Tree disease identification help

[Bill HH]

Can anyone tell me what these red lumps are on this sycamore? I know this is a bonsai but its 100foot mother gets the same problem. They are quite raised and hard. The plant seems to live with them every year and it doesn't affect its health but they are disfiguring.

[shellyanne1987]

Are they not eggs from a bug of some kind I remember something looking like this from being a kid


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[Bill HH]

I thought that but the are vegatitive (is that a word?) they wont rub off and never hatch or change. More of a fungus I think.

[Scarlet]

Are they gall mites?
http://www.woodlands.co.uk/blog/tree...tion/sycamore/

[bearded bloke]

What Scarlet said Bill

[veggiechicken]

Are you hoping its

a) terminal;
b) dangerous;
c) threatening other species;
d) any thing else to cause its demise.................

[Scarlet]

I'm sure he is

[Bill HH]

Yes it looks like its gall mites

VC I am hoping its terminal in the mother tree but not on the bonsai

The next question is how do I get rid of it on the bonsai. Pick the affected leaves off would be a start I spose.

[bearded bloke]

Gall mite
Q
Are sycamore galls worth
worrying about?
A
No. This tiny mite (Eriophyes macrorhynchus) affects sycamores and hedgerow maples, producing
masses of tiny pinhead-sized raised areas. These can be reddish or yellow, and occur from spring
until leaf fall. There is no chemical control. However,picking off and burning, burying or binning affected leaves may limit attacks the following year

Taken from .... http://www.which.co.uk/documents/pdf...ems-153613.pdf

[Nicos]

I suppose you need to make sure you burn all the fallen leaves in the Autumn????

..not sure if composting them might do it though????

[Bill HH]

All I can say is it galls me to have them on my bonsai.

[Scarlet]

My conker tree has the leaf mining moth that makes the leaves brown in August. I try to pick up as much of the leaves as possible and burn them - believe me it's a huge job! We did see a huge improvement on the leaves the following year. I've also read that you can collect, bag up and seal and not open them for a year - this may work for you, if you break the cycle and reduce the numbers it all helps.