Crown Gall Plant Pathology Crown Gall Crown gall was recently diagnosed on a euonymus samplesubmitted to the Plant Disease Clinic.
Crown gall is a bacterialdisease caused by Agrobacterium tumefaciens .
Crown gall can affectmany species including ornamental shrubs and vines, particularilyeuonymus, honeysuckle, and rose. Certain perennial flowers, suchas chrysanthemums, asters, and daisies, are also susceptible. Blackberry, raspberry, and tomato are hosts. Galls usually are restricted to the roots, lower stems, andlower branches of infected plants. In some cases crown gall mayoccur in the upper branches.