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Do my apple trees have a disease?

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Posted by nateshoe745 none (My Page) on
Mon, Sep 15, 14 at 22:59

I just planted my first set of apple trees this spring. 3 Honeycrisp and 2 Zestar. The Honeycrisps have stopped growing since around 2 months ago. Their leaves have been getting a spots on them along with turning black. The leaves are also very brittle. The Zestars appear to be growing healthy but they are starting to get a few spots on their leaves. Can anyone tell me what is on the trees and how to get rid of it?

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RE: Do my apple trees have a disease?

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  • Posted by fruitnut z7b-8a,4500ft SW TX (My Page) on
    Mon, Sep 15, 14 at 23:20

Those ugly leaves with different colors are apparently normal for Honeycrisp. Mine look the same way. It looks like a virus infection. But apparently isn't, I'm not sure there.

Anything else isn't serious for this time of yr. The only time worth treating for leaf damage is in spring.

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RE: Do my apple trees have a disease?

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totally normal like fruitnut says. Chlorotic leaves especially at the tips is a trait of Honeycrisp. It's a recessive gene and Minnestoa couldn't get rid of it. You can read about it at Univ. of Min. literature on the Honeycrisp. They all do it, don't worry about it. They usually develop it in the later part of mid-summer and it continually worsens towards fall.

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RE: Do my apple trees have a disease?

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Glad to here this condition is normal. I was about to give up on my Honeycrisp.

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In addition to the discoloration, looks like some minor insect damage. Honeycrisp is also highly susceptible to cedar apple rust, but that doesn't appear to be a problem based on your photos.

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RE: Do my apple trees have a disease?

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Thank you all for your help!

Here is another photo but of the Zestar leaves with a few white spots on them.

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RE: Do my apple trees have a disease?

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Rob, I've never heard of Honeycrisp being "highly" susceptible to anything. I've heard it described as being susceptible and I've heard it described as "somewhat resistant", but never "highly susceptible".
My own experience has beared out what I have read about all my apples and I would describe Honeycrisp as slightly resistant.
Goldrush for example is listed as susceptible and it indeed is.

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RE: Do my apple trees have a disease?

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Here in middle Tennessee, I would categorize it as "highly" susceptible. It does fine when sprayed, but left untreated the leaves eventually become nearly completely covered. I'd say about the same as Gold Rush, which I'd also consider as highly susceptible - at least in my climate.

I have another variety called "Gold Star", that even when treated still got a moderate amount of CAR. Would hate to see what it looks like untreated.

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RE: Do my apple trees have a disease?

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Just another reason I'm so drawn to the disease resistant varieties I guess. I keep everything sprayed and like you, I often have fungal or bacterial issues. I find insects easier to deal with than disease.

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