Symptoms and prevention of boron deficiency in Celery
Celery plants are showing signs of distress, with the new leaves appearing burned and dying first. These symptoms include leaf deformation, irregular chlorosis between the veins, and the formation of burs on the stems. As the condition progresses, the leaves become thick, brittle, and the stems crack, leading to a burnt heart. In greenhouse conditions, the inner leaves often develop wet rot, and the growing tip may die off. After pulling up the plants, the roots appear short and thick, underdeveloped, with the root tips turning brown and dying. Despite using various bactericidal agents, no improvement was observed, which led to further investigation.
After consulting with agricultural experts, it was determined that the issue was due to a severe boron deficiency. Once boron fertilizer was applied, the results were immediately noticeable. To prevent such issues in the future, several effective prevention methods have been recommended.
Celery is highly sensitive to boron, so it's important to apply it through either soaking, as a base fertilizer, or through foliar spraying. Each method has its own advantages and should be used depending on the situation.
As a base fertilizer, 0.3 to 0.5 kg of boron fertilizer per acre is recommended. It can be mixed with organic compost or NPK fertilizer. However, care must be taken to avoid direct contact with seeds or young seedlings, as this could lead to seed rot or plant death.
For foliar application, if boron deficiency symptoms are observed in the field, it's best to spray the leaves immediately with a 0.1% boron solution. Apply 40 kg per mu (approximately 667 square meters) and repeat the treatment every 5 to 7 days for a total of three sprays. The best time for spraying is in the late afternoon when the leaves are moist but not dripping. This allows the plants to absorb the nutrients effectively without waste. By following these practices, farmers can significantly reduce the risk of boron deficiency and ensure healthier celery crops.
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