Does anyone know what issue these symptoms represent? It seems like the growth is also stunted in addition to the chlorosis. This is a Montmorency cherry that was grafted this year.
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What are the three round reddish things at the base of the leaf. Are they aphids? I can’t enlarge the pic enough to tell.
@JDARL Those red bumps on the leaf petiole are glands, which are normal part of the plant in many stonefruit. They are said to secrete honeydew and have relationship with ants.
@Palmy_Oceans Newer leaves are often lighter in color while older leaves should be much darker. Have you fertilized and watered? Is this in a pot? Is it outside?
There are about 25 grafts located in the greenhouse (including this). I water them well. These are in pots. These symptoms have worried me since they look similar to viral symptoms. However, I found an article online discussing the a disorder in Montmorency cherry when exposed to high greenhouse heat. The temp remains approx 90-100f throughout the day, and normal air temp during the night.
Here is the link https://naldc.nal.usda.gov/download/CAT87208503/PDF
The disorder is on page 272
Here are some better pictures
Is there a possibility that this is the issue?
Sorry @Palmy_Oceans, I don’t know about growing trees in greenhouses. 90-100f daytime temps are abnormally high for east coast in mid atlantic in the springtime. Another possible factor is the sunlight isn’t as strong in greenhouse and I’ve seen similar foliage in shade in other cherry tries.
Maybe @fruitnut can help here since he’s got a lot of experience with greenhouse grown trees.
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It could be the high temperatures but I haven’t seen that. Whatever it is it doesn’t appear serious. Watch it and see what happens.
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As a result of the symptoms, the growth also appears to be stunted. The internode length has decreased about 4 times it’s normal size.
I do want to note that these symptoms are only showing on new leaves and not the older ones.
In my experience, new leaves tend to be yellow compared to old leaves. Being in pots, those plants can only get available what’s in the pot, but I imagine you would have mixed very good soil and given enough soil volume for the roots to grow.
If you still suspect deficiency of some sort, but are not sure of what, you could give it some broad folilar spray. Fish emulsion and something like Southern Ag Chelated General Purpose Flower & Garden Nutritional Spray will cover macro and most micronutrients. I would lower the recommended dose since your is in pots.
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The chlorosis in the picture is not regular chlorosis such as in nutrient deficiency. Instead, it is an odd mottle that plants with a virus may have.
@fruitnut how hot does it usually get in your greenhouse during the day? I was just looking at my thermometer and when exposed to the sun it is reading 95-105f.
It’s in the 90s for about 8-10 hours in summer.
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Here is a better pic of the issue I was having with my cherries. Do you believe this could be a mottle virus or more likely from heat? I have been researching the differences and the visual symptoms of the rusty mottle virus in some cases seem quite similar to the disorder from heat.
