What is the disease of tomato leaves with white lines, and what is the disease of tomato seedlings w

The whitish appearance of tomato leaves may be caused by improper fertilization, which can occur when the nutrients are not balanced, and there will also be leaf wrinkles and scorched leaves. It is also possible that it is caused by insect infestation, and the appearance of spider mites.

, it will suck the branches and leaves of the plant, resulting in a lack of nutrients in the leaves, and in severe cases, there will be poor growth.

It may be caused by the iron deficiency of tomatoes, which can easily turn the leaves white and affect photosynthesis.

ability, directly affect the development of fruits, each time spraying or watering, you can supplement a small amount many times, spray micro-supplement Bili or watering micro-supplement punching magnesium, supplement magnesium, zinc, iron, manganese and other trace elements.

Reduce the problem of trace element deficiency and improve the photosynthesis ability of the foliar surface.

Sometimes there are many white spots on the leaves of tomatoes, which are a typical symptom of harmful gas poisoning, usually caused by the use of plastic films containing harmful additives such as chlorine (which often occurs when new or new greenhouse films are used). When the light temperature is high, volatile harmful substances combine with moisture in the air to form acidic substances, which cause harm to seedlings.

It is also possible that powdery mildew and downy mildew have occurred.

**: Calcium plays an important role in tomato water metabolism, and physiological factors such as large loss of calcium leaching in the soil or excessive nitrogen application cause the occurrence of solar burn disease.

The plants are malnourished.

The development is not luxuriant, and there are too few leaves left on the fruit when the sun shines directly on the fruit or when the tip is beaten, so that the fruit cannot cover the occurrence of solar fever.

If the humidity in the protected area is too high (after rain or snow, and when the temperature difference between day and night is large and the dew is condensed), the shoulders of the fruit are exposed, and the high temperature in the shed is concentrated and burned.

Soil water shortage, excessive dry and hot weather, sunny weather after rain, heavy soil clay, low-lying water accumulation and other conditions can easily cause the temperature of some fruit tissues to rise sharply and burn.

Generally, the fruits and leaves on the sunny side are heavier.

What is the disease of the tomato leaves in my greenhouse?

There is tomato leaf mildew, the leaf is diseased, the front of the leaf appears irregular or oval light yellow green spot, the edge is not obvious, the back of the leaf appears gray-white to black-brown dense mold layer, and the later becomes purple-gray or dark gray to black or yellow-brown; When the humidity is high, the leaf surface lesions can also grow a mold layer, which can be treated with azimethiamine, chlorothalonil or mancozeb, iprodione or pythium, thiophanate-methyl and other sprays, with an interval of seven to ten days, and two to three times.

2. How to prevent and control tomato pests and diseases?

Tomatoes, also known as tomatoes, are nutritious fruits that can be eaten raw or cooked, and can also be processed into tomato paste, juice, etc. Tomato is one of the most widely cultivated fruits and vegetables in the world, and it has been widely cultivated throughout China, and the planting area is constantly expanding, in addition to large-scale facility cultivation, there are also large-scale greenhouses and greenhouses to cultivate.

However, with the progress of large-scale planting, the problem of tomato pests and diseases is increasing. Common diseases such as virus disease, bacterial wilt, early blight, late blight, gray mold, leaf mold, leaf spot, root-knot nematode disease, etc.; Common insect pests such as whitefly, cotton bollworm, American spotted diver, aphid, etc.

Summary. Hello, there are white lines on the tomato leaves, which may be spotted loon flies laying eggs and parasitic inside the leaves, and the eggs are made into circuitous holes inside, so they are white.

Dear, it is recommended to inject some fly amine to kill eggs, and at the same time to kill adult insects, and kill the eggs to achieve a good prevention and control effect.

What is the disease of tomato seedlings with white lines on their leaves.

Hello, there are white lines on the tomato leaves, which may be the spotted submarine fly laying eggs and parasitic inside the leaves, and the eggs are in the holes that are roundabout, so they are white. Dear, it is recommended to inject some fly amine to kill eggs, and grind the baby at the same time to kill adult insects, and the eggs can be sold to achieve a good prevention and control effect.

Dear, this is an insect infestation, this American spotted submarine fly is also known as a ghost painting charm, and it will appear on the surface of the leaves with irregular and curvy painting marks.

Dear, here are some specific methods for you to exterminate insects: you can use avermectin, or Flyamine, or Flyamine. Insecticidal monometer, imitation ruler or avermectin and mycetamine compound agent and other drugs plus silicone spray control.

Prepare for high and silicone additives together, the effect is better, in order to better exert the effect of the drug Suggested medication: avermectin fly amine 30 (suspension) + silicone, the effect is very good. If it is an outbreak period, master the number of days between injections, don't wait that long (-

There are many reasons for the white and dry leaves of tomatoes.

1. Lack of water: In the process of tomato growth, if you can't replenish water in time, the branches and leaves will be in a state of dehydration, which will dry out. When curing, if you find that the soil is dry, you should water it immediately, generally 2-3 days, and you can water it once.

2. Pest and disease attack: When there are germs or insects on the plant, its leaves will be damaged, which will also cause the leaves to dry up. It is necessary to spray with drugs as soon as possible, and if pests and diseases are not controlled in time, tomatoes will easily die.

3. Improper fertilization: Tomatoes should be supplemented with fertilizer in time during the growth period, but if the fertilizer used is not fermented well, it will be easy to suffer from fertilizer damage, and the root system will be damaged, so that the leaves will dry out.

How tomatoes are cared for.

First, the maintenance method.

1. Substrate selection: its requirements for soil are relatively low, with deep soil, good drainage and air permeability and loam containing more organic matter, an appropriate amount of organic fertilizer can be applied as a base fertilizer before planting, which is conducive to the growth and development of plants, and the fruit is large and full. Potassium dihydrogen phosphate can be applied to fertile leaves before flowering.

Promotes its flowering and fruiting.

2. Light management: it is more light-loving, and the requirements for light conditions at different stages of growth are also different, no sunlight is needed during germination, and sufficient light should be given at the seedling stage and flowering and fruiting period, which is conducive to the development of seedlings and full fruits. If the ambient light is insufficient, it is easy to cause the flower buds to differentiate, and if the light is too strong for a long time, it is easy to cause the fruit to be burned by the sun.

3. Water management: its root system is relatively robust and developed, the water absorption is relatively strong, the leaf water evaporates quickly, and it is a drought-tolerant but water-demanding plant. At its seedling stage, attention should be paid to moderation of watering, the soil should not be too wet, and irrigation should be strengthened when flowering and fruiting.

Usually usually watered once every ten days or so, you need to pay attention to drainage, the soil is too wet to cause root rot, too dry is easy to make the leaves withered.

4. Temperature management: it likes a warm environment, cold tolerance is relatively poor, the seedling stage is suitable for 15 -25 temperature conditions, if the ambient temperature is lower than 15 or higher than 35, it will affect its flowering and fruiting.

Second, breeding skills.

1. Propagation method: its propagation method is based on the sowing method, the seedling soil is best to use garden soil and agricultural fertilizer according to the ratio of 1:1 configuration, after sowing should keep the ambient temperature at 25 -30 until the emergence of seedlings, and the ambient temperature should be maintained at night above 10.

2. Flowering promotion method: If you want to promote its flowering and fruiting, you can apply foot fertilizer before planting, properly top dressing and give enough sunlight after planting, and strengthen water and fertilizer management, including nitrogen fertilizer.

and potash fertilizer are conducive to the expansion and fullness of its fruits.

1. Symptoms. 1. Symptoms.

The damage is not obvious at the seedling stage, and begins to damage after flowering, the leaf color becomes lighter, atrophies, starting from the lower part of the leaf, then the upper part of the leaf, and finally the middle of the leaf, and finally withering and dying.

2. Pathogenesis characteristics.

1) It is easy to develop diseases under high temperature and humid conditions.

2) The temperature is above 30 degrees Celsius.

3) It rains continuously, or it is easy to get sick after raining.

4) Continuous cropping, poor ventilation, and poor management are also easy to get sick.

Second, prevention and control methods.

1) Choose disease-resistant varieties and 4-5 year rotation.

2) Don't water the ground too often.

3. Ideal medicine.

Using Bacillus subtilis with Trichoderma harzianum mycorrhizal irrigation has a better effect, and it is also worry-free and labor-saving.

4. Usage. 1. Root irrigation is best when the soil is dry and wet. The advantage of this is that it can fully kill the harmful bacteria and root pathogens in the soil.

2) The concentration should not be higher than 1500 times the solution, and it is best.

3) Do not water before root irrigation.

4) Symptomatic application according to the incidence of the disease.

The wilting and death of tomatoes, eggplants, and cucumbers is caused by many reasons, but in specific practice, it is necessary to flexibly use control methods. Only by doing so can the proud vegetable industry easily move towards the road to wealth.

The humidity is high and the temperature is strong, and the strong light comes out after the rain, which can be sprayed with a biological pesticide, called the detoxification leaf exhibition or green exhibition, and the effect is achieved over and over again.

The white spots on the leaves of the greenhouse tomatoes are due to the fact that the tomatoes are infected with mildew. To be infected with this germ, you only need to buy some "carbendazim", which is equipped with a certain measuring disc according to the instructions and sprinkled on the leaves, sprayed about three times a day, and it will be good in a few days.

If the plant has pests and diseases, it should be used in time to spray the plant leaves evenly, and it should not be watered during the medication, otherwise there will be no effect.

The reason for the occurrence of this disease is mostly due to perennial heavy cropping and low temperature frost damage, if not timely control of tomato plant leaves will appear leaf edge upward rolling, leaf back whitish.

Summary. Hello, I'm glad for your question Kiss Tomato seedling leaves turn white In this case, kissing refers to the malabsorption of nutrients in the tomato! Kiss

Hello, I'm glad for your question Kiss Tomato seedling leaves turn white In this case, the pro-sleepy and the first kiss refers to the poor nutrient absorption of the tomato! Kiss Wang Shu

Or it is inappropriate fertilization.

Either that, they are infected with viruses or pests or diseases

Do you know how to turn white?

Kiss, there are not many white

The middle is white. Kiss

Large-scale. This is caused by malnutrition

This is the case in many cases.

How to fix it. The soil quality is not suitable

How about the temperature kiss

It is also possible that this fertilization is inappropriate

It is recommended to love and kiss this temperature

Adjust it to the right temperature for the seedlings

Kiss Don't be too high, but too low

And then, kiss this, don't be too dark, it's Dapeng's words.

There should be enough sunlight inside the shed to kiss

Fertilization should be appropriate.

Kiss and apply fertilizer diligently

That's it. Kiss

Don't fatten too much.

It is easy to burn seedlings and kiss them