Japanese Pistachio with Verticillium Wilt: No Cure, Potassium May Help

7-year-old Japanese pistachio in Albuquerque has had Verticillium wilt two years running—yellow, curling, dropping leaves in June–July. Spring growth good.

Reality

No cure for vascular wilt. Potassium deficiency worsens it; try 0-0-60 at 1 lb around drip line.

Prognosis

• If decline continues yearly, tree unlikely to survive.
• Don't replant near it—pathogen persists in soil.

Consider resistant species for replacement.