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Old 04-23-2013, 01:42 PM
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Mesophyll collapse is usually not associated with the yellowing, as it is the release of fluids from the cells underlying those containing chlorophyll.

No diagnostic pro here, but I am leaning toward a bacterial or fungal spotting. While it is not a 100% correlation, that CAN be due to a calcium deficiency.

Ray Barkalow
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