How to treat tomato wilt? Can tomato bacterial wilt be cured

1) Quarantine. First of all, the quarantine authorities should strictly control the introduction and spread of nematodes. Growers should inspect their orchards for nematodes and take strict measures to keep nematodes out of clean soil. Seedlings with roots without insects should be used for planting, preferably seedlings that have passed quarantine.

2) Pharmaceutical treatment.

Dibromochloropropane has a fumigation function, and the emulsion works best in irrigation water, but considering the adverse effects on groundwater, dibromochlorohydrin should be used with caution. It is a cost-effective method to treat new vineyards and old vineyards that have been infested with nematodes with 1,3-dichloropropane or methyl bromide (the same usage and dosage as for replanting).

3) Replantation treatment:

Vineyards that have lost productivity or that cannot be treated with pesticides should be considered for replanting. Use scissors to cut below the canopy and remove the plant. Do not pull the plant with iron chains, so as not to break the trunk from the surface and leave the root system in the soil.

After clearing the garden, it will be fallow for at least 1 year, and it will take 1 4 years without a host before it can be replanted. The land is furrowed and fumigated, the ditch is 1 meter deep and 1 meter wide. Newly planted seedlings should be root-knot nematodes.

The dosage of dibromochloropropane is liter hectares, applied to the soil deep meters; Distance 1 meter; The amount of methyl bromide used was 315,390 kg hectares and covered with PVC film. If it is not covered, the concentration should be increased, and the dosage is kilogram hectares. Sandy soil should be used with low concentration, deep meters into the soil, and meters away.

Some with kilograms of haectare, without mulching, also received good results. Planting with methyl bromide is delayed by 10 to 14 days, and with dichloropropylene bromo, it takes 3 to 4 months before planting. The number of nematodes in the soil should be carefully monitored, and the earlier the detection, the better.

In order to keep the nematode population low, a chemical treatment is required.

Tomato bacterial wilt is a bacterial disease that wilts throughout the plant. The seedling stage is often not diseased, when the tomato plant is about 30 cm high, the bacterial wilt plant begins to show symptoms. First, the top leaves wilt and droop, then the lower leaves wilt, the middle leaves wilt last, and there are also one side of the leaf wilted first or the whole leaf wilts at the same time.

At the beginning of the disease, the diseased plants wilt during the day and recover in the evening, and the color of the diseased leaves becomes lighter. After the onset of the disease, the soil was dry, the temperature was high, and the whole plant withered in 2 to 3 days; If the temperature is low, even rainy or the soil moisture content is high, the diseased plant can last for 1 week and then die, but the leaves still remain green or slightly light, so it is called bacterial wilt. The epidermis of the diseased stem is rough, the middle and lower part of the stem proliferate adventitious roots or adventitious buds, and when the humidity is high, small water-soaked lesions can be seen on the diseased stem at first, and then turn into brown plaques 1 2 cm long; The vascular bundles of diseased stems turn brown, cross-cut the diseased stems, squeeze them by hand, and the vascular bundles overflow with white bacterial fluid on the section, which is an important feature that distinguishes the disease from fungal wilt and Verticillium wilt.

Tomato bacterial wilt is a bacterial disease, the initial leaves wilt at noon, return to normal in the evening and morning, repeat many times, wilt intensifies, and finally die, but the plant is still green. The middle and lower cortex of the diseased stem are rough, adventitious roots and adventitious buds often grow, and the vascular bundles of the diseased stem turn black-brown, but the roots of the diseased plant are normal. After cutting the diseased stem crosswise, soak it in clean water or squeeze the incision by hand, and there is milky white mucus overflowing (germ pus).

Control of tomato wilt. Copper hydroxide, octychlor, zhongshengmycin, pyrazole, and agricultural streptomycin are used for root irrigation control, and the treatment is repeated once at an interval of 5-7 days, and the treatment is 2-3 times.

What to do if tomato has wilt? Tell you 1 "secret" that is easier to solve.

<> tomato wilt can be **. The control method is: use 90-150 times of R. solanacearum and 1000-1500 times of garlic oil for spraying and root irrigation, continuous root irrigation 2-3 times, once every 2-3 days, spraying needs to be sprayed once a day, continuous spraying for 3 days.

In addition, tomato flowering and fruiting stage can be controlled by spraying 150-300 times of R. solanacearum and 600 times of Wofengsu, which needs to be sprayed 2-6 times, and the roots can also be irrigated at the same time.

Bacterial wilt is a fungal disease to be controlled, but tomato bacterial wilt is actually a bacterial disease. This is a clear difference from blight, and it is also different in the prevention and control. You can spray this copper hydroxide alone, through leaf spraying, or with streptomycin, if you can't buy agricultural streptomycin, you can go to the pharmacy to buy human streptomycin.

Tomato wilt meaning:

Tomato wilt is also known as bacterial wilt disease. Symptoms are not present at the seedling stage. The disease begins at the beginning of tomato fruit set.

First, the top leaf wilts and droops, then the lower leaf wilts, and the middle leaf wilts the latest. The diseased plants wilted significantly at noon during the day at the beginning of the day, and returned to normal at night. At this time, if the soil is dry and the temperature is high, the whole plant will wither after 2 to 3 days until it dies.

If the temperature is low, continuous rain or the soil moisture content is high, the diseased plant can last for about a week before dying, and the plant will remain green after death. The epidermis at the base of the stem of the diseased plant is rough, and a large number of roots of different lengths are often produced. When the weather is wet, 1 2 cm patches may appear on the diseased stems that are water-stained and then brownish.

Bacterial wilt is a bacterial disease caused by infection with the bacterium Pseudomonas solanacium. The disease mainly lives with the remains of diseased plants in the soil for 1 6 years.

Tomato wilt control methods:

1. Crop rotation. The pathogen overwinters in the soil with mycelium or thick-walled spores with the diseased residues, and invades the host from the young tomato roots or wounds in the second year, causing the disease to occur. Therefore, crop rotation with non-solanaceae crops should be implemented for more than 3 years.

2. Disinfection of bed soil. Using new soil, 8 10 grams of 50% carbendazim wettable powder and 4 5 kg of fine soil are mixed with 4 5 kg of fine soil per square meter of bed surface, and the medicinal soil is used to pad the bed and cover the seeds when sowing.

3. Seed disinfection. Soak seeds in warm water at 52 degrees for 30 minutes, or soak seeds in 500 times of 500 times of carbendazim wettable powder for 1 hour, wash and then germinate and sow seeds.

4. Pharmaceutical prevention and control. At the beginning of the disease, spray 500 times of 50% carbendazim wettable powder, or 500 times of 50% methyl tobuzin wettable powder, or irrigate the roots with 10% double-effect liquid 200 times, once every 7 10 days, and irrigate 2 3 times continuously.

The best best methods for tomato bacterial wilt are as follows:

As soon as bacterial wilt is detected, we spray it as soon as it appears, and at the same time cooperate with this root irrigation piece to control it. For example, we can spray this copper hydroxide alone, through leaf spraying, or with streptomycin, if agricultural streptomycin can't be bought, you can go to the pharmacy to buy human streptomycin.

It is generally recommended that farmers and friends use three grams of streptomycin in a bucket of water, and use three grams of streptomycin to mix evenly for foliar spray. At the same time, we can also go to the root irrigation treatment, when irrigating the roots, we can use chlorbromoisocyanuric acid, 30 catties of water plus 30 grams of chlorobromoisocyanuric acid, or use this streptomycin plus mesomycin to irrigate the roots.

The above is the prevention and control method of tomato bacterial wilt, farmers and friends must be divided into situations to prevent and control when they see the plant wilting, first find the first time, and then find the prevention and control method. In the prevention and control of tomato bacterial wilt, leaf spraying is carried out at the same time as the root irrigation, so that the bacterial wilt can minimize the spread of pathogenic bacteria and minimize this loss.

Characteristics of tomato bacterial wilt:

In the process of growing tomatoes, many farmers have found that when the tomato plant grows to 30 cm to 40 cm, the upper leaves will wilt, then the lower leaves will wilt again, and the middle leaves will finally wilt. This is especially common in early spring stubble and over-summer planting.

At the beginning of the disease, the plants wilt during the day and recover after the evening, but tomato wilt occurs quickly and occurs for a short time.

Tomato wilt control methods:

Agricultural control. Strengthen field management: select high and dry land, sow early in a timely manner, advocate nutrient bowl seedlings, reduce root damage, high furrow and deep ditch, reasonable dense planting, timely ditch drainage after rain, prevent water accumulation, appropriately increase nitrogen fertilizer and potassium fertilizer, pay attention to cultivating technology and adjust soil acidity, timely remove diseased old leaves, and increase field ventilation and light transmission.

Clean the garden: remove the diseased plants in time, and fill the sick holes with 20% lime water for disinfection. After harvesting, the diseased residues are removed, and the fields are taken out of the field to be buried or burned, and the soil is turned deep to accelerate the decay and decomposition of the diseased residues.

Biocontrol. At the beginning of the disease, spray 600-800 times of 3% Zhongshengmycin, or 4000 times of 72% streptomycin sulfate soluble powder, or 300 billion grams of Pseudobacillus fluorescens powder 6500 grams of preparation of hectares of root irrigation, or 1 billion efu grams of Bacillus polymyx, 680 grams of preparation per mu diluted after root irrigation.

Chemical control. In the early stage of the disease, start watering the roots, every 7-10 days to use the medicine, each plant watering 200-250 grams, 1-2 times in a row, serious disease field according to the development of the disease, if necessary, to increase the number of medication. High-efficiency, low-toxicity, low-residue prevention and control drugs

Copper thiamycetes, spring raymycin and other roots can be used.

Conventional prevention and control drugs: new phytomycin, agricultural streptomycin, downy mildew and other root control.

The specific dosage and multiple of pesticides must be determined according to the degree of crop disease damage and the instructions for the use of each pesticide variety.

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The main measures to control tomato bacterial wilt include:

First, variety selection.

Select bacterial wilt resistant varieties, such as Zayou No. 1, Zayou No. 3, Kangqing 19, Hongkang No. 1, Hongkang No. 2, Hunan Tomato No. 1, Xiang Tomato No. 2, Qiuxing, Xiangyin, etc., which can be selected according to the specific conditions of the agricultural season.

Second, agricultural prevention and control.

Crop rotation. Implement rotation with cruciferous or grassaceous crops for more than 4 years, and it is best to carry out water-upland rotation with grasses. Soil testing and fertilization.

If conditions permit, it can be combined with land preparation to adjust the soil pH, and quicklime can be used to adjust the soil pH to more than 7. Rational application of nitrogen fertilizer, increase potassium fertilizer, and apply fully decomposed organic fertilizer or plant ash. Cultivating strong seedlings.

Choose disease-free land to raise seedlings, and grafting can be used to prevent disease in severely diseased plots; Adopt high furrow cultivation to avoid flood irrigation. Remove the diseased plants and burn them in time, and then sprinkle quicklime on the diseased holes for disinfection.

Third, biological control.

Bacterial wilt antagonistic antibacterial rice A-7 and NOE-104 were used to soak the roots of large seedlings before planting.

Fourth, chemical control.

At the beginning of the disease, the roots were irrigated with 4000 times of streptomycin sulfate or 72% agricultural streptomycin sulfate soluble powder, 500 times of 25% copper ammonia aqueous solution, and 400 500 times of 77% copper hydroxide wettable particle powder, and each plant was filled with diluted liquid liters, once every 10 days, and irrigated 2 3 times continuously.

The following measures should be taken to prevent and control grape anthracnose:

1) Do a good job in clearing the garden.

Combined with pruning to remove the secondary shoots, spikes, stiff fruits, tendrils, etc. left on the plant, and completely remove the fruit spikes, residual vines, dead leaves, etc. that fall on the ground, and burn them intensively to reduce the pathogens in the orchard.

2) Strengthen cultivation management.

During the growth period, it is necessary to pluck the tops and tie the vines in time, so that the orchard is well ventilated and transmitted, so as to reduce the onset of disease. At the same time, it is necessary to remove the secondary shoots in time to prevent the canopy from being too canopy, and create an environment that is not conducive to the occurrence and spread of diseases. Pay attention to reasonable fertilization, nitrogen, phosphorus, potassium three elements should be properly matched, to increase potassium fertilizer, to improve the disease resistance of plants.

After the rain, it is necessary to do a good job in the drainage of the orchard to prevent water accumulation in the garden.

3) Spraying protection.

From the discovery of conidia in the garden, to the first half month of harvest, spray once every 15 days, spray 1 Bordeaux liquid, and spray 3 5 times in a row. Focus on protecting the fruit. It can also be sprayed in rotation with 80% mancozeb wettable powder or 75% chlorothalonil wettable powder 500 800 times liquid, 50% carbendazim wettable powder 600 times liquid, 70% thiophanate-methyl wettable powder 600 times liquid; During the critical period after rain, 25% azoxystrobin suspension can be sprayed 2000 times, or 10% difenoconazole water-dispersible granules 1500 2000 times, and 50% carbendazim wettable powder, 70% thiophanate-methyl wettable powder, Bordeaux liquid, etc. can be used alternately.

1. Reasonable crop rotation, timely disinfection of the soil, sprinkling ammonium bicarbonate on the surface, spraying a new high-fat film to protect the fertilizer effect, and then covering it with a film; Select varieties resistant to bacterial wilt, and at the same time can use grafting to raise seedlings, cultivate disease-free and strong seedlings, improve plant disease resistance, and use new high-fat film seed dressing before seedling breeding to repel underground diseases and insects, isolate virus infection, do not affect germination and swelling function, strengthen respiratory intensity, and improve seed germination rate.

2. Strengthen field management, and irrigate with small water frequently to prevent flood irrigation. Apply sufficient basal fertilizer, apply organic fertilizer to be fully decomposed, and balance the top application of nitrogen, phosphorus, potassium mixed fertilizer, timely spraying to promote the growth of the main shoot, promote the flower bud differentiation; And timely cultivation, soil cultivation, and promote root growth. Spraying potassium dihydrogen phosphate and vegetable fruit Zhuang Tiling increased the amount of nutrient delivery, improved the fruit setting rate, and made the tomato yield stable and high-quality.

3. Pesticide prevention and control, if the diseased plants are found, they should be pulled out in time, and taken out of the vegetable field to be buried or burned, lime should be sprinkled on the soil around the diseased plants, and the whole garden should be sprayed with a new high-fat film 800 times to prevent the spread of the disease. At the same time, according to the requirements of plant protection, the disease hole is disinfected with 20% lime water, and 72% agricultural streptomycin soluble powder 500 times liquid is sprayed for prevention and control, once every 7 10 days, 3 4 times in a row, and sprayed with 800 times of new high-lipid film to enhance the efficacy and consolidate the control effect.