The early stage of heartburn growth and development is less frequent, usually occurs when plants have 11 to 12 leaves, and the disease is mainly caused by calcium deficiency. Celery cultivated in summer is prone to heartburn. Control methods: Start with management, so that the temperature and humidity are suitable. Apply lime to the acidic soil and adjust it to be neutral. In the early stage of the disease, 0.5% calcium nitrate solution can be sprayed.
Hollow celery hollow is a physiological aging phenomenon that occurs in sandy loam vegetable fields, generally occurs in the late stage of plant growth. In addition, celery is also prone to hollowing during drought. Control methods: Non-sand soil cultivation should be selected, sufficient organic fertilizer should be applied before planting, timely dressing, and light green celery leaves and fertilizers can be sprayed with 0.1% urea solution 2~3 times.
Petiole cracking The disease is caused by the lack of boron in the soil or the retardation of plant growth under conditions of low temperature and drought. In addition, when the plants absorb water too much, sudden encounter with high temperature and high humidity will cause the tissues to be filled with water quickly, resulting in cracking of the petioles. Control methods: Apply sufficient organic fertilizer, apply 1 kg of borax per acre, and mix thoroughly with organic fertilizer; spray 0.1% 0.3% borax solution on the foliage, and pay attention to uniform watering during management.
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