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The initial diagnosis was celery soft rot. Celery soft rot, also known as "rotten gills," is a bacterial disease. It is generally susceptible to morbidity in the late growth period when the ridge is shaded and the ground is wet. The pathogens mainly in winter in the soil, invade from the wound through insects, rainwater or irrigation water, and may spread through rainwater or irrigation water after onset. Occurs mainly at the base of the petiole or on the stem. Usually start from the tender and juicy petiole base, the initial appearance of the first water immersion, the formation of light-brown spindle-shaped or irregular depression spots, followed by a wet rot, become black and odor, leaving only the epidermis. It is recommended to use agro streptomycin or neophytin for foliar spray control and calcium supplementation.