How should tomato umbilical rot be prevented?
2023-09-09 10:08:38
Tomato is one of the main fruits and vegetables in daily life. Also known as tomatoes, because of its rich nutrition and unique flavor, it can be eaten raw, cooked, processed into ketchup. Therefore, it is widely planted throughout China. However, in the process of planting and production, umbilical rot is the most common physiological disease of tomato, which seriously affects the yield and quality of tomato, and also causes great economic losses.
How should tomato umbilical rot be prevented?
The main symptoms of umbilical rot are: water-stained dark green lesions on the top of the initial fruit, the color changes to dark brown in a short time, the flesh loses water, the top is flat, generally does not rot, when the humidity is high, the disease Some fungi are spoiled on the plaque, producing pink or dark brown mold. This disease is severe in tomato disease during the green period. The main cause of the disease is calcium deficiency. The absorption of calcium by tomatoes is hindered by excessive soil drying, excessive nitrogen fertilizer, excessive ground temperature or acidic soil. Or due to insufficient supply of calcium during fruit enlargement. The following measures can be taken to prevent and control: 1. Prevent soil moisture from being too dry or too wet. Apply appropriate amount of nitrogen fertilizer, add organic fertilizer, or apply calcium fertilizer. 2. At the beginning of the first fruit setting, spray 1% superphosphate, or 0.5% calcium chloride, or 0.1% calcium nitrate solution, spray once every 7~10 d, and spray 2~3 times.
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