By Dian89
Shropshire,
United Kingdom 
Hi all, does anyone know what is affecting the leaves on my Bonsai Oak tree. Many thanks.
25 Jul, 2013
Answers
are there flat discs underneath that look like light brown sequins? if yes it is spangles [an old name for sequins] a gall response to an insect damage.
lokk for aphids feeding or some other insect.
25 Jul, 2013
If it was a big oak tree I,d say rust, try googling it and see if it looks similar
25 Jul, 2013