Young Avocado Tree (and older olive trees) Eaten by White Shell


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Hello Forum

Avotaco the second (that's his name) has sprouted on the 21st of August 2017. He is my biggest and nicest avocado tree and I love him dearly. Sadly some sort of white weird fungus shellish thing is eating it up. It has also been eating my olive trees (which I have a lot less love for) and it's been spreading over all my plants.

I have what you would call a black thumb. Its difficult for me to keep plants alive but i just cannot give up on avocato. Id really like to save all my babies. They went through a slight drough moment because i forgot to water them but I'm back on being good! Attached are pictures of the thing eating avotaco. Also if you can help on the leaves wiltering that's be great.
I just tried scrubbing them off with a toothbrush and diluted vinegar (with water 50/50) but im sure i must have missed some. They're literally everywhere.

Finally I leave in Egypt which is a zone 10 hardiness and I don't have access to a "local garden shop" which can give me any pesticide. If you know the chemical name that'd be a lot easier.


please help me save mah plants.
 

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Hello Forum

Avotaco the second (that's his name) has sprouted on the 21st of August 2017. He is my biggest and nicest avocado tree and I love him dearly. Sadly some sort of white weird fungus shellish thing is eating it up. It has also been eating my olive trees (which I have a lot less love for) and it's been spreading over all my plants.

I have what you would call a black thumb. Its difficult for me to keep plants alive but i just cannot give up on avocato. Id really like to save all my babies. They went through a slight drough moment because i forgot to water them but I'm back on being good! Attached are pictures of the thing eating avotaco. Also if you can help on the leaves wiltering that's be great.
I just tried scrubbing them off with a toothbrush and diluted vinegar (with water 50/50) but im sure i must have missed some. They're literally everywhere.

Finally I leave in Egypt which is a zone 10 hardiness and I don't have access to a "local garden shop" which can give me any pesticide. If you know the chemical name that'd be a lot easier.


please help me save mah plants.
Two things are happening. One, and probably the reason you have the second problem is that your tree is lacking in nitrogen, thus the yellowing leaves with yellow veins. This has weakened the tree so as to invite scale insects to infest the tree. Neem oil or dormant oil is what you want to kill the scale. You must make at least three applications once a week to kill them. They will not fall off of the plant quickly even though they are dead.
 
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Hello,

thank you so much for your swift reply. If I add the nitrogen in the ground, will it help fight off the scale ? Also should I put the neem oil directly, or rub it, or spray it ? I have also three other trees to do. Would spraying be enough or do i need to work it in with good old elbow grease ?

I just found a fertilizer which say 19-19-19 which stands for Nitrogen 19%, Phosphate 19 and Potassium 19%. Would that be recommended ?

I also found this product available could you please tell me if you'd recommend it along with the fertilizer ? https://egypt.souq.com/eg-en/g4-organic-insecticide-fungicide-5947400121/u/

Thank you again for your help
 
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Hello,

thank you so much for your swift reply. If I add the nitrogen in the ground, will it help fight off the scale ? Also should I put the neem oil directly, or rub it, or spray it ? I have also three other trees to do. Would spraying be enough or do i need to work it in with good old elbow grease ?

I just found a fertilizer which say 19-19-19 which stands for Nitrogen 19%, Phosphate 19 and Potassium 19%. Would that be recommended ?
Thank you again for your help
No, the fertilizer will not affect the scale now. If the tree hadn't been weakened from the lack of nitrogen the scale probably wouldn't have appeared. In Egypt I have no idea of what fertilizers you have. 19-19-19 is very high and not really what you want for avacados and olives but if that's all there is use it but only at a 1/2 rate three times per year until the tree regains its strength. Mix the neem oil 2 oz. per gallon of water and spray it once a week for 3 weeks on every surface of the tree. Both sides of the leaves, stems and trunk.
 
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No, the fertilizer will not affect the scale now. If the tree hadn't been weakened from the lack of nitrogen the scale probably wouldn't have appeared. In Egypt I have no idea of what fertilizers you have. 19-19-19 is very high and not really what you want for avacados and olives but if that's all there is use it but only at a 1/2 rate three times per year until the tree regains its strength. Mix the neem oil 2 oz. per gallon of water and spray it once a week for 3 weeks on every surface of the tree. Both sides of the leaves, stems and trunk.
Thank you so much for replying right now
I have attached a link with a fungicide I found too which seems to also be a spray on. The post is waiting to be moderated. Ill do as you said for the fertilizer. I also read somewhere that coffee grounds would be good to add nitrogen in the ground. Should I add those instead of getting a fertilizer ? Not add them if I get it ? add them along with the fertilizer ?

Also I just checked, I can't find any neem oil sold in Egypt

Thank you again <3
 
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Thank you so much for replying right now
I have attached a link with a fungicide I found too which seems to also be a spray on. The post is waiting to be moderated. Ill do as you said for the fertilizer. I also read somewhere that coffee grounds would be good to add nitrogen in the ground. Should I add those instead of getting a fertilizer ? Not add them if I get it ? add them along with the fertilizer ?

Thank you again <3
Don't EVER EVER buy products that are a dual or triple purpose. They do not perform as expected. You don't have a fungus. You have scale and shell excretions which have turned black. A fungicide is not what you need. Coffee grounds are great as a soil additive but they are not even close to fertilizer. By all means use both at the same time.
 
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Okay so the plan so far is:

Add fertilizer to the ground
Add Coffee Grounds to the ground.
Now... Since I don't have neem oil. Would the Fungicide/Pesticide work ? Or any other oil ?

Also I have read that submerging the plant 4h in water would kill anything on it. Should I try that ?

thank you <3
 
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Okay so the plan so far is:

Add fertilizer to the ground
Add Coffee Grounds to the ground.
Now... Since I don't have neem oil. Would the Fungicide/Pesticide work ? Or any other oil ?

Also I have read that submerging the plant 4h in water would kill anything on it. Should I try that ?

thank you <3
You have hard scale/armoured scale. Pesticides don't do much of anything to them and fungicides or worse than useless. They must be smothered, thus coating them in oil. You can also use horticultural oil, dormant oil or mineral oil. I've never tried drowning insects much less hard scale and I am not about to try.
 
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You have hard scale/armoured scale. Pesticides don't do much of anything to them and fungicides or worse than useless. They must be smothered, thus coating them in oil. You can also use horticultural oil, dormant oil or mineral oil. I've never tried drowning insects much less hard scale and I am not about to try.
Okay so no pesticide.

Would unscented baby oil be considered a mineral oil ? Also I saw some people do their own dormant oil by mixing canola oil and castille soap. Would you recommend that ? I'm so sorry for asking so many questions I just want to do this right once and for all.

Thank you <3
 
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And no fungicides. I cannot recommend mixing canola and castile soap as I have never heard of doing it. In fact I have never heard of Castile Soap. It may work, I just don't know but I know Neem and dormant oil does.. On thing about dormant oil. It will burn leaves if applied in the afternoon so always apply it early AM. Neem will too, but not as severe. If you want to do it right order neem online. Dormant oil, mineral oil, horticultural oil are meant to be used during a trees dormant period although you can use it at other times.
 
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And no fungicides. I cannot recommend mixing canola and castile soap as I have never heard of doing it. In fact I have never heard of Castile Soap. It may work, I just don't know but I know Neem and dormant oil does.. On thing about dormant oil. It will burn leaves if applied in the afternoon so always apply it early AM. Neem will too, but not as severe. If you want to do it right order neem online. Dormant oil, mineral oil, horticultural oil are meant to be used during a trees dormant period although you can use it at other times.
I will be trying the mixing of soap and oil as this is all I have right now. It seems to be exactly what you described from the research I made quickly. I just doused my plants with it as it's currently 3:46 AM so it'll have time to dry before the sun hits them. Since you said three applications a week I'll do them every other days
Ill update you on the state of the tree especially after I get the fertilizer Wish me luck
 
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Hey.

So I just checked on avotaco this morning and found those browning leaves on brand new ones. Do you know what is going on ??
185D5B45-7820-4E44-BFD3-918D0123E3B3.jpeg
 
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I can't be positive but it looks like it is staying too wet
Chuck you're a life saver.

While I was waiting for your answer and I checked online and I also saw that it could be the chlorine or hardiness of the water which caused this. Im letting it dry out over the next few days as we have a weather up to 33 degrees celcius these days
 
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Chuck you're a life saver.

While I was waiting for your answer and I checked online and I also saw that it could be the chlorine or hardiness of the water which caused this. Im letting it dry out over the next few days as we have a weather up to 33 degrees celcius these days
Hard water won't cause this but chlorine can. Also in the picture I see mottling of some leaves and one yellowing leaf with green veins. This is caused by a lack of iron. I don't know if you can get these products in Egypt or not but what you need for all of your trees is either liquid seaweed or Greensand as these two products are full of trace minerals, minerals that aren't available in chemical fertilizers. You would be much better off by fertilizing with composted manures and compost teas than by any chemical/oil based fertilizers.
 
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Hard water won't cause this but chlorine can. Also in the picture I see mottling of some leaves and one yellowing leaf with green veins. This is caused by a lack of iron. I don't know if you can get these products in Egypt or not but what you need for all of your trees is either liquid seaweed or Greensand as these two products are full of trace minerals, minerals that aren't available in chemical fertilizers. You would be much better off by fertilizing with composted manures and compost teas than by any chemical/oil based fertilizers.
Hi,

I will keep the composting advice in mind as to be honest I have no idea how to compost. I will add the liquid seaweed as you recommended and I am waiting for another fertilizer which is sadly chemical to arrive. It'll have to do until I can figure out how to compost.
I wonder how did my tree stay alive so long when I've been so out of clue. thankfully you're here to the rescue!

Thank you so much for your help and support <3

Edit: here is what is said about the fertilizer I got:
  • G6 Seaweed & Algae Plus additional shrimp and crab shell extract , 100% organic fertilizer .
  • 100% safe for soil , plants , human & eco-friendly .
  • It can be used for all types of plants , vegetables , fruit trees .
  • It is very effective in the flowering and fruit set stage of plants.
  • Increases the overall yield of plants .
  • Complete fertilizer which is rich in macronutrients , micronutrients , natural plant hormones .
  • Contains gibberellic acid which naturally stimulates plants growth and development .
  • Contains cytokinins which promotes cell division .
  • Contains abscisic acid which helps the plant in stressful conditions .
  • Contains indole butyric acid which enhances root formation.
  • Contains chitosan which increases green growth , root growth , enhances plant growth , boosts the defensive ability of plants against infections and pathogens .
  • High content of Phosphorus and Potassium .
  • It is a replacement for chemical fertilizers for flowering and fruit set stage .
  • It is a replacement for chemical fertilizers that regulates growth .
  • Start using it 30 days after germination , before 30 days use G1 Seaweed & Algae Organic Fertilizer.
  • Recommended to protect plants with G4 Organic Insecticide & Fungicide .
  • Can be used as foliar spray or irrigation through soil .
  • General application rate is 5ml per 1 Liter of water for foliar spray or soil irrigation once per week .
 
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Hi,

I will keep the composting advice in mind as to be honest I have no idea how to compost. I will add the liquid seaweed as you recommended and I am waiting for another fertilizer which is sadly chemical to arrive. It'll have to do until I can figure out how to compost.
I wonder how did my tree stay alive so long when I've been so out of clue. thankfully you're here to the rescue!

Thank you so much for your help and support <3
Unless you really mess up bad trees are very resilient and it takes a lot to actually kill them. Making a tree productive is the difficult part. Composting is easy. There is a lot of good info in the Organic section of this forum. Learn about making compost tea as it really works.
 
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Unless you really mess up bad trees are very resilient and it takes a lot to actually kill them. Making a tree productive is the difficult part. Composting is easy. There is a lot of good info in the Organic section of this forum. Learn about making compost tea as it really works.
Will look into tea compost. Thank you for your help.
 
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Quick update:

I have been spraying my plants with the dormant water but I’m still noticing some leaf curling and they turn crispy dry. Could sun exposures be the problem ?

I have also bought some nitrate and mixed it in water to put it on the plant. Should I also spray it ?

When should I see my leaves looking better ?

Finally I have been using the dormant water and scrubbing any scale I still find. Hopefully I’ll be done with them soon. I haven’t seen any new ones appear. My olive trees (or what’s left of them) seem a bit perkier.
Thank you ❤
 

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