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hayley_mchendry

Cedar apple rust has begun... now what?

9 years ago
last modified: 9 years ago

My husband and I bought 2 apple trees a few weeks ago. We noticed a few days ago that the have spots on the leaves. Ive been reading loads of stuff on the internet and i think it might be cedar apple rust. I sprayed yesterday with Immunox. As I read about how to use this fungicide, all of the directions are saying to apply it before signs of disease. My question is, can I expect to control this disease now that it has begun? Is so, how often should I apply? Thanks!

Comments (9)

  • 9 years ago

    Here is a badly affected leaf from the more severely affected of the two trees (Baldwin).

  • 9 years ago

    The best thing would have been to purchase resistant varieties if the problem is common in your area.

  • 9 years ago

    I believe it's too late to spray any more this yr. Spray at the appropriate time next yr. What you have is probably what you'll get this yr. It's not a season long issue.

  • 9 years ago

    Once the tree is infected there is no treating it for this year. CAR will not spread within the tree once it is infected. Once the galls on the cedars dry up in late spring there will be no further infection to your trees. As was already mentioned you need to prevent CAR before it infects the tree in the spring.

    Hayley McHendry thanked TurkeyCreekTrees Zone 5B
  • 9 years ago
    last modified: 9 years ago

    Thank You! The two varieties I have are Newtown Pippin and Baldwin.

    The cute little baby apples on the tree look fine. Do you think the fruit will be okay?

    I'm totally new to fruit trees. I've kept an organic vegetable garden for 15 years, but never apples. Like most things, it's trickier than it looks!

  • 9 years ago

    Where do you live? Baldwin does well in the Northeast. Not sure how it will do somewhere else. Both are moderatelt susceptible to diseases that are common to apples, Apple Cedar Rust, powdery mildew, fire blight, scab, etc. pests like coddling moths, apple maggot flies can damage apples, too.

    it would be some challeges to grow them organically. Google apple bagging. There are several threads about how to protect apples using plastic zip lock bags or nylon foot sox.

  • 9 years ago

    Hayley, Looks like CAR to me. I also had CAR the first year I planted. Not knowing about it I purchased 8 fruit trees of gala, honeycrisp, grannsmith, red delicious and a 4 in 1 cherry tree.

    I was very disappointed to see all my trees look like the leaf above. Did some research and found that my property is lined by cedar trees. I thought I would be doomed but after doing some research I decided to go with Immunox it wont do much to save you this year but next year you should get pretty good control of it.

    I start the spraying prior to the first rain when it is 60 degrees or higher. I apply every 10 days till summer time. It got rid of the CAR 100%. Once the temperature gets warm enough the spores a no longer in the air and your trees will be safe. Good Luck!

  • 9 years ago

    Cedar Apple Rust is NO big deal.


    Nothing to do this year. Next year a couple of applications of Immunox (Myclobutanil) easily available, starting at 1/2 green will do the trick.