Author Topic: Yuzu Leaf Diagnosis - Hypopigmentation?  (Read 357 times)

Piss P

  • Member
  • ***
  • Posts: 20
    • Southern Indiana (6a)
    • View Profile
Yuzu Leaf Diagnosis - Hypopigmentation?
« on: September 22, 2021, 11:51:38 AM »
Hey All,

I have a young Yuzu that I recently brought indoors for the winter and I am noticing some yellow spots developing on the leaves (pics below). My thoughts are either a reaction to being moved indoors under new light or a nutrient deficiency. Let me know if y'all want more pics or info.

Any and all advice/thoughts about what could be going on are welcomed!

Thanks
pp




tedburn

  • Member
  • ***
  • Posts: 123
    • Mühlacker, zone 7
    • View Profile
Re: Yuzu Leaf Diagnosis - Hypopigmentation?
« Reply #1 on: September 22, 2021, 06:04:48 PM »
perhaps this link can help you
https://www.yara.fr/fertilisation/solutions-pour-cultures/agrumes/carences-agrumes/ even if it is in french
regards Frank

Piss P

  • Member
  • ***
  • Posts: 20
    • Southern Indiana (6a)
    • View Profile
Re: Yuzu Leaf Diagnosis - Hypopigmentation?
« Reply #2 on: September 23, 2021, 09:01:04 AM »
Danke Frank!

For posterity I will be following up on this.

Looking further, I now believe it is mesophyll collapse that came about via water stress (I err on underwatering vs overwatering) or root damage/stress from transplantation. My initial inkling came from this http://ipm.ucanr.edu/PMG/W/A-CI-WSNE-FO.001.html and I became confident in this diagnosis after reading https://www.ncbi.nlm.nih.gov/pmc/articles/PMC438118/pdf/plntphys00285-0149.pdf.

Mg deficiency is my second guess so I am going to throw some MgSO4 at the base for good measure. 

pp

Millet

  • Moderator
  • Hero Member
  • *****
  • Posts: 4312
    • Colorado
    • View Profile
Re: Yuzu Leaf Diagnosis - Hypopigmentation?
« Reply #3 on: September 23, 2021, 10:26:37 AM »
Piss P your tree's leaves certainly are not showing a Magnesium deficiency.  The symptoms for a magnesium deficiency is a darker green delta shape at the bottom of the leaf structure on an other wise green leaf.

Piss P

  • Member
  • ***
  • Posts: 20
    • Southern Indiana (6a)
    • View Profile
Re: Yuzu Leaf Diagnosis - Hypopigmentation?
« Reply #4 on: September 23, 2021, 10:47:53 AM »
Millet - good to know. Appreciate it! Any thoughts on my diagnosis?

incubator01

  • Member
  • ***
  • Posts: 90
    • Belgium, Central Europe
    • View Profile
Re: Yuzu Leaf Diagnosis - Hypopigmentation?
« Reply #5 on: October 02, 2021, 06:15:31 AM »
the back of that leaf certainly has a lot of dark dots, if it's not dirt, it could be bugs? (mites, aphids?)
Try spraying the back of those leaves with water so they're clean and see if it gets worse or the spots come back. If so you may need some neem oil based product.

Indoors many plants get insects because it's a lot warmer there, I had armored scale in january once on a kaffir lime, it was terrible :( there was a whole colony on every branch.

 

SMF spam blocked by CleanTalk