Tropical Fruit Forum - International Tropical Fruit Growers



Author Topic: What's wrong with my plant?  (Read 384 times)

mikkel

  • Member
  • ***
  • Posts: 228
    • Lueneburg, Germany Zone 7
    • View Profile
What's wrong with my plant?
« on: May 29, 2019, 09:58:04 AM »
This is a supposed US852. All new growth is yellowish and is barely growing. What is it?

A few weeks ago I repotted it and fertilized it. No reaction.
I haven't found any pests except a few brown spots.

Laaz

  • Hero Member
  • *****
  • Posts: 843
    • Charleston, SC 9a
    • View Profile
Re: What's wrong with my plant?
« Reply #1 on: May 29, 2019, 10:10:35 AM »
Check your roots.

mikkel

  • Member
  • ***
  • Posts: 228
    • Lueneburg, Germany Zone 7
    • View Profile
Re: What's wrong with my plant?
« Reply #2 on: May 29, 2019, 10:49:16 AM »
I thought of that too, but I didn't find any obvious damage. The roots seemed to be in order.
I`ll check again.

mikkel

  • Member
  • ***
  • Posts: 228
    • Lueneburg, Germany Zone 7
    • View Profile
Re: What's wrong with my plant?
« Reply #3 on: May 29, 2019, 11:15:04 AM »


roots seem to be fine. no dead ones.

Laaz

  • Hero Member
  • *****
  • Posts: 843
    • Charleston, SC 9a
    • View Profile
Re: What's wrong with my plant?
« Reply #4 on: May 29, 2019, 11:32:34 AM »
Best I can tell you at this point is try rinsing the roots in a diluted hydrogen peroxide / water mixture & replant in new soil.

Millet

  • Moderator
  • Hero Member
  • *****
  • Posts: 3209
    • Colorado
    • View Profile
Re: What's wrong with my plant?
« Reply #5 on: May 29, 2019, 12:29:07 PM »
I've never seen yellow citrus flowers before. 

Laaz

  • Hero Member
  • *****
  • Posts: 843
    • Charleston, SC 9a
    • View Profile
Re: What's wrong with my plant?
« Reply #6 on: May 29, 2019, 12:36:53 PM »
That's not flowers, it's new growth.

Millet

  • Moderator
  • Hero Member
  • *****
  • Posts: 3209
    • Colorado
    • View Profile
Re: What's wrong with my plant?
« Reply #7 on: May 29, 2019, 12:43:19 PM »
As it is new growth I think it is a nutrition problem,.

TooFarNorth

  • Member
  • ***
  • Posts: 213
    • U.S.A., Georgia, 8A
    • View Profile
Re: What's wrong with my plant?
« Reply #8 on: May 29, 2019, 12:57:15 PM »
I have had certain limbs show small and yellow growth after cold damage, but never the entire tree.


TFN

Laaz

  • Hero Member
  • *****
  • Posts: 843
    • Charleston, SC 9a
    • View Profile
Re: What's wrong with my plant?
« Reply #9 on: May 29, 2019, 01:13:35 PM »
May be some type of disease. Where did it come from & was it grown from seed or did you buy the plant?

mikkel

  • Member
  • ***
  • Posts: 228
    • Lueneburg, Germany Zone 7
    • View Profile
Re: What's wrong with my plant?
« Reply #10 on: May 29, 2019, 01:33:49 PM »
it came from citrus centre.
But it was totally fine last year.

Laaz

  • Hero Member
  • *****
  • Posts: 843
    • Charleston, SC 9a
    • View Profile
Re: What's wrong with my plant?
« Reply #11 on: May 29, 2019, 01:48:05 PM »
Some diseases take time to show up. I take it it's grafted?

mikkel

  • Member
  • ***
  • Posts: 228
    • Lueneburg, Germany Zone 7
    • View Profile
Re: What's wrong with my plant?
« Reply #12 on: May 29, 2019, 01:58:06 PM »
yes

Laaz

  • Hero Member
  • *****
  • Posts: 843
    • Charleston, SC 9a
    • View Profile
Re: What's wrong with my plant?
« Reply #13 on: May 29, 2019, 02:08:21 PM »
What is the rootstock?

Laaz

  • Hero Member
  • *****
  • Posts: 843
    • Charleston, SC 9a
    • View Profile

Laaz

  • Hero Member
  • *****
  • Posts: 843
    • Charleston, SC 9a
    • View Profile
Re: What's wrong with my plant?
« Reply #15 on: May 29, 2019, 02:16:19 PM »
Also Dr. Manner is a member here, try contacting him.

Malcolm Manners

Email:    mmanners@flsouthern.edu

Laaz

  • Hero Member
  • *****
  • Posts: 843
    • Charleston, SC 9a
    • View Profile

mikkel

  • Member
  • ***
  • Posts: 228
    • Lueneburg, Germany Zone 7
    • View Profile
Re: What's wrong with my plant?
« Reply #17 on: May 29, 2019, 02:44:28 PM »
I will. Thank you for your help!

mikkel

  • Member
  • ***
  • Posts: 228
    • Lueneburg, Germany Zone 7
    • View Profile
Re: What's wrong with my plant?
« Reply #18 on: May 29, 2019, 03:00:26 PM »
What is the rootstock?

I cannot tell. Poncirus or Citrumelo I guess.

Laaz

  • Hero Member
  • *****
  • Posts: 843
    • Charleston, SC 9a
    • View Profile
Re: What's wrong with my plant?
« Reply #19 on: May 29, 2019, 03:05:39 PM »
Possible it is a incompatibility issue, but like I said contact Dr. Manners.

Ilya11

  • Hero Member
  • *****
  • Posts: 562
    • France, Paris region, Vaux le Penil, middle of Northern z8
    • View Profile
Re: What's wrong with my plant?
« Reply #20 on: May 29, 2019, 04:20:52 PM »
I have a large plant of poncirusXSunki hybrid in the ground, its new growth is always pale, but becomes green with the time.
Could be a general feature of citrandarins , since Z253 in a pot also has initially a very pale  growth.

[/url
« Last Edit: May 29, 2019, 04:24:28 PM by Ilya11 »
Best regards,
                       Ilya

lebmung

  • Sr. Member
  • ****
  • Posts: 484
    • Romania, Bucharest,7b (inside city 8a)
    • View Profile
    • Plante tropicale
Re: What's wrong with my plant?
« Reply #21 on: May 29, 2019, 06:42:31 PM »
This is a root problem. Even though you inspected the roots visually.
I have 3 pt that I got from someone last year. I washed the roots and changed the soil early in the spring. The leaves look exactly the same. It seems like nitrogen is not absorbed by the roots.
One of the pots I sprayed it with urea low-b after few times the leaves turned dak green.
« Last Edit: May 30, 2019, 02:43:11 AM by lebmung »

mikkel

  • Member
  • ***
  • Posts: 228
    • Lueneburg, Germany Zone 7
    • View Profile
Re: What's wrong with my plant?
« Reply #22 on: May 30, 2019, 01:54:09 AM »
What is urea low-b? Couldn`t find it with google. Did you spray the roots or the leaves?
Thank you!

lebmung

  • Sr. Member
  • ****
  • Posts: 484
    • Romania, Bucharest,7b (inside city 8a)
    • View Profile
    • Plante tropicale
Re: What's wrong with my plant?
« Reply #23 on: May 30, 2019, 02:39:49 AM »
Low biuret urea, you can spray leaves safely at 1500 ppm, 25% of the nitrogen is absorbed whithin an hour. Spray in evening and don't allow direct sun for 2 days after. Mist with water daily several times.
Correcting the N in leaves makes the plant to produce more sugars and others which in turn feed the root development and defense system. This is because of higher photosynthesis.
« Last Edit: May 30, 2019, 02:47:08 AM by lebmung »

Millet

  • Moderator
  • Hero Member
  • *****
  • Posts: 3209
    • Colorado
    • View Profile
Re: What's wrong with my plant?
« Reply #24 on: May 30, 2019, 11:10:00 AM »
I spray my trees 3 times a year with low biuret urea.  I have never withheld the trees from the sun light the following day, and have never seen a problem.  A light misting would be good .  Doing so will increase the urea up take by the tree.

mikkel

  • Member
  • ***
  • Posts: 228
    • Lueneburg, Germany Zone 7
    • View Profile
Re: What's wrong with my plant?
« Reply #25 on: June 11, 2019, 05:16:22 PM »
Spraying did not thelp so far.Most leaves are brown and dead now Only two are bigger now but still chlorotic.
One branch is completely dead.

Bomand

  • Member
  • ***
  • Posts: 138
    • LouisianaCFDFMY
    • View Profile
Re: What's wrong with my plant?
« Reply #26 on: June 11, 2019, 05:26:07 PM »
Got a pic?

mikkel

  • Member
  • ***
  • Posts: 228
    • Lueneburg, Germany Zone 7
    • View Profile
Re: What's wrong with my plant?
« Reply #27 on: June 11, 2019, 05:36:00 PM »
Not much different than before. But without leaves. It's dark now. I'll try it tomorrow.

 

Copyright © Tropical Fruit Forum - International Tropical Fruit Growers