"Fittest" has some mould?

A quick update on "Fittest". I've noticed some white stuff at the crown and been trying to treat it with mild fungicide, looks like it's slowing spreading up to both trasp. I'm getting worried here. Anyone could give some advise, identify or tell me what I could treat "Fittest" with? It's my first VFT and I don't want it die soon yet.

"Fittest" at Day 63, some white stuff observed from the crown and towards both traps.
Trap has developed more and seems like there is also more dew in the trap.