Author Topic: My trifolate orange has red vein down the middle  (Read 307 times)

Unicyclemike

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My trifolate orange has red vein down the middle
« on: September 24, 2022, 02:42:42 PM »
On one limb there are leaves that have this red vein down the middle.  Here is a photo.  What is this?


kumin

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Re: My trifolate orange has red vein down the middle
« Reply #1 on: September 24, 2022, 03:09:51 PM »
I see this on a few trees as the approach leaf drop in the Fall, especially if the trees are under stress. I've also seen in late Summer with bark/limb/root damage.

Millet

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Re: My trifolate orange has red vein down the middle
« Reply #2 on: September 25, 2022, 01:57:13 PM »
Possible nitrogen deficiency.  Symptom start out as yellow/orange veins with some green out on far side.

kumin

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Re: My trifolate orange has red vein down the middle
« Reply #3 on: September 26, 2022, 09:54:10 AM »

Red veins showing on a girdled seedling.


Girdled section on red -veined seedling. Note that the growth below the girdle doesn't have red leaves. In addition, the bark below the girdle is a deeper green. The off-green bark may be an related to the red leaves.


Additional seedling showing red in leaf.
« Last Edit: September 26, 2022, 10:17:03 AM by kumin »

Millet

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Re: My trifolate orange has red vein down the middle
« Reply #4 on: September 26, 2022, 10:26:19 AM »
looking at the first picture in the above post, I believe it is just fall coloration.

kumin

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Re: My trifolate orange has red vein down the middle
« Reply #5 on: September 26, 2022, 12:05:30 PM »
Millet, the 1st and 2nd photos are the same tree. This coloration didn't show up until recently, so Fall weather likely enhanced the effect.

vnomonee

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Re: My trifolate orange has red vein down the middle
« Reply #6 on: September 28, 2022, 07:06:07 PM »
Graft of fast flowering trifoliate on tai-tri also showing red on single leaf, graft acting independantly of root stock?




Can anyone chime in on I am wondering if the grafted scion of a deciduous citrus will go dormant even if the root stock doesn't? The inverse, in a colder climate how does this work say on a loquat (evergreen) grafted to a quince (deciduos)? I also have a Prague Chimera graft on this tai-tri.
« Last Edit: September 28, 2022, 07:08:00 PM by vnomonee »

 

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