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Control Measures for Hollow and Cracked Celery Petioles

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During the growing period of celery (Apium graveolens), especially in the middle and late stages, white spots, hollow cavities, or transverse and longitudinal cracks often appear on the cross-section of the petioles. The causes and solutions are as follows. Boron deficiency in the soil. This is the main cause of petiole cracking. Apply 0.5-1 kg of borax per mu as a base fertilizer. Once slight petiole cracking is found, spray the leaves with a 0.2%-0.5% borax aqueous solution, or drench the roots with a 0.25% borax aqueous solution. Improper sowing time or insufficient nitrogen fertilizer. For open-field autumn planting, sowing too late, combined with insufficient nitrogen fertilizer, causes the plants

During the growing period of celery (Apium graveolens), especially in the middle and late stages, white spots, hollow cavities, or transverse and longitudinal cracks often appear on the cross-section of the petioles. The causes and solutions are as follows.

Boron deficiency in the soil. This is the main cause of petiole cracking. Apply 0.5-1 kg of borax per mu as a base fertilizer. Once slight petiole cracking is found, spray the leaves with a 0.2%-0.5% borax aqueous solution, or drench the roots with a 0.25% borax aqueous solution.

Improper sowing time or insufficient nitrogen fertilizer. For open-field autumn planting, sowing too late, combined with insufficient nitrogen fertilizer, leads to poor plant growth. During the harvest season, the plants fail to reach the harvest standard, and under delayed harvesting, they are susceptible to low temperatures and cold waves, the petioles soften, and the hollowing phenomenon worsens. Therefore, each region should determine the appropriate sowing time according to local climatic conditions and cultivation facilities, and strengthen fertilizer and water management in the early and middle growth stages to provide sufficient nitrogen fertilizer.

Plants damaged by freezing. Celery (Apium graveolens) is not tolerant of severe cold. When the temperature is 0°C or below, freezing symptoms are likely to appear. When plants are severely frozen, the tissue structure of the petioles is destroyed. After the temperature rises, the tissue cannot recover, the intercellular spaces enlarge, and hollowing occurs. Therefore, during cultivation, freezing should be prevented by adopting insulation measures and avoiding overwintering in open fields.

Variety degeneration. Celery (Apium graveolens) readily cross-pollinates naturally with common celery, so when saving seeds, celery must be strictly isolated from other celery varieties. At the same time, in seed production, the selection of hollow plants for seed saving should be prevented, so as to avoid an increase in the proportion of hollow plants.

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