Ok so I've got a willow about 5 ft tall very bushy I think it was called a
Kilmarnock when we bought it about 5 years ago. Problems though are these:-
some of the leaves on the under side are dusty with what looks like rust
powder, quite a lot are yellowing around the edges, curling up,drying out
and dying, but worst of all quite a few leaves have a lump about the size of
a pea between the upper and lower surface. What is going on? any ideas on
what to do will be welcomed along with any general pruning tips.
Thank you
Mike


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sounds like willow blister gall. have a look here for possible solutions

http://www.treehelp.com/trees/willow...andd-galls.asp