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Apple Yellow Leaves

 
pollinator
Posts: 351
Location: Zone 8b Portland
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I've been looking all over trying to figure out what this is. This is a picture of a honeycrisp apple that is 3yrs old. We've been having a really hot year this year so I thought maybe it was heat stress. I also thought iron or nitrogen deficiency. Are there any leaf readers out there?
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Apple Leaf
 
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Posts: 582
Location: Lower Mainland British Columbia Canada Zone 8a/ Manchester Jamaica
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nitrogen deficiency is yellowing of the leaves, iron is yellowing of the leaves with green veins. The brown spots are not related.
Where i live nobody seems to know what im talking about when I say ferrous sulfate, so I had to resort to grinding up iron vitamin tablets and dissolving them with vinegar before mixing with allot of water. It saved my raspberry's twice and I did my fruit trees before they had a chance to show signs.

grinding up the iron tablet is something you can do tonight, try tomorrow and thee the results in 3 days, if you can get the sulfate that would be great and need less reapplication.
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