I have several queen palms affected by fusarium wilt. I am considering replacing them with king palms. Are king palms also susceptible to this wilt?
Manatee County Florida
First, I want to make sure you have a lab-verified diagnosis of Fusarium wilt, otherwise, a diagnosis based on symptoms alone may not be enough to indicate preventive management of disease for whatever you replant with. If you are sure it was Fusarium wilt, King palms are not specifically mentioned in the publications about the two Fusarium wilts. However, I would recommend not planting any kind of Phoenix, Syagrus, or Washingtonia palms or closely related species of palm to those mentioned in these two publications: https://edis.ifas.ufl.edu/pp278 and http://edis.ifas.ufl.edu/pp139. Fusarium can live in the soil for years, and although we know the fungus can infect the three genera noted above, we are not sure of the extent of the host list. UF has just hired a palm mycologist, so I hope we have more information on these diseases in the future.