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Looks like regular old leaves to me. They do yellow and fall off after a year or so. If you tree has lots of new growth I wouldn't worry
Have you noticed any lopsided fruit or die back?
I finally got the pictures to load to a size that I could actually see. I noticed that the yellow blotches do not create a mirror image on either side of the mid vein as would be typical of a nutritional issue. This condition is known as blotchy mottle and is one of the early symptoms of HLB (citrus greening). I highly suspect that your tree has it even though it is not common in California to my knowledge.
This tree is not just showing one problem, or one deficiency. Have you been fertilizing this tree on a regular basis, and with a fertilizer that contains trace minerals? A 9 ear old citrus tree should be fertilized three times a year between March and September.
Quote from: Galatians522 on March 23, 2021, 11:03:05 PMI finally got the pictures to load to a size that I could actually see. I noticed that the yellow blotches do not create a mirror image on either side of the mid vein as would be typical of a nutritional issue. This condition is known as blotchy mottle and is one of the early symptoms of HLB (citrus greening). I highly suspect that your tree has it even though it is not common in California to my knowledge.There is no known cases of citrus greening disease in this part of California yet. If it really the disease as you suspected, could it be from the seed grown? I bought the fruits from supermarket, saved and planted the seeds.