How to deal with the curled and wrinkled tomato leaves

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.

Tomato leaves roll down the reason.

1. Watering after a long drought.

If the soil is too dry in the early stage and the water is too large in the later stage, the transpiration of crop leaves will be seriously inhibited, and the leaves will roll back and wilt downwards when the leaves show a state of self-protection.

2. The impact of low temperature frost damage.

If the temperature continues to be below 10, the mesophyll cells of the crop will be damaged by the cold, and the leaves will begin to wilt, and in severe cases, the leaves will dry up and bend downward, and the mesophyll cells will freeze and whiten. When the spring cold is inverted, it will also cause the new shoot leaves to curl downward!

3. Pest damage.

The body of the tea yellow mite is very small and often difficult to identify with the naked eye. The main symptoms of mite damage are narrowing, stiff and erect leaves, downward shrunken or twisted deformities, and finally bald tips.

The leaves will become smaller, harder and thicker, and the most important thing is that the back of the leaves is oily and has a brown rust color. Aphid damage can also cause severe curling of leaves, because aphid habits generally feed on the back of leaves and young tissues, so aphid infestation can also cause different degrees of leaf rolling.

4. Nematode hazards.

Nematode infestation will cause the roots to absorb nutrients and conduct them in, and the roots will have severe lesions, causing the leaves to turn downward.

The shrunken leaves of tomatoes are generally thought to be suffering from viral diseases.

Tomato leaves curled, wrinkled and shrunken, in the growth period will often appear, the cause of curling is very complex, except for a very few varieties of leaf curl varieties, most of them are caused by unsuitable environmental conditions or viral diseases.

Leaf curling caused by unsuitable environmental conditions is a physiological disease, and leaf curling will occur on the leaves of the whole plant. However, the leaf shrinkage caused by viral disease is caused by infectious diseases, and the leaf shrinkage only occurs in the top new leaves, and the lower old leaves are not susceptible to damage. The causes of leaf shrinkage are as follows:

1. Topping and pruning too early. Premature topping is easy to breed axillary buds, and the phosphoric acid in the leaves has nowhere to be transported, resulting in the aging and withering of the leaves and a large number of shrinkage.

2. High temperature and drought. After entering the peak period of fruiting, the water can not be replenished in time in case of high temperature and dry weather, at this time, the leaf area is large, the high temperature and strong light make the leaf transpiration strengthened, and the lower leaves of the plant are prone to shrinkage. In shed cultivation, shrinkage tends to occur in the middle and late stages of growth, especially at the vents.

3. Improper fertilization. Excessive application of nitrogen fertilizer will cause the leaflets to turn and curl; Severe phosphorus and potassium deficiency and lack of trace elements such as calcium and boron can cause leaf stiffness, leaf margin curling, or small and deformed leaves.

4. Caused by viral diseases. Tomatoes are susceptible to viral diseases, causing the leaves to turn green, become smaller, and shrink the leaf surface. Leaf curling, mostly manifested in the heart leaf and upper leaves, is easy to occur under high temperature and strong light.

Tomatoes are actually what we usually call tomatoes, which are very common on people's tables, and now many rural friends will also rely on planting tomatoes to obtain income, but there will always be various problems in the process of tomato planting, such as tomato leaf curl, so what are the reasons for tomato leaf curling?

First, topping and 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 the pruning is boring, the time to remove the side branches should not be 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 high temperature 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.

Fourth, 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 in the tomato flowering period to make the spring kernel with the agent for dipping, if the concentration is too large or the leaves are in direct contact with the agent, then it will lead to leaf rolling.

To sum up, in fact, these problems can be avoided in the daily management process, as long as everyone usually manages more carefully, many problems will reduce the probability of occurrence.

Physiological leaf curling. Symptoms: Before and after the tomato is harvested, the leaves of the first ear are slightly curled, or the whole leaf is curled into a cylindrical shape and becomes brittle.

This is mainly due to high temperatures and droughts, and the stomata of tomato leaves are closed. Control measures: drought resistance exercise after planting and before fruit setting; After fruit set, water and fertilize in a timely manner and cover the shade net, so that the day is covered and the night is uncovered, and the cloudy day is not covered.

Topping and pruning too early. Premature topping is easy to breed axillary buds, and the phosphoric acid in the leaves has nowhere to be transported, resulting in leaf aging and a large number of curling of the mold. Removal of side branches is generally carried out when it grows to 7 cm to cover the top, if the branch is too early, the leaf assimilation area is reduced, the aboveground growth of the plant is poor, and the development of the root system is affected at the same time, and the ability to absorb water and fertilizer is weakened, which in turn induces leaf curling.

High temperatures, drought. After entering the peak fruiting period, the water can not be replenished in time in case of high temperature and dry weather, and the leaf area is large, and the transpiration of the leaves is strengthened by high temperature and strong light, and the lower leaves of the plant are prone to shrinkage. In shed cultivation, this situation is prone to occur in the middle and late stages of growth, especially at the vent, and the shrinkage is often heavier, and there are few reasons for this species at present.

Improper fertilization. Excessive application of nitrogen fertilizer will cause leaflets to turn over and curl; Severe phosphorus and potassium deficiencies, as well as lack of calcium, boron and other trace elements, will cause leaf stiffness, leaf margin curling, or leaf thinness and deformity.

Strengthen the management of greenhouse cultivation. According to the growth and development law of tomatoes, the temperature and humidity should be regulated, especially in the middle and late stages of growth, the soil should be kept moist frequently, and the shed should not be too dry.

Strengthen fertilizer and water management. Increase the application of well-rotted, high-quality farm manure to prevent excessive nitrogen fertilizer and provide balanced nutrients for plant growth. Avoid excessive drought, but do not water after drought, especially pay attention to the tomato can not be watered in low temperature weather, this is due to the sudden decrease in ground temperature, the root system can not adapt to sudden changes, water absorption is inhibited, causing physiological drought but aggravating leaf curling.

It's not an aphid, it's a whitefly, it's a terrible thing.

It can be sprayed in time with imidacloprid, chlorchloride, kung fu, enemy killing, etc., and must be sprayed evenly, especially on the back of the leaves.

It is not advisable to spray daily insecticides to kill mosquitoes and flies.

1. Leaf curling caused by viral diseases.

Symptoms: Viral diseases are generally transmitted by virus-carrying insects such as aphids and whiteflies. The susceptible plants are short, the leaves are curled and clumped, and in severe cases, the leaves only have veins and no mesophyll.

Prevention and control measures: in addition to the selection of antiviral varieties and the implementation of crop rotation, in the early stage of the disease, spray potassium permanganate 1000 times liquid, can also treat viral diseases and soft rot and other diseases, can also add 100 grams of virus A (K), 50 grams of green Fenwei and 25-30 grams of net in 50 kg of water, to make a mixture of spray control, spray once every 6-7 days, spray 2-3 times.

2. Leaf curling caused by hormone damage.

Symptoms: When hormones such as 2,4-d and mequat are used too much or in too high concentrations, the tomato leaves or growth points will be bent, the new leaves will not be normal, the leaf edges will be twisted and deformed, the stems will be raised, and the color will become lighter. Prevention and control measures: It can be controlled with 3000 times of natural brassin.

3. Physiological leaf curling.

Symptoms: Before and after the tomato is harvested, the leaves of the first fruit are slightly curled, or the whole leaf is curled into a cylindrical shape and becomes brittle. This is mainly due to high temperatures and droughts, and the stomata of tomato leaves are closed.

Prevention and control measures: carry out drought resistance exercise after planting to before fruit setting, water and fertilize in a timely manner after fruit set, and cover the shade net, so that the day is covered and the night is uncovered, and the cloudy day is not covered.

Fourth, the leaf curling caused by the damage of the yellow mite.

Symptoms: Narrowing, stiffness, erection, shriveling or twisting of the leaves, and finally baldness. Control measures: It can be sprayed with 3000 times of Aifuding or 20% 2000 times of mite death, sprayed once every 6-7 days, and sprayed 2-3 times in a row.

5. Leaf curling caused by nutrient deficiency.

Phosphorus deficiency: the back of the diseased plant leaves is purple-red, small brown spots appear on the leaves, the lower leaves are rolled up, the old leaves turn yellow, and the tips of the leaves are black-brown and die. Generally, low temperature in tomato seedlings will affect the absorption of phosphorus, and acidic or sticky soil will also easily lead to phosphorus deficiency in plants.

Control measures: increase the application of phosphorus fertilizer and spray potassium dihydrogen phosphate.

Magnesium deficiency: In the first inflorescence expansion stage, the old leaves in the lower part of the diseased plant lose green, and yellowing occurs between the leaf veins, and then expands upwards to form yellowed spotted leaves, and the heavy leaves are stiff or the leaf margins are rolled up. Prevention and control measures:

Add nitrogen, phosphorus, potassium vegan fertilizer or foliar spray magnesium sulfate 50-100 times.

What's going on with the curly tomato leaves.

The curling of tomato leaves may be due to high temperature and drought weather after entering the peak fruiting period, but the water is not replenished in time, so that the lower leaves of the plant will curl upwards due to lack of water.

Tomato leaves are curled and withered.

Tomato leaves are curled and dry and can live, it is recommended to remove the leaves with serious diseases at the bottom, and then spray them with R. solanacearum + quick net + garlic oil, and add some systemic chemicals to enhance the quick-acting effect and control the humidity if necessary.

Tomato leaves curl and fall.

Tomato leaves curl and fall is generally a disease, in the environment of high temperature and strong light, it is easy to develop viral diseases, there are two main kinds, one is mosaic virus, the leaves have patterns, the other is leaf curling virus, there is no pattern, the leaves are shrunken, like watermelon leaves, the growth is very small.

Causes of curly tomato leaves.

Tomato leaf curling may be caused by improper medication, high temperature in summer, some vegetable farmers use excessive concentrations of pesticides, which will cause the leaves to curl upward.

If the newly grown tomato leaves are curled, it may be because the root system of the plant is burned due to excessive nitrogen fertilizer, which affects the absorption of water and confiscates it, which will cause the tomato leaves to roll up.

Tomato leaf wilting treatment method.

1. Cultivating strong seedlings: When raising tomato seedlings and planting and transplanting, biological fertilizer can be used to dip the roots, pay attention to protecting the root system, prevent root damage, promote root growth, and cultivate strong seedlings.

2. Strengthen water and fertilizer management: In the middle and late stages of tomato growth, the ability of the root system to absorb water refers to the weakening of the reed, so it should be watered regularly to avoid long-term drought of the plant.

3. Spraying foliar fertilizer: In the middle and late stages of tomato growth, especially in the high temperature season, potassium dihydrogen phosphate can be sprayed before 10 a.m. to prevent excessive water loss and curling of leaves.