What are the prevention and control methods for tomato bacterial wilt

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.

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 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.

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.

Web Links.

<> 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.

Yes, but tomato wilt should still be based on prevention, you can choose hormone-free water-soluble fertilizer, water-soluble fertilizer with good disease resistance for fertilization, and the soil can not be forgotten, flush with 2 billion microbial agents to improve.

When spring tomatoes are planted, the seedlings are generally older, and they are generally no longer watered during the period from the time of slow seedling watering to the first ear of fruit sitting.

The seedling age of summer and autumn tomato planting is small, after slowing the seedling, it is necessary to promote the rapid growth of seedlings, timely watering, and pay attention to cultivation after watering.

Flowering period of water control squatting seedlings, flowering rarely watered, unless the drought is serious, this period is mainly to keep the soil loose, the surface dry, promote strong seedlings, to ensure that the root system expands downward, for the future plant vigorous growth, lay a good foundation.

When the first ear of fruit sits 2-3, the fruit should be watered in time to promote the fruit.

Under the premise of applying enough organic bottom fertilizer to tomato, we must pay attention to the cooperation of the three elements when topdressing, we must pay attention to the topdressing of phosphate fertilizer and potassium fertilizer, control the use of nitrogen fertilizer, too much will make the plant grow, and you can use Yanwo potassium dihydrogen phosphate.

Possess "three seconds."

The advantages of "instant solubilization", the introduction of foreign dual technology, so that potassium dihydrogen phosphate can be better absorbed by tomatoes, and Yanwo potassium dihydrogen phosphate can also achieve a wang control effect.

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