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Is this Nutrient burn, Fungus or what?
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Posted by jasoncoco (My Page) on Thu, Sep 24, 09 at 20:16
| Is this a nutrient burn or a fungus? I looked at the dead leaves up close and they have some kind of fungus or mold. Im not sure if it happened after the leaves died or is killing the leaves. Thanks, Jason.
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Follow-Up Postings:
RE: Is this Nutrient burn, Fungus or what?
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- Posted by jean001 z8aPortland, OR (My Page) on
Thu, Sep 24, 09 at 23:09
| Looks like they dried out. |
RE: Is this Nutrient burn, Fungus or what?
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| That's the correct answer. Dax |
RE: Is this Nutrient burn, Fungus or what?
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| The correct answer is they dried out? I dont think that is it because i have kept them watered and we have had pretty good rain lately. Thanks, Jason. |
RE: Is this Nutrient burn, Fungus or what?
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| It is just as likely that the problem is an excess of water, especially if you are not using a very fast draining potting medium. The symptoms - dried tips, crisp edges or wilted, dried foliage - can be very similar for too much water as well as not enough. I don't see any obvious evidence of fungal issues and the Osmocote or similar CRF should not create an excess nutrient situation that would result in burn. I too believe it to be a watering issue. |
RE: Is this Nutrient burn, Fungus or what?
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| ok too much water i can see, as we have had somewhat of good rain lately. The medium does drain relative quick. It is about 30-35 percent pine bark fines. The rest is a mix between leaf compost and soil from the yard. I took some of the fertilizer out because i thought that was the problem. Do some of the leaves look like they might have chlorosis to any one? I think i should put some of them out of the rain to see if it helps. Thanks for your input everyone. |
RE: Is this Nutrient burn, Fungus or what?
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| Soil from the garden is NEVER a good idea as an ingredient for a potting soil - the pore size is too small and it just does not provide sufficient aeration. And leaf compost, or any compost for that matter, continues to breakdown and degrade and that also contributes to a lack of pore space. With insufficient pore space, drainage is compromised. There is no chlorosis visible, just water stress. I'd look into repotting these little guys soon, into a better quality soil. There have been several discussions on an appropriate soil mix for containerized maples. I think I referenced one recently on the 'Crimson Queen' bargain found at HD thread. |
RE: Is this Nutrient burn, Fungus or what?
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Hi Jason,
Did you use a foliar spray? It looks like ferlizer burn. The barks fines are ok but you should add one part peat and 1 part perlite with 5 parts bark fines. I switched to this formula from the container grown forum and my plants have put on major new growth this year because of it. The garden soil will make the mix to compact (not enough oxygen in the mix). Try repotting with a new mix and your right some of the foliage looks as if it has iron chlorosis. Try new potting soil that will give your plants the biggest boost. |
RE: Is this Nutrient burn, Fungus or what?
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| No i have not used any foliar spray. The only reason i used soil from the yard is because i didn't want to have to water every day or two. I just wanted to be able to only water once a week if there is no rain. I guess you have to learn from your mistakes. Thanks everyone. |
RE: Is this Nutrient burn, Fungus or what?
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| Try taking a couple of the worst plants out of their containers and look at the roots. Break apart the soil if you have to. Then look at the root system of a plant whose top is healthy. If you are overwatering, which I think is correct, you should be able to see mushy, decayed roots and a poorly branched system on the sick plants. Moving them all into a better soil mix is a good idea. |
RE: Is this Nutrient burn, Fungus or what?
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| Alright i repotted all into a better draining mix. It puzzles me because most of the roots look very healthy compared to the tops. If the top was damaged from over watering, you would think the roots would be damaged too. That was not the case for most of them. Jason. |
RE: Is this Nutrient burn, Fungus or what?
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- Posted by tapla z5b-6a MI (My Page) on
Thu, Nov 12, 09 at 22:37
| ......... might as well add my vote for 'over-watering', but I will add that there are 3 possible causes that will cause what is, in the end, the drought response you're almost certainly seeing. 1) A high level of solubles in the soil solution can make it so difficult for the plant to take up water (think of how salt pulls moisture out of ham or bacon & you have the concept) that it cannot replace what's lost by the canopy through respiration - enter burned tips/margins of foliage. 2) Under-watering can simply make water unavailable. 3) Over-watering can interfere with root metabolism, function - the ability to take up water, so plants can die of thirst in a sea of plenty. In order of likelihood: I would rate over-watering first, followed by too high a level of TDS/EC (salts) in the soil solution, followed by under-watering. By the looks of all that fertilizer on the soil, there's probably little chance it could be attributed to a nutritional deficiency, unless it's an antagonistic deficiency caused by too much of one element or an imbalance of antagonistic elements, and because it appears that only leaf tips and margins are involved, the likelihood of something fungal is also diminished. Al |
RE: Is this Nutrient burn, Fungus or what?
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- Posted by botann z8 SEof Seattle (My Page) on
Fri, Nov 13, 09 at 9:26
| My vote is for too much fertilizer. If it was over watering all the trees would be affected almost equally because they are in a tray. They would have to be in standing water to look bad. The only variable is fertilizer. Some are burned, some not. It's easy to over fertilize a four inch pot. Correct measurements are critical. |
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