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What Is This?

For the last few months i've had some kind of yellow stuff on one of the tree's in my back garden. What is it?



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Looks like sap from your tree affected by a bacterial canker. Is it a fruit tree? To be honest I looked this up in a book I have about trees - I have no experience of it. In the book the weeping of the sap looked exactly like your blobs and the diagnosis of the tree photographed with the blobs listed it as bacterial canker. Sure somebody else will come up with something for informative and accurate.
There is a thing called 'gummosis' which is when a tree produces these resin oozings in response to Bacterial canker. There is very little one can do if that is the case.
No its not a fuit tree, Well its never had fruit on it as log as i've lived here since 2007.so what is Bacterial canker and if it is that is the tree doomed.
I have had a similar substance on my conifers which started like blobs of orange jelly and then turned into black thickened branches. Is this bacterial canker? I have removed approximately 70% of the tree, focusing on the blackened areas... will this help?