This is my 3 year old, 7' tall unknown cultivar which was the root stock base for a graft from Thailand that died.. but the root stock ended up sprouting.. and becoming the fastest growing, most prolific species that I've ever seen. She typically grows between 18"-36" per year.
This year, however, some tips have sprouted and keep sprouting twisted, discolored and malformed leaves that keep coming. All tips show at least a fleck or two of discolor, but two tips are completely twisted up.
I've tried spraying with Azamax in hopes of it being pest related but no help.
What is this and how can I cure it?