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Post by limehoundz on May 21, 2020 9:02:03 GMT -5
I have a new-ish dwarf limequat tree, that didn't arrive in the best condition and has only got worse. -First I thought it was citrus greening, because of the small bugs and the twisted and colour of the leaves, but you don't get that in this part of the world. -Then I thought that it was a nutrient deficiency so I gave it nutrients intended for citrus, with added Fe and Mg, but the tree is now flowering but still doing worse. -The leaves are turning brown and red. -The bugs are also getting worse and I can't identify them. Maybe they're doing well from the added nutrients. -There are also small, black 'pock marks' on some leaves. -I've also given it Confidor insecticide (imidacloprid) but it hasn't had any effect. Can anyone please help me identify the cause of any of these issues??    Thank you!!! |
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Post by david on May 21, 2020 11:08:39 GMT -5
Insect is not a Asian Psyllid. Can you post a good close up of it? It is evidently a varmit that I do not have here as I have not seen it. Looks like you have root problems. Have you repotted the tree since you got it?
My recommended treatment would be:
A. Pull the tree from its present soil environment.
B. Check roots to see that they are good healthy roots with some white new growth on them. Undo them if they are curled in the shape of the pot. Rinse roots in a good strong stream of water.
C. Repot tree using a good light soil.
D. Water good.
Speaking of water.....this tree needs to be watered till water runs from the weep holes in the pot. Only when the top two inches of soil are dry, water again.
Welcome to the forum. Hope this helps your tree. Lots of folks in here with lots of knowledge. The leaves look to be showing a manganese need. Lots of trees show this....but you have added some trace elements....so lets try some manganese.....you stated that you added iron and Mg....not sure but manganese is mn..atomic #25. Perhaps you meant you added Manganese....what part of the world are you in.....I did not see it on your profile?
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Post by Sylvain on May 22, 2020 5:18:03 GMT -5
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Post by millet on May 22, 2020 13:35:37 GMT -5
It is either a zine or manganese deficiency. If the leaves a dwarfed in comparison to other leaves of the same age then it is zinc, if they are normal size in comparison with other leaves it is manganese. The symptoms of a zinc deficiency is similar in appearance to a manganese deficiency except the leaves are dwarf.
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Post by Sylvain on May 23, 2020 5:39:53 GMT -5
The symptoms of a zinc deficiency is similar in appearance to a manganese deficiency In fact the clear part of the leaves are light green for Mn and yellow for Zn. |
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Post by millet on May 23, 2020 10:44:28 GMT -5
The way to tell the deference between a manganese deficiency and a zinc deficiency is by the size of the leaf.
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Post by limehoundz on May 23, 2020 11:01:29 GMT -5
Insect is not a Asian Psyllid. Can you post a good close up of it? It is evidently a varmit that I do not have here as I have not seen it. Looks like you have root problems. Have you repotted the tree since you got it? My recommended treatment would be: A. Pull the tree from its present soil environment. B. Check roots to see that they are good healthy roots with some white new growth on them. Undo them if they are curled in the shape of the pot. Rinse roots in a good strong stream of water. C. Repot tree using a good light soil. D. Water good. Speaking of water.....this tree needs to be watered till water runs from the weep holes in the pot. Only when the top two inches of soil are dry, water again. Welcome to the forum. Hope this helps your tree. Lots of folks in here with lots of knowledge. The leaves look to be showing a manganese need. Lots of trees show this....but you have added some trace elements....so lets try some manganese.....you stated that you added iron and Mg....not sure but manganese is mn..atomic #25. Perhaps you meant you added Manganese....what part of the world are you in.....I did not see it on your profile? Thanks david! I've tried to get a better pic but I have shaky hands and my phone camera isn't amazing. I repotted it when I got it around a month ago in a much larger pot so I don't think it's the root. I can see one or two white roots poking out the drainage hole in the bottom - at one point I wondered if the soil was too dense so jabbed lots of holes in it with a narrow stick and that did help its water uptake (which was draining out every time from even a very small amount). The soil is regular garden soil but I mixed it with small pieces and crushed basalt to loosen it a bit. I'm in Israel where it's currently super hot so I'm watering quite frequently. The fertiliser is NKP 9%:3%:3%, with trace elements iron 0.02% and magnesium 1.5%. It's beginning to grow lots of flower buds so I had presumed that maybe it was doing ok with nutrients and it was the insects, but I'll get hold of some manganese and see if that resolves the issue; others have also suggested that Mn deficiency may be the issue. The leaves and buds are beginning to fall quite easily though... |
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Post by limehoundz on May 23, 2020 11:03:40 GMT -5
It is either a zine or manganese deficiency. If the leaves a dwarfed in comparison to other leaves of the same age then it is zinc, if they are normal size in comparison with other leaves it is manganese. The symptoms of a zinc deficiency is similar in appearance to a manganese deficiency except the leaves are dwarf. Thanks millet, really helpful! The leaves are normal in size - but some are growing with a teardrop-shaped twist - so based on what you've said, as well as david's comment above, I'll go for Mn and see if that resolves it. Do you have any idea how long it should take for me to see an effect? |
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Post by millet on May 23, 2020 12:11:09 GMT -5
Rather quickly, perhaps in a week or two.
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Post by Sylvain on May 23, 2020 18:21:34 GMT -5
The way to tell the deference between a manganese deficiency and a zinc deficiency is by the size of the leaf. I didn't say you were wrong. I just said there is an other sign, the color.  |
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Post by ilya11 on May 24, 2020 3:43:57 GMT -5
I think this is a more complex deficiency, probably also zinc and manganese, could be due to disbalance of potassium or an excess in acidity.
When magnesium deficiency reaches such necrotic stage the leaf tips and upper veins are completely discolored.
I would recommend to wash the substrate and apply a microelement leaf spray.
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