Definitions:

1. Bacteria producing yellow non-water-soluble pigments. NOUN
   • The characteristic yellow lesions on the leaves indicated an infection by xanthomonad bacteria.
2. Refers to any bacterium belonging to the genus Xanthomonas, known for causing plant diseases and are characterized by their yellow-pigmented colonies due to the production of a pigment called xanthomonadin. NOUN
   • The xanthomonad bacteria were found to be the cause of the leaf blight affecting the rice fields.

Synonyms:

• phytopathogen
• plant pathogen
• xanthomonas