A Foliar Disease of Fittonia verschaffeltii Caused by a Pathovar of Xanthomonas campestris

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Abstract
A foliar disease of Fittonia verschaffeltii (nerve plant) has been observed in several central Florida nurseries. A pathovar of Xanthomonas campestris caused veinal necrosis on fully expanded leaves of all cultivars and marginal necrosis on some plants. Strains of this pathovar from F. verschaffeltii infected Aphelandra squarrosa, Crossandra infundibuliformis, Stenandrium lindenii, Xantheranthemum igneum, Pachystachys lutea, and Ruellia brittoniana (members of the Acanthaceae). The bacterium had a wide host range and caused symptoms similar to those caused by xanthomonads found on plants in eight other families.