Tomatoes are common solanaceous vegetables, but when vegetables can also be used as fruits, they are very popular in summer, especially for cold tomatoes, which are very appetizing. As a common vegetable, there are many people who grow it, but if you want to grow tomatoes, some common diseases should be prevented in advance, and the specific methods of prevention and treatment of various diseases should be discussed together.
1, tomato umbilical rot
Umbilical rot is more common in tomato cultivation. It is generally considered to be abnormal water supply, and there is a lack of calcium and boron to cause rot around the umbilicus. Prevention of tomato umbilical rot, mainly in the young fruit stage spray foliar fertilizer to prevent. You can use 1% superphosphate, and boron fertilizer, spray once every two weeks, even spray 2-3 times, can have a good preventive effect; tomato leaf surface calcium, from seedling to harvest It can be used before, usually every 10-15 days, the effect is good.
2, tomato malformation
When the tomatoes are deformed, the quality of the fruit will be reduced or the value of the product will be completely lost. The damage is very serious. If the temperature is poorly managed in the seedling stage of the tomato, or if the hormone is used improperly, it may cause the fruit to be deformed or cracked. In order to promote fruit enlargement, some growers use swelling agents to make tomatoes appear hollow. In order to prevent tomato malformation, we should master the opportunity to use the bulking agent correctly. It should be used in the field where the plant grows well, the light is sufficient, the temperature is suitable, and the water and fertilizer are sufficient. This greatly reduces the chance of empty fruit.
3, tomato green fruit
Tomato green fruit is brown or green skin on the surface of the fruit. Some fruits are brown and hard, necrotic, hardened, low quality, and tasteless. The reason for the appearance of green peel is that there is insufficient light, high temperature and humidity, partial application of nitrogen fertilizer in the field, excessive water accumulation, etc., which will lead to the occurrence of green fruit. In order to prevent green fruit, we can choose the medium-shaped fruit variety that is thin and has small leaves and anti-green fruit. Re-application of organic fertilizer in the field, adding light-filling equipment in the rainy days, spraying the plants with potassium dihydrogen phosphate or special foliar fertilizer at regular intervals to strengthen water and fertilizer management.
4, tomato deficiency
The potassium deficiency of tomatoes caused the leaves of the lower leaves of the plants to lose green and yellow, which reduced the fruit quality and caused the tomato fruit. Tomatoes are deficient in magnesium, the leaves in the lower part of the plant are generally yellow, and photosynthesis is weakened, which seriously affects the accumulation of nutrients. We have to carry out top dressing in the later stage, mainly based on phosphorus and potassium fertilizer. Available quick-acting fertilizer or grass ash can be used. The leaf surface can be supplemented with magnesium, and 0.2% of magnesium sulfate can be sprayed. For other trace elements, such as boron, calcium, zinc, etc., should also be replenished regularly, pay attention to the dosage and concentration when spraying, to avoid fat damage.
The above is about the introduction of diseases that often occur during tomato planting. No matter which one, it has a great impact on the quality of tomatoes, which seriously affects the income of growers. Therefore, we must do a good job in the prevention and treatment of these diseases.
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