Oleander (Nerium oleander)

"Witches'-Broom" Disease

Caused by fungal organism, Sphaeropsis
tumefaciens.

Oleanders are very susceptible to this fungal infection.  The privacy hedge below is dying.  There
is no preventative or curative treatment. Clean and sanitize pruning equipment before pruning
asymptomatic oleanders, and after pruning those that are infected. Other highly susceptible plants that are easily infected through contaminated pruning tools are:

  • Hollies (including native Dahoon Holly)
  • Bottlebrush Trees
  • Citrus
  • Southern Wax Myrtle

Oleander infected with Witches' Broom Disease

Oleander with witches' Broom DiseaseClose up of a "witches'-broom" on this dying privacy hedge. A proliferation of shoots emerges from small galls that developed at a pruning point.

More information at: http://mrec.ifas.ufl.edu/jos/Sphaeropsis.htm