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I have a japaneese acer tree 12 years old and have noticed this last few weeks it has developed a type of rust on the leaves and a white powder substance on the stem.Can anyone please tell me what this is,what is suddenly causing it and can i cure it.



Hi Dickvandyke: I googled your problem. It sounds like BOTRYTIS -grey mildew. If you go to, you'll find lots of info on Acers.

Hope you cure your tree, Acer are so lovely.

3 Jul, 2011

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