Acer fungus

Posts

• Arthur1 Posts: 542

  August 2022

  It looks like a sticky wet liquid. Is there any wound or bark damage that this liquid is oozing from? Some trees can get a bacterial infection and exude a bacterial ooze. Never seen it black before. 
  Is the tree otherwise healthy?
  Could someone have poured something on it?

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• Pete.8 Posts: 11,340

  August 2022

  I agree that is what it looks like.
  It's sap that has oozed out for whatever reason then sooty mould has turned it black.
  I'm afraid I have no idea what the cause may be though.

  
  Billericay - Essex
  
  Knowledge is knowing that a tomato is a fruit.
  Wisdom is not putting it in a fruit salad.

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• Dovefromabove Posts: 88,147

  August 2022

  Anyone been near it with a strimmer? 

  
  Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
  
  
  
  
  
  

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• Arthur1 Posts: 542

  August 2022

  Oozing sap is due to damage or stress. Only thing I can suggest is keep it as happy as possible - plenty of advice on line about looking after garden trees. Fertilizer will not help, though an organic mulch might.

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• Plantminded Posts: 3,580

  August 2022 edited August 2022

  Are there any other symptoms like wilting, yellowing leaves or blackened/dying branches?  If so, there's the possibility that it may be root rot caused by phytophthora: Phytophthora root rot / RHS Gardening
  
   

  Wirral. Sandy, free draining soil.
  
  
  

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• bcpathome Posts: 1,313

  August 2022

  I would clear all the vegetation from around it and get a good look at it .See where it starts e.g. does the black stuff go or come from below the soil level .
  If the rest of the tree looks ok I would then assume that it’s not that bad ………yet .
  Then consult the books and try to discover what it might be .

  My acers have never had anything like that before .Sorry I can’t be any more helpful .

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