Fungus on a Linden

Hi Guys,
i found this fungus on a Group of linden. The tree was potted this year in fresh drainable soil from muddy black stuff which smelled horroable anaerobic. On tree was already weak and show the fungus the first. He will most probably die. Healthier neighbours are effected to , what can I do to treat this fungus?
Thorsten

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Wow… I would be seriously concerned If this were on my lindens… I am NOT surprised no one has offered info.
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If this helps…
You separated the creature from the ‘muddy black stuff which smelled horroable anaerobic’ and he climbed up your trees…
Looks like a slime mold, fungus. Maybe a mixed bacterial colony.
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I WOULD… (isolate the tree), put on a mask and rubber surgical gloves, gently scrape and shovel everything you can see and get to (including infected surface moss and soil) into a baggie and (including mask and gloves) toss or BURN. This gets rid of the spore forming part. Alcohol wipe ALL tools. (Maybe flame sterilize, If you know how to do this lab technique.)
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Replace NEW soil. Not the moss. Remove any organic fertilizer.
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Sunlight and oxygen might do the trick, Balance.
Moderate sun. Moderate moisture. I tend to be patient. Do the least harm. The tree’s health is paramount. Watch the leaves. Do NOT give up on the trees if they lose all the leaves. Fall sulfer spray. Next springs buds have already formed.
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Then I WOULD break out the Nuclear option… Research what lindens will tolerate, rem: your spraying the roots/soil. Atifungal of some kind. Dacanil, Myconozeb, chlorothalinil, maybe a captan (sulfer compound). Copper might work, it would also kill the moss. Dilute solution, follow directions. (Use a drop of dish soap, it breaks up the hydrophobic nature of the fungal mycelium so it will wet and absorbe the solution…)Then, if it continues to spread, use a dilute antibacterial spray of some kind. NOT a systemic. I WOULD be tempted to alternate weekley for a month. Light applications.
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Hoping the trees survive, next spring, I WOULD reinnoculate the soil with a mycohrizal mix, Dr. Earth or similar. Light ORGANIC fertilizer.
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I really like my lindens. Right now, I am treating a moderate black leaf spot disease. Doesn’t want to go away. Not killing the trees, though. Will use sulfer in late fall and spring before leaf out. Might be a viral spot though…
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Hope this helps. Good luck. Let us know. Watch your other trees.
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Full disclosure: BS Biochemistry; 40 years of bonsai. I have used all of the above at one time or another to successful outcomes. Sometimes, not so much. Stuff happens.
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If someone else has more specific info, PLEASE feel free to help.

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