New celery disease appears in California

Abstract

A bacterial disease of celery, caused by Pseudomonas syringae pv. apii, has been identified for the first time in California. Bacterial blight develops on greenhouse-grown transplants and has spread into production fields throughout coastal regions of the state. Although this disease can be confused with fungal celery blights caused by Septoria apiicola and Cercospora apii, it has several distinguishing characteristics.