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Celery Foliar Blight

Foliar blight of celery is caused by two fungi, Septoria and Cercospora. The early blight is caused by Cercospora and late blight is caused by Septoria. Small circular or angular spot appeared at first and extensive damage occurs once the diseases progress. Small, black, and round fruit bodies appear once the symptom advanced. High humid or wet period due to rain, dew, fog or sprinkler irrigation above 15°C temperature favors the disease epidemics. The disease is seed-borne and contaminated celery seed is the primary source of inoculum for late blight. Both early and late blight pathogens survive in the previous year’s crop residues.

Early Foliar Blight
Source: OMAFRA

Late Foliar Blight
Source: OMAFRA

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