Author Topic: Citrus leaf pic - iron deficiency?  (Read 1424 times)

Coach62

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Citrus leaf pic - iron deficiency?
« on: July 18, 2018, 09:33:37 PM »
Here is a pic of new leaf growth on a grapefruit tree that has been in the ground for 2 years.  I do use a good grade of citrus fertilizer with micro nutrients, but the last batch I bought I think only had 1% iron. 

To me, this looks like iron deficiency, please let me know if you have an educated opinion.  I also think it could use a touch more nitrogen, just a touch - agree??

Here are the pics.  The second pic is slightly out of focus, but has light coming through from the back. 






This is what I bought for an iron drench.  https://www.amazon.com/dp/B0053NDZJW/ref=cm_cr_ryp_prd_ttl_sol_7
« Last Edit: July 18, 2018, 09:48:26 PM by Coach62 »
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lebmung

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Re: Citrus leaf pic - iron deficiency?
« Reply #1 on: July 19, 2018, 06:59:08 AM »
Check the pH of the soil. Iron gets block by other nutrients. A high concentration will not do any good 0.1 vs 1%.It's all about absorption. Foliar spray at 10 days interval is better.

bsbullie

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Re: Citrus leaf pic - iron deficiency?
« Reply #2 on: July 19, 2018, 07:10:47 AM »
Your responses will be best if you post in the citrus section of the forum.
- Rob

greenman62

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Re: Citrus leaf pic - iron deficiency?
« Reply #3 on: July 19, 2018, 05:44:25 PM »
is it mainly on new growth or old ?

ive added epsom and iron to my citrus
and they greeneds up quite nicely.


Iron deficiency
starts on young terminal leaves and later works inward to the older leaves. However, deficiencies in manganese,
zinc or nitrogen develop on inner or older leaves first and then progress outward.
Symptoms include leaves turning yellow or brown in the margins between the veins which may remain green,
while young leaves may appear to be bleached

magnesium
Due to magnesium’s mobile nature, the plant will first break down chlorophyll in older leaves and transport the Mg to younger leaves
 Excess potassium, generally due to fertilizers, further aggravates the stress from magnesium deficiency,[2] as does aluminium toxicity.[3]
Interveinal chlorotic mottling or marbling of the older leaves which proceeds toward the younger leaves as the deficiency becomes more severe.

Manganese (Mn)
deficiency is a plant disorder that is often confused with, and occurs with, iron deficiency. Most common in poorly drained soils, also where organic matter levels are high. Manganese may be unavailable to plants where pH is high.


Nitrogen
It is a component of chlorophyll, so when nitrogen is insufficient, leaves will take on a yellow (chlorotic) appearance down the middle of the leaf.  Restricted growth of tops and roots and especially lateral shoots. Plants become spindly with gen eral chlorosis of entire plant to a light green and then a yellowing of older leaves which proceeds toward younger leaves



Coach62

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Re: Citrus leaf pic - iron deficiency?
« Reply #4 on: July 19, 2018, 05:48:54 PM »
Mainly on new growth.  My citrus has had a very hard year.  They were stressed by Irma, under water for over 2 weeks from the Irma flood, then heavily, and I mean heavily attacked by leaf miners this spring.

It's a wonder I have any citrus trees left. 
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greenman62

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Re: Citrus leaf pic - iron deficiency?
« Reply #5 on: July 20, 2018, 11:34:59 AM »
Mainly on new growth.  My citrus has had a very hard year.  They were stressed by Irma, under water for over 2 weeks from the Irma flood, then heavily, and I mean heavily attacked by leaf miners this spring.

It's a wonder I have any citrus trees left.

i lost a 25yr satsuma, delicious too.
we had a once in 100yr cold snap in New Orleans - 20F.
i was surprised, my meyers lemon came back, blood orange too.
now i am fighting Asian Psyllids and greening disease.
ive seen the Psyllids on my trees on new growth
i spray with oregano oil and alcohol+soap.

leaf miners are impossible to get rid of.
lots of flowering plants bring in predators that keep them at bay
but my neighbor has 5 large citrus he doesnt care for.

BTW... probably iron.
« Last Edit: July 20, 2018, 12:50:10 PM by greenman62 »

Coach62

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Re: Citrus leaf pic - iron deficiency?
« Reply #6 on: July 20, 2018, 12:20:19 PM »
This is the only thing I’ve found to be effective on the leaf miners so far. I just started using it a couple of months ago and it seems to be working. My main concerns are

1.  It’s systemic, but at least it’s a nicotine product. 
2.  It may kill bees too when in bloom. I plan on only using this AFTER spring bloom is done.

Lowe’s seems to have the best price on it.

https://www.lowes.com/pd/BAYER-ADVANCED-32-fl-oz-Fruit-Citrus-and-Vegetable-Insect-Control/3170999?cm_mmc=SCE_PLA-_-LawnGarden-_-OutdoorPesticide-_-3170999:BAYER_ADVANCED&CAWELAID=&kpid=3170999&CAGPSPN=pla&store_code=613&k_clickID=e025227f-3344-47c7-94ab-0870137fd417&gclid=EAIaIQobChMIhub04Imu3AIVhC-BCh0MVATUEAQYASABEgIVR_D_BwE
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Re: Citrus leaf pic - iron deficiency?
« Reply #7 on: July 20, 2018, 03:23:41 PM »
Leaf miners love the new flush of green

Time your oil spray as soon as new leaves start 

I cut damaged leaves off as soon as I see tunnels and dispose properly