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Does anyone know what this little critter might be?
I have found a couple of these on my cotonester (sorry prob wrong spelling, maybe wrong plant even...)
Anyway it seems to be killing off the leaves. any ideas what it might be?

I think it looks like a leech type thing, but not aware we get leeches in the UK...
thank you.
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Don't know what your thing is though.
Think its the larva of the Pear Slug Sawfly
http://en.wikipedia.org/wiki/Pear_slug
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
Thank you Dove, a friend has just said the same. Friend of Foe do you know?
Ever have the feeling you are battling things eating your plants and plant diseases...
Don't know any sawflies that have purely friendly intentions, but I tend to regard them as food for the birds rather than worry about them
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
I had slug worms on my cherry tree last year, peanuts, not loads though. They did the same sort of damage but it is fine this year.
These are 'Pear Slugs' which are the larvae of the Sawfly and are defo a foe! Get rid before they destroy your trees! I have tried the friendly way of blasting them off with water but they come back so insecticide it is.