How to cure umbilical rot in tomatoes grown in greenhouses? 100,000 urgent!!

If applying calcium fertilizer does not work, you review your watering again and whether the soil is salinity!!

Effects of water imbalance. During drought, the umbilicus of the fruit is most likely to lose water and cause tissue necrosis. When a large amount of water is supplied, the cells are ruptured and filled with water due to the excessive distension of the pedicle cells, and finally discolor and necrosis. That is, it is caused by too much, too little or too little water.

Soil salinization can also cause this physiological disease.

The following initiatives should be undertaken:

1. Timely irrigation to prevent the soil from being dry and wet, especially not to make the soil too dry. When the first water is planted and the second water flower begins to set fruit, the amount of water should not be too large; After the third inflorescence has bloomed, the first ear of fruit is as big as an egg, and then it is watered heavily. Keep the soil moist, summer irrigation should be carried out in the early morning or evening, pay attention to frequent watering, shallow watering.

2. Choose sandy loam soil varieties rich in organic matter and strong water retention. When the soil is deficient in calcium, 50 kg of saltpeter lime or calcium carbonate per mu is evenly sprinkled on the ground and turned into the cultivated layer.

3. Avoid excessive application of nitrogen fertilizer, especially fast-acting nitrogen fertilizer, do not apply too much at one time, pay attention to the appropriate nitrogen, phosphorus and potassium, and apply more decomposed organic fertilizer.

4. At the onset of the disease, fertilize the roots with 1% superphosphate or calcium chloride, once every 7 days, with good control effect, pay attention, be sure to spray on the leaves and fruits, especially on the fruits, must be sprayed, only in this way is the effect good!

5. Avoid continuous cropping in heavy cropping.

It is caused by calcium deficiency, and the possibility of this thing being prevented and the effect after getting sick is very small.

There are many reasons for calcium deficiency, mainly high soil concentration, high nitrogen fertilizer leads to rapid growth, too large gap between greenhouse temperature and soil temperature, improper irrigation, soil calcium deficiency, etc., you check the information on calcium physiology.

When the symptom that has occurred is small, I remedy it, and when I remove it when it is big, I promote the next fruit development.

Now is the rainy, high temperature, high humidity weather, but also the season planted tomato fruit set expansion period, in case of rainy high temperature and drought, it is very easy to occur this disease. Therefore, when it rains, do a good job of drainage in time, and pay attention to water retention and replenishment after the weather is sunny to prevent umbilical rot from occurring due to large differences. In the growth and young fruit stage of the fruit, if the rotten fruit is found, it should be removed in time, and the young fruit that is not diseased should be sprayed with boron and calcium fertilizer in time, which can reduce the nutrient consumption in the plant and avoid cross-infection, so as to ensure the healthy growth of the fruit.

At the same time, you can also carry out fruit thinning treatment, for the tomato with more flowers and fruits, it is necessary to properly thin some, generally only need to keep 4 to 5 tomatoes that grow well early, so as to reduce the absorption of calcium between the fruits, which is conducive to the remaining fruits to have a good sales sample of neatness. Tomatoes absorb water and nutrients, mostly through the root system. If the fertilizer is applied excessively, the concentration of the soil solution is too high and the root system cannot absorb it.

Because the root system absorbs water and nutrients from the soil by osmotic pressure, the concentration of soil solution is too high, and reverse osmosis will occur, which will cause physiological water shortage.

Therefore, it is necessary to pay attention to watering in the dry season in summer, especially during the flowering and fruit setting period. Of course, watering should pay attention to the temperature control, so as not to cause other diseases. Shading measures can also be done to reduce the transpiration of tomato plants and reduce water loss.

It is best not to supplement calcium fertilizer alone, but to pay attention to the application of boron fertilizer, which can promote the absorption of calcium fertilizer by plants. Within 30 days after the tomato bears fruit, it is a critical period for the fruit to absorb calcium, and 1% superphosphate or calcium chloride can be sprayed on the foliar surface, and a small amount of boron fertilizer can be added to ensure the calcium and boron during this period.

According to the growth and development of tomatoes, formula fertilization technology was adopted, supplemented by foliar spray. For example, in the second half of the month and 45 days a month, calcium fertilizer can be sprayed three times in a row, calcium chloride or 1% superphosphate can be selected, and plant growth regulators such as brassinin can be added. It is best to spray it with the fruit.

The key to the prevention and control of tomato umbilical rot and the solution of calcium deficiency in tomatoes is to promote the activation and utilization of calcium in tomatoes, that is, to increase the transformation of calcium from the root to the leaves, leaves and then to the fruit, and promote the activation and transport of calcium in the plant. Since the umbilicus of the fruit is the weakest part of water transpiration, soft rot occurs here due to calcium deficiency, and calcium transport is mainly carried to the fruit by water transpiration. Therefore, calcium supplementation should be sprayed directly on the fruit to promote calcium utilization.

Nitrogen control can adjust the vegetative growth rate of plants to achieve balanced growth. Reasonable irrigation can ensure the smooth growth environment and nutrient delivery of the root system.

Special chemical fertilizers should be used immediately, because only then can the growth of tomatoes be better guaranteed.

1. The use of plastic film mulching to cover the land where tomatoes are planted can keep the soil moisture and nutrients relatively stable, reduce the loss of water and calcium and boron nutrients in the soil, and prevent the occurrence of umbilical rot. 2. Appropriate amount of timely irrigation, tomatoes need a lot of water when they grow and develop, but the water can not be too little, nor too much, according to the dry humidity of the soil and the growth of the plant, appropriate water. 3. Reasonable fertilization, applying too much nitrogen fertilizer, will lead to excessive plant growth, so that tomatoes can not absorb enough calcium and boron from the soil, resulting in imbalance in the ability to control water, causing umbilical rot, so reasonable fertilization is required.

Reasonable fertilization does not use unrotted organic fertilizer and fertilizer with too high concentration, so as not to hurt the roots and avoid excessive partial application of nitrogen fertilizer within 30 days after fruit set, increase the application of calcium fertilizer, such as 10% superphosphate calcium chloride or calcium nitrate for root top dressing, from the beginning of the flowering period, spray once every 15 days, can receive good control effect. Increase calcium fertilizer. Before tomato transplanting, 50-75 kg of lime per mu was applied to the acidic soil where umbilical rot occurred, and evenly sprinkled into the ground, especially the excessive use of chemical fertilizer all year round, and the soil acidification was completed, and the effect was particularly significant.

During flowering, the foliar surface is supplemented with boron fertilizer. Generally, foliar boron fertilizer is sprayed twice during the whole growth period, and the absorption efficiency and safety of boron fertilizer products with pure boron content of 21 are relatively high. For example, in the early flowering period and the full flowering period, 50 grams of Sangma instant boron are used to spray 1 time per mu, and the water consumption per mu is 40 50 liters.

Choose disease-resistant varieties. Tomato varieties with smooth skin and pointed fruit are more resistant to disease and can be used in areas prone to umbilical rot. Mulching can keep soil moisture relatively stable and reduce the leaching of calcium nutrients in soil.

Water should be replenished in time according to the dryness and humidity of the soil and the growth of the plant to maintain the balance of soil moisture**, especially after the fruit begins to expand, the soil should be kept moist. If irrigation is required, it is advisable to use night irrigation (especially in the hot and dry season) to ensure the normal growth of the plant. In the middle of production, cross in time to remove sick old yellow leaves.

It is not only conducive to the absorption of calcium, but also conducive to the ventilation and light transmission of plants. Pay attention to thinning flowers and fruits, if there is too much fruit setting on the inflorescence, it is necessary to remove some appropriately, and generally retain 4-5 good fruits with early fruit setting at the base, which can not only reduce the competition for calcium between fruits.

Tomato fruiting period, ensure the best moisture, do not dry and wet, drought period, high temperature weather, ground moisture transpiration too fast, do not water watering, so as not to rise the ground temperature, the correct watering method is to use the evening, small water watering, so that the tomato fully absorbs water, conducive to fruit growth.

1. Spray calcium-containing solution, from the beginning of flowering, spray calcium chloride solution, you can add 50 mg kg of naphthalene acetic acid, or spray 1% superphosphate solution, it is recommended that growers can spray 1 time every 15 days, spray 2-3 times.

2. When umbilical rot occurs, the umbilical rot fruit should be removed as soon as possible, the healthy and high-quality fruit should be retained, and the calcium-containing solution should be sprayed at the same time.

It can be controlled with pesticides. Some pesticides can prevent physiological umbilical rot in tomatoes.

Organic fertilizer should be applied more deeply in combination with soil conditions to enhance water retention capacity. Avoid applying uncooked organic fertilizers or applying fertilizers in too high concentrations. The base fertilizer is mainly organic fertilizer, combined with the application of superphosphate in combination with land preparation.

When topdressing, attention should be paid to the combination of nitrogen, phosphorus and potassium fertilizers, and nitrogen fertilizers should not be applied partially.

Tomato umbilical rot, how to treat it.

Hello, glad to answer for you. Umbilical rot is a physiological disease caused by water imbalance, calcium deficiency, boron deficiency and other reasons, generally after the appearance, can not be prevented, can only be prevented in advance, the main methods of prevention and control of umbilical rot are: the use of plastic film mulching will be planted tomatoes on the land covered with plastic film, which can keep the soil moisture and nutrients relatively stable, reduce the loss of water and calcium and boron nutrients in the soil, and prevent the occurrence of umbilical rot.

The growth and development of tomatoes need a lot of water, but the water can not be too little or too much, and the water can be properly watered according to the dryness and humidity of the soil and the growth of the plant. Reasonable fertilization and application of too much nitrogen fertilizer will lead to excessive plant growth, so that tomatoes can not absorb enough calcium and boron from the soil, resulting in imbalance in the ability to control water, causing umbilical rot, so reasonable fertilization is required. The selection of disease-resistant varieties is due to the fact that the umbilicus of the Yanrot Xihongdong jujube is the first area to occur, and the varieties with smoother peel and sharper fruit have stronger disease resistance, which can be selected in areas prone to umbilical rot.

Tomato umbilical rot is also called pedicle rot, some places are called top rot, and there are more strange and resentful names called black plasters. In the case of open-field cultivation, the disease is more severe and fierce when the management technology is lagging behind. Theoretically, the calcium content in the fruit of the tomato grown normally is generally in between, which also belongs to the relatively normal calcium range of the tomato fruit.

If the growing tomato fruit in the field has only calcium content.

<> due to dry weather, the plants do not get enough water, or the water supply is insufficient during the vigorous growth period, because of the lack of water, the fruit umbilicus is affected by drought, and the necrosis of tomato tissue is caused by a large amount of water loss. However, the diseased fruit will not rot easily under normal circumstances, usually the skin of the diseased part will become leather, when the humidity of the cultivation environment is too high in the later stage, the diseased part is easy to be parasitized by other rotting pathogens, and then the lower part of the flesh begins to gradually rout, shrink, and turn black.

Tomato navel rot is a more common physiological disease in the process of planting tomatoes, the occurrence of tomato nabilical rot is mainly related to calcium deficiency, it is generally believed that tomato plants can not absorb enough calcium from the soil, coupled with poor mobility of calcium, the fruit can not get calcium in time to plant vegetable gardens in the hometown, should have the experience of planting tomatoes, tomatoes are very easy to take care of, from planting to harvesting, basically do not worry, but we will also find that not every tomato is intact.

After fruit set, the foliar surface is often sprayed with calcium fertilizer, preferably organic calcium such as sugar alcohol calcium, which can be mixed with other pesticides to spray together, and the top dressing should be balanced fertilization to reduce the amount of nitrogen fertilizer. If there is too much nitrogen fertilizer, the root system will not absorb calcium fertilizer well. Watering fertilizer should be watered frequently with small water, and water supply fertilizer should be balanced.

Tomato navel rot is a physiological disease of tomatoes! This is caused by a lack of calcium, which is not transferable in plants, unlike nitrogen, phosphorus and potassium!

The first is the uneven or unstable supply of water during the growth period. Especially in the case of drought, or when the water absorption ability of the root system is weak, or when the water supply is unbalanced, the umbilicus cannot compete for water to make its growth and development hit a wall, resulting in a large amount of water loss of the fruit, necrosis of the pulp, and the formation of umbilical rot. Spraying Bordeaux liquid in drought conditions is severe.

The second is calcium deficiency. The occurrence period of umbilical rot is 12-15 days after flowering, and the fruit volume growth is relatively fast during this period, and the demand for calcium is large, which is easy to cause local calcium deficiency and lead to the occurrence of umbilical rot.

Third, weak light, long production time, and high soil moisture content will also cause umbilical rot.

1. Weak light, long production time, and high soil moisture content will also cause umbilical rot.

2. The calcium in the soil is absorbed and utilized by plants in the form of calcium ions, and the calcium ions are easily combined with the phosphate ions in the soil to form a precipitate, resulting in the illusion of calcium deficiency, and the potassium content in the soil is too high, which will also antagonize the absorption of calcium. If the nitrogen content is high, ammonium ions are also easy to antagonize calcium ions, resulting in calcium deficiency in plants.

First of all, the cause of tomato navel rot is mainly caused by calcium deficiency。When the calcium content of the fruit is lower, the cells are disordered, lose the ability to control water, and form umbilical rot. In most cases, there is no shortage of calcium in the soil, mainly due to the excessive use of nitrogen fertilizers and other fertilizers in the soil, which makes the soil solution high concentration and affects the absorption of calcium.

When the fruit grows to the size of a walnut, umbilical rot usually occurs. Initially manifested as watery lesions on the umbilicus, they gradually enlarged, causing the top of the fruit to become sunken and discolored.

The second is because the root system has a weak absorptive capacity. Soil dryness and wetness, high and low temperature, drastic changes in water temperature, or soil salinization and soil acidification lead to poor development of tomato roots, or root damage, etc., will cause plants to not absorb calcium normally, which will lead to umbilical rot. Available calcium in the soil is low or low, and plants are unable to absorb enough calcium from the soil.

It leads to the physiological dysfunction of tomato umbilical cord cells, and the loss of the ability to control water and disease.

If you want to get better control, you need to pay attention to the organic fertilizer and calcium fertilizer in the base fertilizer. Calcium fertilizer is best used early and should be used in conjunction with organic fertilizer. The main application of base application can promote the absorption of calcium by plants, and the decomposition products of organic fertilizer can promote the absorption and utilization of calcium and improve the absorption and utilization rate of roots.

Due to the poor fluidity of calcium fertilizer in soil and plants, such as superphosphate is easily fixed in the soil, 200 grams of calcium can be applied per mu. Avoid excessive application of nitrogen fertilizer, which hinders the absorption of calcium by plant roots, and can better obtain the effect of treatment.

The second is the need for timely topdressing. After tomato fruit set, the rapid expansion of the fruit is a critical period for calcium absorption. It can be prepared into a 1% solution with superphosphate and water, or it can be prepared with calcium nitrate and a water wetting agent to make a 5000 times solution.

Or use Green Powder No. 3 to add water to prepare 1000 times of liquid. From the beginning of flowering, spray once every 10 days, spray 3 or 4 times in a row, which can effectively prevent the occurrence of tomato navel rot, only in this way will the tomato get a great harvest.