On the question of getting sick tomatoes, tomatoes are sick

Oh you should explain what kind of disease it is, but the main diseases of tomatoes at this time are:

1. Spot blight, gray leaf spot: characterized by many small spots on the leaves, the spots are 1-4mm, nearly round, and the medication: 10% Shigao (Shike, the same medicine) 1500 times + 70% thiophanate-methyl 600 times, sprayed 2 times.

2. Bacterial wilt: This is difficult to get, a worldwide problem. The whole plant wilts, recovers at night in the early stage, and dies after returning, and the leaves remain green.

You can try to use: 500 times the root irrigation of Haorun, 2 days later, and then use thiobacterial copper to irrigate the roots, 5 days later, and then spray the foliar once every 7 days, troublesome.

3. Blight, as difficult as wilt, the whole plant is dead, and half of it is dead, and the leaves are yellow. The prevention and control is the same as above, combined with Penshigao, thiophanate-methyl, etc.

4. Cataplexy and blight: In order to harm the seedlings, there are disease spots at the base of the cataplexy seedlings, which become thinner and die on the ground. Prevention and control: Pulik + Shike, add 15 kg of water to each bag (10ml) to shower the seedbed.

5. Rhizopus blight: It is also mostly harmful to the seedling stage, root rot, die, and can also be grafted seedlings, some people think that the rootstock is strong after grafting, and the roots will not get disease, but at present, most of the rootstocks are not resistant to this disease, prevention and control: Pulik, Methalin, Kelu, etc., spray the roots 2 times.

6. Viral disease: This is more troublesome There is no medicine to cure, and it can only be reduced by preventing and controlling the vector price (aphids, whiteflies, field operations, etc.), spraying some agents (such as virus A, etc.), but it should be noted that there is no medicine to cure the disease, don't listen to some nonsense that sells medicine (I also sell medicine, oh can cure this disease, it is estimated that he does not need to sell medicine, and the Nobel Prize is too low for him.

Late blight, early blight, leaf mold, etc., will appear after 1-2 months, and now they are mainly the above diseases. Pay attention to insect pests (aphids, whiteflies, noctuidaes, etc.). The best way to prevent and control wilt and wilt is to graft seedlings, and most of them are not used.

In a few months, 5 will have time to get another **, and let's get these things specifically.

Summary. Okay, dear, I'm glad to answer for you, can you briefly describe to me what kind of disease tomatoes have? I'll help you with the answer.

Okay, dear, I'm glad to answer for you, can you briefly describe to me what kind of disease tomatoes have? I'll help you with the answer.

The tomatoes are sick, can you see what the disease is, I have ** to send it to you.

Okay dear, how do you send it.

You send the ** over to kiss! I'll take a look for you.

Are most of them like this, dear?

Xiaoye, hugging the head.

There are two causes of tomato lobular disease: one is a physiological disease, and the other is a viral disease.

Have you ever fertilized recently?

Or have you used pesticides recently?

I watched the leaves turn yellow, right?

analysis of the causes; 1. The pesticide concentration is too high or caused by the improper use of hormone leaf fertilizer. 2. The whitening and yellowing of the heart leaves is mainly due to zinc and iron deficiency. 3. Soil drought suddenly watered with cold water to fry the roots, water and fertilizer concentration is too high, soil pollution, poor environment and other factors caused by the root system to carry the damage of the dust, but also collapse will cause the heart leaves to turn yellow

It is a bacterial disease that is most likely to occur in high temperatures and humidity environments, especially in densely planted conditions. The disease is characterized by small round spots on the leaves, which gradually expand into round or irregularly shaped necrotic areas and spread to the fruit. Preventive measures include increased ventilation, humidity control, regular removal of diseased leaves and fruits, and timely spraying of pesticides.

Mushroom spot: This fungal disease occurs mainly in wet weather and usually starts from the ground level. Diseased leaves produce dark, round spots and form powdery spores on the surface of the leaves.

If the Pykai pie is not controlled in time, the lifespan of the diseased leaves will be shortened, resulting in a reduction in the amount of harvest. Preventive measures include increased ventilation, keeping the soil dry, and using antifungal sprays for prophylaxis and**. Leaf mold disease:

It is a disease caused by a fungus and occurs mainly at night when the temperature is high and the humidity is high. Yellow or white waxy spots appear on the diseased leaves, which then spread to the entire leaf surface. Preventive measures include increased ventilation, keeping the soil dry, and timely spraying of agents containing tricyclazole or difenoconazole to prevent and control the effects of the disease.

All three diseases can be reduced with proper management and preventive measures. If in doubt, please consult a relevant professional.

Dear, some of the common tomato diseases include:1Scab Disease:

Small yellow or white spots appear on the leaves, which gradually expand to form round or irregularly shaped scabs, and the lesions are dry and cracked, which will cause the leaves to wither and bury in severe cases. 2.Botrytis cinerea:

Gray mold spots appear on the leaves, stems, fruits, and other parts of the eggplant, which gradually expand and spread, and in severe cases, cause fruit rot. 3.Viral Diseases:

The leaves show symptoms such as yellowing, deformity, and tumor, and the fruits are deformed, smaller, and discolored. If you can provide more symptoms of the disease and Zheng Nama**, we can more accurately determine the type of disease in tomatoes and provide corresponding control measures.

Tomato brown spot disease, also known as black wilt, is suitable for the growth of the fungus at a temperature of 25 28 and a relative humidity of more than 80% in the air. High temperature and high humidity, especially in the high temperature and rainy season, diseases are easy to spread. Vegetable plots are damp, low-lying, poor drainage, poor ventilation and light transmission, insufficient fertilizer, high density, and the disease is severe in the plots with weak growth.

It is recommended to use pyraclostrobin plus difenoconazole plus methiomycin for **, and pay attention to prevention at ordinary times.

Tomato gray leaf spot disease, only harms the leaves, the initial stage of the leaf is covered with dark green round or nearly round small spots, and then along the leaf surface around the expansion of irregular shape, the middle gradually fades green, turning gray-white to gray-brown. The lesion is slightly depressed, 2-4 mm in diameter, extremely thin, and prone to rupture and perforation in the later stage.

In the early stage of the disease, it can be used to kill 3000, azoxystrobin, benzflusilazole, benzoxystrobin spray prevention and control, with an interval of 5-7 days, spraying 2-3 times.

Tomato wilt. Root rot, root decay, and bacterial wilt will be caused by prevention: increase the application of organic fertilizer and biological fertilizer to improve the soil, increase soil permeability, and reduce the source of disease.

Nail cream. Chlorochloronitrobenzene or chloronitrobenzene soil disinfection should be prevented by dipping the roots with algal essence at the time of colonization. It is recommended to use it in the early stage of the disease:

Nail cream. Oxazalin, or pentachloro. Formetham, or tetramycin, or copper chloride, or downy mildew hydrochloride, or mixed amino acid copper, or chlormycolin.

Octochlor, or fludioxonil. Allicin, or Bacillus subtilis, or Bacillus polymyx, or chlorobromoisocyanuric acid and other agents Rooting agent or seaweed fertilizer spray irrigation roots once for 5-7 days, and continuous control 2-3 times. When sporadic occurs, the re-diseased plants are immediately uprooted and destroyed, the lightly diseased plants are irrigated, and the healthy plants are sprayed for prevention and control.

When the incidence of wilt is relatively high and severe, I personally think that there is no significance in prevention and control. In the event of a cloudy day or a sudden sunny day, there will be temporary water loss or even wilting after the plant transpiration water intensifies. The protected area can be properly shaded, and the grass curtains should not be opened at all times, but should be opened at intervals.

If you find wilting, immediately put down the grass curtain to shade it, and if it is severe, you can immediately spray warm water on the foliar surface to alleviate it. Be careful not to use cold water. On the first day of a sunny day, the crops are too weak to be sprayed and watered.

Tomato bacterial necrosis or bacterial wilt is mostly infected by adult plants, the lower leaves are rolled up longitudinally in the early stage of the disease, withered and drooped, some plants appear wilted, the leaf margins of the diseased leaves in the later stage are yellow, the leaf veins turn yellow, and the whole leaves turn brown and wilt, but do not fall off. The stem is damaged, the long and narrow spots are born, the expansion is rapid, the later lesions are cracked, the stem is thickened, a large number of aerial roots are produced, the pith is hollow and rotten, the odor is dispersed, and the plant dies in severe cases.

Prevention and control methods: If the disease has been onset, it is necessary to immediately irrigate the roots of the diseased plants and spray the whole greenhouse plants for prevention and control. Its prevention and treatment drugs are as follows:

Tetramycin, thiamydone, zinc thiazole, mesomycin, allicin, bromonitrile, chunleimycin, trichloroisocyanuric acid, octamine acetate, chlorbromoisocyanuric acid, polymyxoides, Pseudomonas fluorescens, copper thiamethoxen, copper thiasen, copper imidazoquinoline, copper pinesinate, mixin. Pine resin copper, spring thunder. King copper, copper ammonia, cuprous oxide, copper hydroxide, basic copper sulfate, etc., the above agents are sprayed alternately, copper preparations are irrigated once for 5-7 days, and sprayed 3-4 times in a row, which can control the onset of the disease, and the initial occurrence can be recovered.

If the disease is serious, there is no prevention and treatment significance, so it is recommended to remove the bag and take it away for destruction, and the cavity should be sprayed and disinfected with the above agents.