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White blobs with cap on stems

Hello again, our bay tree and some neighbouring red and black currents have developed clusters of what look like white blobs with little lids or caps all over the trunk and some stems. What could it be, should it be treated and how without resorting to anything harsh which could affect wildlife. Many thanks j

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  • Some photos might help! Thank you 
  • Pete.8Pete.8 Posts: 11,340
    They are scale insects and the larvae are hatching from under the shell.
    If you can brush them off with a stiff brush, that should get rid of them - but don't hang about the larvae will be on the move any time

    Billericay - Essex

    Knowledge is knowing that a tomato is a fruit.
    Wisdom is not putting it in a fruit salad.
  • punkdocpunkdoc Posts: 15,039
    Scale insect.

    Either dab with alcohol, or scrape off.
    How can you lie there and think of England
    When you don't even know who's in the team

    S.Yorkshire/Derbyshire border
  • Thank you @Pete.8 and @punkdoc I’ll get stuck in now! 👍
  • LynLyn Posts: 23,190
    If you have any methylated spirit you can paint that on. 

    Gardening on the wild, windy west side of Dartmoor. 

  • LynLyn Posts: 23,190
    If you just scrape them off, won’t they come back again?
    They'll be laying in the soil. 
    Gardening on the wild, windy west side of Dartmoor. 

  • Pete.8Pete.8 Posts: 11,340
    I had them on a big acer one year and I used an old shoe brush to shift them and haven't returned.

    Every few years I find some on the stems of my blueberries - sneaky, as they look like dormant buds - I flick them off with a fingernail.

    I had a star jasmine that would get it in hot summers when I didn't water enough. I'd leave them as it was too big to treat. They didn't usually appear again the following year as long as I remembered to water

    Billericay - Essex

    Knowledge is knowing that a tomato is a fruit.
    Wisdom is not putting it in a fruit salad.
  • thank you @Pete.8 and @Lyn I have just been out to rub them off the bay tree and red current, pretty sticky stuff! Poor bay tree really had been suffering though thankful only a few on red currrnts,so far haven’t found them on anything else so fingers crossed. Thanks again  :)
  • BusylizBusyliz Posts: 149
    They are all over my viburnum dawn. Never had them before.
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