Is dry stem rot fusarium on vandas?

[estación seca]

I suspect it wasn't watered at all at the store, which caused the damage. Bare-root or near bare-root Vandas need watering every day. Being so far from a window was also a problem.

At this point I would get the roots wet every day, begin fertilizing at every 5th watering with a tablespoon per gallon of any balanced fertilizer you might have, and hope for the best. That is a long time for a Vanda to go without water and survive.