksee

Yes, if it is scab it will definitely affect the fruit. I have a crab apple which is sometimes affected, then other years it is ok. There are no other trees around that are affected by scab so I don't worry about it too much.

josip

Nursery has advised that it probably a fungal infection given the weather we had in April andMay and sold me a container of bordeaux mixture.