japanese maple

[jokey]

Hi all

can anyone tell me what this is on my Japanese maple, never seen this before and it doesn';t seem to have bloomed as well

help

jo

[jokey]

[Tee Gee]

Looks like scale insects to me;

http://thegardenersalmanac.co.uk/Data/Scale%20Insects/Scale%20Insects.htm

Click on picture to enlarge which shows a 'soft scale' type.

I think yours is a 'hard scale' type.

Do  a google this might give you more info!

[Palustris]

Definitely scale insects. Nasty sap sucking critters. You need a soap based insecticide (not Fairy liquid either). The soap dissolves the wax coating on the insects which makes them waterproof and impervious to normal insecticides. OR. You could paint them with Methylated spirits and brush them off. OR you could use a power spray and wash them off. Not too powerful a jet or you might damage the bark.

[jokey]

thanks for your replies

i will try all

jo :-\

[jokey]

hi all

i washed the scale off my japanese maple then sprayed it,  now i noticed scale on my young sycamore tree.  can anyone tell me what other plants/flowers its likely to appear on and has this transferred from my japanese maple

thanks

jo

[Bugloss2009]

scale insect infestations like yours are usually a sign that the tree is under some stress, I mean not growing under in the best conditions. I get them on my lemon tree, obviously a different type of scale insects

[Unwashed]

They infested my magnolia once.  I got them off with some meths on a bit of cotton wool - laborious, but safe - and they didn't come back.  I suspect they're quite specific about what they'll infest, though sycamore and maple are closely related so I don't doubt it's the same insect.

[jokey]

thanks all,

i will try and clean them off

jo

[Obelixx]

It looks like horse chestnut scale which can affect a variety of trees.  You can scrub off infestations now or wait till July when they hatch and spray with Provado Ultimate Bug Killer when the insects are young and susceptible.

There's more info here from the RHS - http://apps.rhs.org.uk/advicesearch/Profile.aspx?pid=650