What can you tell us about your wisteria, Ana? How long has it been in the ground? What type of fertilization or watering routine to you have? How much light does it receive? And, finally, a photo is always helpful.
It's dead now but thanks for your concern
Sorry to hear about your wisteria, Ana. Do you have any idea what happened?
I think the ants got to it. :( Only thing I can think of
I've never heard of that, but if you observed a lot of ants, perhaps they were an indicator of another problem.