Citrus > Citrus General Discussion

Please help read yellowing citrus leaves

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Isaac-1:
The attached photo is of leaves collected from one of my in ground young Satsuma trees in Louisiana.      The yellow leaf issue started about 6-8 months ago, and may be getting worse.  The vast majority of the leaves are still like the green one shown in the photo, however there are some solid yellow leaves, and  several of the blotchy ones.      The yellow leaves easily detach from the tree.   I have CLM on all of my 9 in ground citrus trees, though it tends to be worse later in the year, I also just discovered Cottony Scale on another of my young Satsumas which is planted about 50 feet away from the one where I collected these leaves.  The other trees appear healthy other than some CLM  damaged leaves.

thanks for your help
Ike

Isaac-1:
Someone must have some thoughts

Millet:
The only thing that I can think is a nitrogen deficiency, but the yellowing pattern is a little some what different than normal.  When the deficiency is less sever nitrogen deficiency shows up on the older leaves of the tree, while the newer leaves will still have some green.  In a sever case totally yellow leaves with no variation of color, or yellow-orange veins with a little green out on the sides.  What is your fertilizing schedule for this tree, and what do you use?

Lory:
Isaac I ask you a maybe stupid question: are there other trees in the nearby whose roots can get to your satsuma?
I had exactly the same "weird" yellowing pattern on one of my pomelos a couple of year ago.
At last i found out it was rootbund by a thick net of feeding roots from a neighbour tree (a muntingia calabura) which were literally suffocating the pomelo interfering with its normal nutrients uptake

Isaac-1:
The last year or so I was using Epsoma Citrus Tone to fertilize all my in ground citrus, feeding generally Feb - Aug every 6 weeks or so.  This spring I switched to a locally blended commercial fruit tree mix 18-9-11, which is much cheaper than the Epsoma Citrus Tone.  Also last year I did scatter some Azomite around all my fruit trees for the micro nutrients, and last year I added Epsom Salts around all my citrus, as my soil generally is extremely deficient in Magnesium, again same amount around the other younger citrus.  Soil testing this spring from the citrus area, still shows levels of Magnesium on the low side.   I have my citrus trees planted on a 25-30 foot spacing, arcing outward from my older mature citrus / fig tree, so root competition should not be a factor, also I have 3 other citrus trees planted about the same time on this arc (the one with the issue is 2nd from the end of the arc).

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