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Corkscrew Hazel

Hi. Today I found lumps on my Corkscrew Hazel branches.  They are about 2mm long and 1mm ish wide and tall.  They are clumped together and a shiny brown colour.  The branches are pretty much covered and if you rub them off there is a white powdery residue left.  Has anyone any ideas on what it might be?  

The tree is about 5 years old and seems healthy enough at the moment.


  • BobTheGardenerBobTheGardener Posts: 11,391

    Hi Sarah, they are scale insects, probably Hazel scale.  You can rub them off.  The white residue are eggs which are about to hatch at this time.  The young larvae then distribute themselves all over the tree, so try and make sure you rub them all off now.  More here from the RHS:


    A trowel in the hand is worth a thousand lost under a bush.
  • Thanks BobTheGardner, I followed your link and the picture of Brown Scale looks almost identical to my 'lumpy bark' and it secretes honeydew as well (hence the bees interest).  I'll have a go at rubbing off as many as I can (it is quite badly infested) but will spray with insectocide as well to see if I can get it under control quickly. Many thanks again.

  • HI, I have just moved into a new house and inherited a corkscrew hazel with extremely curled leaves.  Is this normal or does the tree have an infestation?

    Thanks Fran

  • DovefromaboveDovefromabove Posts: 83,720

    The curly gene does't just make the stems curl, it makes the leaves curl too  - perfectly normal for a corkscrew hazel image

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

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