Apple espalier leaves curling, yellowing, shriveling on one branch #245053 - Ask Extension


Apple espalier leaves curling, yellowing, shriveling on one branch #245053

Asked May 17, 2015, 2:35 PM EDT

The leaves on one secondary branch of my apple espalier are curling/rolling towards the center. Some are yellow. I don't see aphids or any other obvious pest. I did see a white cocoon-like spot within one of the curled leaves. The rest of the tree look fine with apples on the way. I just sprayed all the tree with Dr. Earth fruit Tree Insect Killer ( aphids, scale, whiteflies, mites, earwigs and more!). Diagnosis and any other recommendations?

Marion County Oregon

Expert Response


Curling of the leaves might be induced  by leafrollers, and the "cocoon" you found might be a sign of the presence of those. Lerafrollers are small larvae of various moths. I'm not so sure about the yellowing and shrivelling of the leaves. Is it possible to send a photo of the damaged limb to the email address below?
Neil Bell Replied May 18, 2015, 2:30 PM EDT
Hope these help.
The Question Asker Replied May 18, 2015, 4:37 PM EDT
Is the espalier plant composed of more than one apple cultivar? Or is it all the same cultivar?
Neil Bell Replied May 20, 2015, 12:30 PM EDT
Neil, yes this is a multiple cultivar.  Unfortunately, the affected branch doesn't have a tag.  There are 6 branches: on the bottom tier there is one tag on the left - Granny Smith;  second tier is Lodi and Jonagold; and top tier is Fuji on the left and no tag on the right ( the affected branch).  Might the top and bottom tiers be the same cultivar on each side?  
The Question Asker Replied May 20, 2015, 1:45 PM EDT
As for how many cultivars are on the plant I don't know, but your count suggests that it could indeed be 6 cultivars. Complicated! So that one branch is responding to...something...we have not yet identified, One thing though, the product you sprayed can in some instances cause phytotoxicity-did you notice the curling/spotting after you sprayed, or before? Why don't you send me a picture of the whole plant, but send it to my email address directly. Working through AAE is too complicated.
Neil Bell Replied May 20, 2015, 2:44 PM EDT

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