Celery plants are showing signs of distress, starting with the new leaves. These leaves appear burnt and deformed, with irregular chlorosis between the veins and a rough texture on the stems. As the condition progresses, the leaves become thick, brittle, and prone to cracking. The inner heart of the plant also shows signs of burning. In greenhouse conditions, the heart leaves often develop wet rot, and the growing tip may die off. When the plants are pulled up, the roots are short, underdeveloped, and the root tips turn brown and die. Despite using various bactericidal agents, no improvement was observed. This condition is caused by a lack of boron.
After consulting with agricultural experts, it was confirmed that the symptoms were due to boron deficiency. Spraying the plants with boron fertilizer significantly improved their condition. Here are some effective prevention methods:
Celery is highly sensitive to boron, so it's important to apply it properly. There are two main methods: soaking the seeds in boron solution before planting, or applying boron as a base fertilizer. Foliar spraying is also an effective approach to prevent boron deficiency.
As a base fertilizer, 0.3 to 0.5 kg of boron per acre should be applied. It can be mixed with organic compost or NPK fertilizer. However, care must be taken to avoid direct contact with seeds or young roots, as this can cause seed rot or seedling death.
For foliar application, if boron deficiency symptoms are observed in the field, spray the leaves immediately with a 0.1% boron solution. Apply 40 kg of the solution per mu (approximately 667 square meters), and repeat the process every 5-7 days for a total of three sprays. It's best to spray in the late afternoon when the leaves are moist but not dripping. This ensures maximum absorption and effectiveness.
By following these practices, farmers can effectively manage and prevent boron deficiency in celery crops, leading to healthier growth and better yields.
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