Ask a Question forum: weeping crabapple tree with discolored leaves

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Name: Heather
(Zone 5b)
heatherr
May 20, 2016 11:03 AM CST
Hi, I have what I think is a type of weeping crabapple tree with discolored leaves. Any ideas?
Thank you!
Heather
Thumb of 2016-05-20/heatherr/de06bc


Thumb of 2016-05-20/heatherr/b19e91

Name: Sue
Ontario, Canada (Zone 4a)
Daylilies Birds Enjoys or suffers cold winters Native Plants and Wildflowers Butterflies Annuals
Region: Canadian Keeps Horses Dog Lover Plant Identifier Garden Sages
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sooby
May 20, 2016 12:17 PM CST
Welcome! Heather. Are the leaves just discoloured or are they eventually dying? Do you see any of the upper, less weeping, branches developing a bent over top, rather like a shepherd's crook?
Name: Heather
(Zone 5b)
heatherr
May 21, 2016 11:18 AM CST
There are a very small number of leaves that are dying, and all the branches toward the top just appear to be "weeping" in the same manner.
Name: Sue
Ontario, Canada (Zone 4a)
Daylilies Birds Enjoys or suffers cold winters Native Plants and Wildflowers Butterflies Annuals
Region: Canadian Keeps Horses Dog Lover Plant Identifier Garden Sages
Image
sooby
May 21, 2016 12:04 PM CST
Just trying to rule out fireblight - as far as I can see it isn't all the leaves on the affected branches anyway, which it probably would be with fireblight. It looks a bit close to the house foundation so I wonder if it is stressed. Has it ever done this before?
Name: Heather
(Zone 5b)
heatherr
May 21, 2016 12:58 PM CST
Hi, thanks for replying. Yes, it's about 6' from the foundation. And no, not all of the leaves on the affected branches. Bought the house a couple years ago, last spring it didn't look great but I don't remember it looking this bad. Do you think it could be a virus? My neighbors think they had a virus affecting some trees/shrubs, but don't know if it would cause this type of effect? Thank you.
Name: Sue
Ontario, Canada (Zone 4a)
Daylilies Birds Enjoys or suffers cold winters Native Plants and Wildflowers Butterflies Annuals
Region: Canadian Keeps Horses Dog Lover Plant Identifier Garden Sages
Image
sooby
May 22, 2016 6:22 AM CST
I don't think it's a virus from a quick look through a list of apple viral diseases but I'm not any kind of expert in apple disorders. The odd thing is that the leaves are randomly discoloured rather than confined to a specific stem. I was thinking it might be nutritional but I don't think that would affect random leaves. I don't know what a crabapple that is more resistant to fireblight might do with that disease.

If you're in the United States you could ask your local Extension service because they should have a good idea of the apple problems in your local area (we're assuming it is a crabapple but is there any chance it isn't?) unless someone else here has any ideas. Have you checked underneath the discoloured leaves for mites or other pests?

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