How to prevent garlic tip dry

The dryness of garlic tips is commonly caused by several factors, including root rot, leaf spot, and herbicide damage. The occurrence of tip drying varies depending on the growth stage of the plant. During the seedling stage in October and the regreening period in March of the following year, garlic plants are particularly prone to tip drying. In the early seedling stage, the dry tips are mainly due to physiological stress rather than disease. A key cause is excessively high temperatures, especially when using mulch film. The heat trapped under the film can scorch the garlic roots, limiting nutrient uptake and leading to insufficient nourishment in the leaves. This results in dry or even dead leaf tips. To prevent this, it's important not to sow too early in the fall and to remove the mulch film promptly when conditions allow. During the regreening phase in early spring, tip drying is often linked to root rot. Root rot is typically caused by bacterial infections that start from the root tips and spread upward, causing the primary and secondary roots to decay. Infected plants may emit a foul odor at the affected areas and are more susceptible to secondary pests and diseases. The leaves may turn yellow, become soft, and show rot along the veins starting from the tip. Affected plants often grow stunted and develop unevenly, with severe cases resulting in plant death. In many regions, large-scale tip drying in spring is associated with planting garlic after corn without proper soil disinfection. Over time, root rot pathogens accumulate in the soil, leading to serious root damage and dry leaf tips. To prevent this, it's essential to sterilize the soil before planting. In September, the soil should be exposed to sunlight for about a month prior to sowing. Deep plowing (at least 20 cm) is recommended, followed by soil rotation and treatment with lime, biological agents, or fungicides like carbendazim. Seed treatment can also help prevent root rot. A common method involves mixing 150 grams of Daning wettable powder with 8 kg of water per 100 kg of garlic seeds, then spraying and drying the seeds before planting. If root rot occurs during the growing season, it can be managed by applying 30 grams of bronchobacterin (20% thiazole copper suspension) mixed with 40–60 ml of water per acre, or using 30–60 grams of 50% chlorocyanil wettable powder mixed with 50 kg of water for foliar spray or root irrigation. Treatments should be repeated every five days for two to three applications. Severely infected or dead plants should be removed and disposed of outside the field to avoid spreading the disease. Author: Qi Liming

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