Q.Mandarin orange tree
What is causing the underside of my mandarin orange tree leaves to go brown? And what is the cure.
Downtoearthdigs
Answered on January 30, 2019
My best guess here would be sodium toxicity. This is due to salty soil. This website will help you identify the problem further: http://ipm.ucanr.edu/PMG/C107/m107bpleaftwigdis.html
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