That fugaku has amazing colours!! I hope mine gets back to its glory one day... Since the roots of the healthy offshoot weren't as developed as I thought, I had to pluck off all leaves with a bad part in it... this included the growing tips of the two other growths
.... Then I made my own +/- 21,4% copper sulphate solution and sprayed it down completely... lets hope this has eliminated the infection and can keep the plant healthy until the growing season kick starts everything again...
friendly greetings,
Dries