Answers
Did you spray any chemical? I think it could be phytotoxicity. Generally, chemical like diuron (an algicide and herbicide) uptake causes this kind of symptoms.
According to University of California, "Leaf veins can turn yellow or white (vein clearing) after herbicide application due to citrus root uptake of bromacil or diuron. After simazine exposure, leaves yellow between veins with the chlorosis increasing in severity in proportion to the amount of herbicide exposure."
http://ipm.ucanr.edu/PMG/C107/m107bpl...
According to University of California, "Leaf veins can turn yellow or white (vein clearing) after herbicide application due to citrus root uptake of bromacil or diuron. After simazine exposure, leaves yellow between veins with the chlorosis increasing in severity in proportion to the amount of herbicide exposure."
http://ipm.ucanr.edu/PMG/C107/m107bpl...
When citrus roots take up too much diuron, major leaf veins turn yellow.
Posted
by: Dr. Ravishankar Narayana
(15 points)
Posted: October 17, 2017
golsam commented,
hello thank you very much for your answer, but we didn't spray any chemical so could it be beacause of virus? over 6 years ago.
hello thank you very much for your answer, but we didn't spray any chemical so could it be beacause of virus? over 6 years ago.
Dr. Ravishankar Narayana commented,
It is very hard to tell by only seeing the image. It needs to be confirmed by laboratory testing. How many trees are affected? over 6 years ago.
It is very hard to tell by only seeing the image. It needs to be confirmed by laboratory testing. How many trees are affected? over 6 years ago.
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