Orange Spots on Apple Leaves

[cinari]

This is a Gala apple tree. Do you know:

1) what these spots are (maybe one of the rust diseases?)?
2) how I can treat it?
3) how can I prevent future contamination?

View attachment 301802

View attachment 301803

Thank you.

 

[Raintree]

This is a Gala apple tree. Do you know:

1) what these spots are (maybe one of the rust diseases?)?
2) how I can treat it?
3) how can I prevent future contamination?

View attachment 301802

View attachment 301803

Thank you.

1) Yes, Apple Rust, Cedar or Hawthorn.
2) IMHO not at damaging levels to warrant fungicide treatments.
3) Remove Cedar/Hawthorn trees, prune for air flow through tree.

 

[victorsteel]

Cedar-apple, cedar-hawthorn, and cedar-quince rust are common diseases of apple and flowering crab. These rust fungi spend a portion of their life cycle on rosaceous hosts such as apple, flowering crab, and hawthorn, and another portion on species of Juniperus . These rust fungi can result in considerable damage to rosaceous plants by causing premature defoliation and fruit distortion and abortion. The effects of these diseases on junipers are minimal.

 

[cinari]

Thank you very much.

 

[B Harrison]

I cut all the Junipers down and ground them into mulch, my apples still suffered this year as i was a week too late this year, but i hope my cedars where the culprit and not some neighbors, as they might not like me cutting down their trees.