By Heidib
Mid Glamorgan,
United Kingdom 
ID please - Can you tell me what this apple tree rot is please?
In the course of a week, my apple tree has developed this all over its leaves. I can't tell if its cedar apple rust or frog eye rust or something else. Can someone help identify? I have googled but don't really see a difference in some of the photos.
Whatever it is, can I do anything to combat it ? Have I lost my tree?
5 Jun, 2019
Answers
Looks like Apple Leaf Scab. Some varieties are more susceptible than others. Make sure that you pick up all the dead and infected leaves. I don't think that there is a cure but you can try Bordeaux Mixture to prevent further onset.
6 Jun, 2019
Looks like what we call rust which is a fungal infection caused by moist mild conditions. As mentioned above, dispose infected leaves and treat tree with fungicide.
9 Jun, 2019
Could be scab, a fungal infection.
Try the Garden Focused website for further id with pictures & advice on treatment, very good site!
6 Jun, 2019