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Aucuba black leaves

turmericturmeric Posts: 828
in Plants
I've noticed two Aucuba japonica "Crotonifolia' in two separate gardens with completely black leaves that have wilted.  This happened before this recent heatwave and one is in partial shade and kept watered so it isn't the heat.  The rest of the plant seems fine but some entire branches have blackened and died back.  I also noticed a few leaves on an A. japonica 'Dentata' too which I hadn't seen before.  Any ideas what is causing it?  Many thanks.

Posts

  • B3B3 Posts: 27,015
    edited June 2018
    I had that on mine last year and googled it. Apparently, it's not fatal. You cut out the affected branches. I've been getting rid if my acuba, but the ones that have escaped the fork are fine this year.
    In London. Keen but lazy.
  • turmericturmeric Posts: 828
    Did you find out what it was when you googled it? I can't find anything.  It looks like a fungus but I would have thought I'd find something on google as it seems to be a common problem.
  • B3B3 Posts: 27,015
    Yes but I can't remember. I'll have a look
    In London. Keen but lazy.
  • B3B3 Posts: 27,015
    https://www.rhs.org.uk/advice/profile?PID=314
    That's the rhs one but there's loads of others.
    Just Google black acuba leaves
    In London. Keen but lazy.
  • turmericturmeric Posts: 828
    Not sure why I didn't find that!  I must have used the wrong wording in google.  Thanks B3 that's really helpful and reassuring that it's not terminal.  I'm a bit worried about the Dentata though as it was a baby and newly potted up and a couple of the leaves went brown over a few days last week so it wasn't caused by a cold, wet winter.  
  • B3B3 Posts: 27,015
    I can't help you with that one. Put it on a new thread and someone will be able to help you
    In London. Keen but lazy.
  • turmericturmeric Posts: 828
    Thanks B3.
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