white powder

there is another maple tree with white powder under bark ,there is any remedy for the white powdery substance! thank you

 

It could possibly be a woolly aphid? It's hard to be sure without a closer pic :)

Did you lift the bark to find the white substance? Or did it break away of its own accord?

 

hi yes when i removed the bark it was there, i took closer picture let me know if it is okay. thank you!

 

Google suggests maybe bark lice? I may be way off here though, but the white substance links to the webbing the live weave: http://www.ag.auburn.edu/enpl/bulletins/barklice/barklice.htm

It seems quite common on maple? If it is this, you need not worry. But I will keep looking.

 

This is inquiring of the close up picture of the white powder of the japanese maple.

 

That's fairly extensive decay you have there. Whether it will harm the tree or not, hard to say. If it is just confined to the heartwood (which is dead anyway) it won't hurt, but if it also affects the live sapwood, then the tree is on the way out.

 

In other words the white stuff is a fungal growth.

 

is there any remedy for this? Can the tree be saved if it is under any harm at all?

 

copper solution every week for two months,but this maple have 20%of remain in life