I would guess Cedar Apple Rust. Not sure though. Probably someone on here will be able to tell for sure. It could have more than one disease. My trees with CAR didn’t have the large black areas. It looks like a small tree. Is it still in a pot? I would seriously consider not planting it unless you have another area with no cedars. What variety is it? Some varieties are much more resistant than others.
I’m going to do some grafting on mine and change the variety of some of the branches.
posted 1 week ago
Thanks, Ken! I believe its a Honey Crisp. It is small, but not in a pot....its been in the ground for 2 years now, planted as bare root.
If you have pictures of the area around the base of the tree and a full tree shot Scott, that can be really helpful.
Good drainage and healthy soil with lots of organic matter can help the tree better fight off diseases. Like Ken mentioned, some apple varieties seem to be susceptible to certain diseases, even in the most ideal situation.
I'm not sure where your location is, but my Honeycrisp struggles here in our warmer climate, as it seems to prefer colder climates.
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posted 1 week ago
Thanks, Steve. I'll take some more pics this weekend. We live in the Willamette Valley of Oregon - Dundee to be specific. A very damp/humid summer which may have contributed to it?
From this one photo that is fire blight, fire blight tends to only affect the leaves not the stems like CAR. Car will infect the branch as well as the leaves.
Honey Crisp trees are actually meant for zones 4-6, they have a requirement of more cold days than most apples and they don't do well from zone 7 thru 10.
I'd try to get some really good compost to make an aerated tea with then spray the whole tree and the soil around the roots.
After that first treatment try to use a compost tea to water the tree two weeks after the spraying.