What causes tomato leaves to wilt and shrink?

Tomato is a very popular vegetable, which has a large planting area in the north and south of our country. Tomatoes are very rich in nutrients, so they are also popular with many people. However, when we grow tomatoes, we often encounter many problems that affect the growth of tomatoes.

1. Pruning too early.

When planting tomatoes, we need to pluck and prune. However, it is necessary to pay attention to the topping time, if the topping is too early, it is easy to lead to the growth of axillary buds, resulting in the inability of the phosphoric acid in the leaves to be transported, and the leaves will also age, resulting in the phenomenon of leaf shrinkage. In addition, when pruning, it is not advisable to remove the side branches too early.

It should be carried out until the side branches grow to about 7cm, if the pruning time is too early, it will cause the assimilation area of the leaves to be too small, which will affect the growth of the above-ground part of the plant, and will also have a great impact on the growth of the roots, resulting in leaf rolling.

2. High temperature and drought.

At the peak of tomato fruiting, temperature and moisture are very important. If you encounter hot and dry weather, then you should pay attention to watering in time and do a good job of hydration. If you don't water and replenish it in time, it will have a great impact on the growth of tomatoes.

Because at this time, the area of the leaves is very large, and the environment of high temperature and strong light will cause the leaf transpiration to be too strong, and the water will evaporate too quickly, so that the lower leaves of the plant will shrink.

3. Improper fertilization.

In the process of tomato growth, the demand for nutrients is still relatively large. Therefore, we should pay attention to fertilization, control the application of nitrogen fertilizer, and remember not to apply too much nitrogen fertilizer. If too much nitrogen fertilizer is applied, it is easy to cause fertilizer damage to tomatoes, resulting in leaflet flipping and shrinking.

In addition, excessive application of nitrogen fertilizer will lead to a lack of phosphorus, potassium and various trace elements in tomatoes. Then it will cause the leaves to be too small and deformed.

4. Disease and drug damage.

Diseases are also a major cause of curling of tomato leaves. Among them, especially viral diseases, tomato leaves tend to fade green, become smaller and shrivel after the appearance of viral diseases. Generally, it is mainly on the heart leaves and the upper leaves of the plant, especially in high temperature and strong light.

Then there is the pesticide damage, many people use the agent to dip the flower during the tomato flowering period, if the concentration is too large or the leaves are in direct contact with the agent, then it will lead to leaf rolling.

Lack of light, malnutrition, poor root development, prolonged exposure to sunlight, lack of water, and exposure to viruses.

Mainly because of the pests in it, it must be that you don't usually use pesticides, so it attracts a lot of bugs.

It can be caused by too much fertilization, or it can be caused by too low temperature.

The top of the tomato is wilted. It may be due to a lack of effective fertilizer and water**, that is, the cause of drought. Another point is that it is infested by certain pests and diseases, which usually occurs.

The diseases and pests of tomatoes include bacterial wilt, early blight, late blight, spot blight, gray mold, cotton bollworm, melon silk borer, whitefly, whitefly, tea yellow mite, etc. To prevent and control the occurrence of pests and diseases, choose varieties with strong resistance to pests and diseases before planting, carry out seed disinfection treatment before sowing, and do a good job in water and fertilizer management.

The efficacy of tomatoes!

1. It helps digestion, tomatoes contain citric acid, malic acid, pectin and other ingredients, which have the effect of enhancing gastrointestinal peristalsis, promoting digestion and preventing constipation.

Second, the effect of improving immunity, regular consumption of tomatoes can significantly enhance the body's immunity. Xihong contains carotenoids, which can reduce the incidence of death due to fever and diseases such as cough, respiratory infections, and measles in children.

3. Tomatoes have the effect of preventing and treating cardiovascular diseases, the crude fiber in tomatoes can reduce blood lipid content, and vitamin C can also improve the metabolism of lipids. Reduce the level of cholesterol and triglycerides in plasma, and prevent the occurrence of vascular diseases such as myocardial infarction and atherosclerosis. In addition, the potassium and magnesium ions in tomatoes can also dilate blood vessels and have a hypotensive effect.

Fourth, promote epithelial growth, tomatoes contain carotene, and its physiological function can maintain the normal growth and biochemistry of the epithelium. Prevent the occurrence of respiratory tract infections, night blindness, dry eye and other diseases. At the same time, tomatoes also have anti-cancer, anti-cancer and ** effects.

How to deal with the curling and shrinking of tomato leaves:

1. Replenish water.

Tomato leaf curls are mainly due to lack of water, especially in spring and summer, the plant has a greater demand for water, so it must be watered more to keep the soil slightly moist, so as not to evaporate too quickly, and the leaf surface will dry and curl.

2. Apply fertilizer.

Tomatoes need fertilizer during the growth period, especially around the flowering and fruiting period, phosphorus and potassium phosphate fertilizers and potassium dihydrogen phosphate can be applied, if the tomato roots can not absorb nutrients, there will be malnutrition, so that the leaves will wither.

3. Prevention and control of diseases.

Tomato leaf curls are mainly caused by viral diseases, after the onset of the disease, bacteria invade the inside of the leaves, so that the leaves are dry and curly, and will fall off when it is serious.

4. Loosen the soil.

Tomatoes are suitable for growing in deep, breathable and well-drained soils, if the soil is too compact, the roots will not breathe well, and the leaves will be curled and yellow, at which point the soil should be loosened once, or the tomatoes should be transplanted into fertile, soft fields.

How to deal with the curled and wrinkled tomato leavesIf it is a pathological lesion, it should be prevented and treated early.

Vegetable farmers in the rural Guanzhong area generally choose general pesticides, or amino acids for tomato foliar fertilizer spraying, if severe, spray once every other week, spray 2 3 times; If the condition is average, spray once every 10 days, about 3 times in a row.

If the vegetable farmer is unable to identify, he can ask the experienced vegetable farmer for guidance, and the pathological plant management is the most important, which is directly related to the growth of the tomato and the subsequent fruit growth.

Before tomato planting, pay attention to the management of pre-operations.

It is necessary to turn the soil deeply, apply plantar fertilizer, pay attention to the application of multi-element micro-fertilizer, and do not apply nitrogen, phosphorus and potassium fertilizer, which must be applied in proportion. This is crucial, if it is planted in a large area, especially to avoid heavy cropping, which is also one of the important causes of curly disease.

Either the weather is too hot and there is a lack of water, or it is not properly protected and attacked by pests and diseases. All are adverse reactions.

It should be that there is a pest, because when there is a pest, the leaves will shrink, and pesticides can be sprayed**.

1) High temperature and drought: Tomato likes warm climatic conditions, not tolerant to high temperature and drought, once it encounters high temperature and drought for several days, in order to reduce water transpiration, the stomata on the leaves will be closed, causing the leaves to retract or shrink. (2) Drastic temperature changes:

In hot weather, irrigation at noon or sudden sunshine after rain, because the plant cannot adapt to the sudden change in weather conditions, it will cause physiological abnormalities and cause leaf rolling. (3) Weakening of the root system: Tomato has poor root development at the seedling stage, or serious injury during planting, which will cause the root system to absorb water weakly.

Tomatoes are a very popular fruit and vegetable. Tomatoes have a moist taste, sweet and sour taste, and are widely grown. However, tomatoes are often rolled up, which is very troublesome for vegetable farmers.

The first is the impact of the environment. Be sure to give enough water during the tomato planting process. When the roots of tomatoes are damaged, the roots cannot absorb water in time, which will lead to drought and water shortage of tomato plants, and the leaves will roll back.

Especially in summer, when the weather is hot and the soil is severely dehydrated, the leaves of tomatoes can shrink and dry up. When the temperature is too high, the tomato leaves lose water very quickly, and the roots cannot transport water, so the tomato leaves will automatically roll up to reduce water evaporation. In addition, it is necessary to supplement nutrients during the process of tomato planting, when the nutrients are insufficient, the leaves of the tomatoes will also shrink and dry up, and the leaves will give the only nutrients to the tomato fruits.

Another reason why the leaves of tomatoes are curly and brittle is a viral attack. When some virus-carrying insects bite the leaves of tomatoes, the leaves will appear yellow, soft, curled and wrinkled. When the tomato plant is too short, it is necessary to consider the cause of the virus.

At this time, we must pay attention to spraying drugs and prevent and treat them in time to avoid greater losses. There are many mosquitoes and pests in summer, so be sure to control the concentration when spraying tomatoes. Excessive concentrations of pesticides can also cause spots on tomato leaves, which roll up upwards.

Therefore, it is necessary to be careful in the selection of seedlings when planting tomatoes. Generally, it is necessary to choose seedlings with large leaves, thick leaves and strong roots. Pay attention to regular watering during the planting process.

In the summer drought, we must control the amount of watering and prevent and control pests and diseases in time. These are the reasons why tomato leaves become curled and dry, readers must prescribe the right medicine, according to the different diseases of tomato leaves to choose prevention and control methods, I hope these methods can help you.

It may be because the temperature is too dry during the growth of tomatoes, and the leaves will wither and shrink after exposure to the sun, or it may be that it has experienced wind chill at that time, or it has been attacked by some diseases and insects, or it may be that the owner has applied too much or too little fertilizer when growing.

This may be because the weather is too dry, the water supplement is insufficient, and there are diseases and insect disasters on the leaves of tomatoes, so it is necessary to water in time, apply ground fertilizer, spray a certain concentration of pesticides, and use farmhouse fertilizer to ensure the fertility of the soil.

It may be that the outside quota is too high, it may be that the soil is too dry, it may be infected with bacteria, it may be that too much fertilizer is used, or it may be that the leaves are deformed.

If you are exposed to the sun, add a fixed pole.

That's when it's too hot, water it properly.

There is no fertilization, you can't put it too close, too much fertilizer will burn the roots and burn to death.

It may be Verticillium wilt, or Phytophthora root rot, or physiological wilting. If careful identification is required, and it is difficult to distinguish with the naked eye, the pathogen can be microscopicly examined with the help of a microscope.