How to prevent and control tomato soft rot, and what medicine is used to prevent and control tomato

The main measures to control tomato soft rot include:

First, seed treatment.

Choose disease-free seeds, or soak them in 55 warm water for 20 minutes to sterilize.

Second, agricultural prevention and control.

Strengthen fertilizer and water management, avoid the use of unrotted fertilizers, and prune and prune in time; Choose to manage plants in good weather to promote wound healing as soon as possible, avoid pruning in rainy days or before the dew dries, and clean up and destroy diseased fruits and plants in time; Timely control of fruit boring pests and reduce insect damage.

Third, chemical control.

At the beginning of the disease, spray 4000 times of 72% agricultural streptomycin sulfate soluble powder, 500 times of 77% copper hydroxide wettable powder, 500 times of 25% copper ammonia aqueous solution, or 500 times of 500 times of copper succinate wettable powder, spray 1 time in 8 10 days, and spray 2 3 times in a row.

Soft rot, a bacterial disease, only harms the fruit, the initial stage of the diseased fruit produces water-soaked lesions, the result of the meat rots and has a foul smell, the loss of water dry and hangs on the branches. The fungus overwinters in the soil with the diseased residues and spreads through the fields with rain and irrigation water.

Do a good job of cleaning up the last crop when pulling seedlings. In the early stage of the disease, it can be killed with agricultural streptomycin in biomycin, thiazole copper, quinoline copper, leaf dry azole, chlorobromide isocyanuric acid. Wait for alternate medication for 4-5 days and hit 3 times in a row.

What medicine is used to prevent tomato soft rot? Hello! Hit:

Tomato soft rot is cautious and blind, and the disease caused by bacterial infection is treated with mesomycin, or allicin, or polyantimycin, or agricultural streptomycin, or occultamine acetate, or chlorbromoisocyanurate, or spring thunder king copper, or thiobium copper, or thiasen copper, or quinoline copper, or copper hydroxide, or cuprous oxide, or oxyxiaosheng copper chloride, or methyl frost copper, or copper cytenoate, or copper pine sinate, etc.

Abstract Tomato rot is mainly water-immersed, dark green, lesion diameter 1 2 cm, can expand to small half of the fruit in severe cases, and soon turn dark brown or black.

How to prevent tomato fruit rot disease?

Tomato rot is mainly water-soaked, dark green, with lesions 1 2 cm in diameter, which can expand to a small half of the fruit in severe cases, and soon turn dark brown or black.

Prevention and control methods: Cover with plastic film, keep the soil moist, spray 500 times of "Umbilical Rot King" or calcium chloride plus 5 ml of naphthalene acetic acid or Green Fenwei No. 3. Other notes include:

1) Choose disease-resistant varieties: such as Qiguo, Changchun No. 1, L 402 and other varieties are more disease-resistant. (2) Watering at the right time

Moisture must be balanced**. In particular, it is necessary to pay attention to the balance of moisture during the fruiting period**, and cover wheat straw between the rows after planting in arid areas to reduce water evaporation. Field watering is easy to do in the morning or evening.

In areas prone to umbilical rot, water control should be appropriate during the fruit expansion period. In drought years, water control can be terminated early. (3) Improving the soil:

Tomatoes should be planted on plots with strong water retention capacity and deep soil layer, and organic fertilizer should be added, which is conducive to the absorption of calcium in the soil. (4) Strengthen cultivation management: after flowering and fruiting, remove dead flower stems and diseased fruits in time, and properly prune and thin leaves, reduce plant water transpiration, real-time topping, and promote the transfer of calcium to fruits.

5) Reasonable fertilization: mainly organic fertilizer, combined with the application of superphosphate in land preparation, to avoid excessive nitrogen fertilizer, top dressing outside the roots, when the first spike flower bears fruit, spray calcium chloride or green Fenwei No. 3 with five parts per million naphthalene acetic acid, once in about 10 days, spray 3-5 times.

1. Planting in a timely period to improve root activity, the main planting of large-fruited varieties to 8 9 leaf seedlings bud colonization is good, too small is not conducive to flowering and fruit setting, too large will affect the root growth, planting before late November is more reasonable, too late is easy to encounter continuous low temperature after planting, causing root rot.

2. Strengthen heat preservation and prevent the root system from freezing, in addition to the application of 6 8s multi-functional film in the outer shed, in January and February, it is necessary to cover 2 layers of 3S multi-functional film in the shed and ensure tight coverage at night. In the survey in mid-November, it was also found that the heat preservation conditions of the fields with severe root rot were poor, which led to the freezing of the root system and created conditions for the infection of the pathogen.

3. Generally speaking, compared with the original conventional varieties, the growth potential, cold tolerance and moisture resistance of the current varieties have been significantly improved.

Root rot is a disease that many crops will encounter during the growth process, because it mainly appears in the roots of crops, it will cause root rot, so it is called "root rot", which has a greater impact on plants after the onset of the disease, and will affect the absorption of water and nutrients by crops, and eventually die. Tomato root rot is relatively common, and many growers are looking for a specific drug for tomato root rot, and Oasis believes that early prevention and control is key.

Tomato root rot

Tomato root rot is a common fungal disease that often occurs after the tomato colonization period. In the early stage of the disease, the lateral roots and thin heels rot and fall off, the taproot gradually turns brown, and small brown spots appear on the surface, and the roots are swollen and thickened in the later stage, the rhizomes of the plant become brown and rot, and the aboveground parts appear to have symptoms such as poor growth, yellowing of leaves, wilting, etc., and the serious disease will lead to the direct death of tomato plants.

Tomato root rot is not easy to detect at the beginning because it mainly appears in the roots of crops, and it is the best time to control it when the crops are wilted and yellow.

Causes

Root rot tends to appear in March to April, when the tomato is planted and the root rot pathogen begins to spread and attack, and when several conditions are met, root rot will appear

Excessive humidity: When there is too much rain in spring and summer, if the park is in a depression and has poor drainage, it will cause root rot;

Improper management: the appearance of root rot has a great relationship with the soil, if there is soil compaction, the soil is not well ventilated, and root rot will also occur;

Root damage: The pathogen of root rot is easily transmitted from the wound of the tomato root, so when the root system is damaged, it is easy to develop root rot, and most of the root damage is related to insect pests.

Prevention and control methods

How to prevent tomato root rot? The initial work is crucial, because once the tomato roots have rotted in the later stages, it is more difficult to control them.

Because tomato root rot tends to appear after the planting period, there are several things that need to be done before planting:

Choose high-quality varieties, high-quality tomato varieties can resist diseases and increase yields;

Improve soil conditions: Before planting, use Oasis with roots and seedlings or root song microbial agents with organic fertilizer to adjust the soil to prevent soil-borne diseases and soil compaction, and at the same time reduce the harm caused by root-knot nematodes.

Do a good job in water and fertilizer management: After tomato planting, timely application of Oasis balanced water-soluble fertilizer can improve the stress resistance of tomatoes, accelerate the transfer of nutrients, and reduce the probability of diseases.

When root rot has appeared, it can be treated with methamethaline or copper preparations.

Tomato root rot has become one of the main diseases of tomato in winter and spring greenhouses, mainly harming tomato roots, at the beginning of the disease in the taproot and stem base to produce brown spots, and then gradually expand the depression, in severe cases, the taproot turns brown and rots, resulting in the gradual withering of the aboveground part. According to the inducing conditions of the disease, the comprehensive control measures of agricultural prevention and control, supplemented by pharmaceutical control, can effectively control the occurrence and epidemic of the disease.

Relatively speaking, the incidence of root rot was the lowest in the two varieties of Pink Anna and Jinpeng, and the growth was normal at low temperature. Planting the large-fruited varieties that are currently the main ones are planted in a timely manner.

8 9 leaf seedlings are planted as well as flower buds, seedlings.

Too small is not conducive to flowering and fruit setting, and seedlings are too large.

Affects root growth. Time in November.

It is more reasonable to plant before the second half of the year, and if the planting is too late and encounters continuous low temperature, it is easy to cause root rot.

In addition to covering the outer shed with 6 8s multi-functional film insulation, in January and February, 2 layers of 3S multi-functional film should be added to the greenhouse for wintering, and it will be closely covered at night.

Fertilizer and water management controls basal fertilizer and reasonable top dressing. Base fertilizer is generally 50 kg of 45 ternary compound fertilizer per mu plus 1000 kg of well-rotted organic fertilizer. Top dressing at the peak fruit stage, use 5 10 kg of urea per mu each time.

The pre-control is to properly control the water after the designated live trees are planted to ensure the robustness of the branches and leaves and the development of the root system, and strengthen the fertilizer and water in the later stage to ensure a good yield.

When the field is planted with drug control and continuous cropping, 40 ethylphosphine aluminum-manganese-zinc 200 400 times solution is used as the water for planting live trees; After continuous low temperature and rain, the roots were irrigated with 700 1000 times of methamethal, and 50 100 grams of liquid were poured for each plant; At the initial stage of root rot, the roots were irrigated with 700 800 times of nonglilai, and 100 150 grams of liquid was watered per plant.

The pathogenesis of tomato root rot is characterized by the genus Semi-Knowing Bacteria subphylum fungi. The pathogen overwinters in the soil and can survive for 5 to 6 years. Transmission in seedbeds is mainly carried by soil, fertilizers, farming tools and watering.

Germs invade from seedling wounds. Then it spreads by wind and watering. High temperature and high humidity are the key to the occurrence and epidemic of this disease.

The disease is more severe in the plots with continuous stubble in the seedbed, water on the ground, application of unrotted fertilizer, many underground pests, and many root wounds caused by agricultural activities. The seedbed can be watered with 400 600 times of Pulik water agent (2 3 kg per square meter); Or soak the seedling roots with 400 600 times of Pulik water agent before transplanting, or irrigate the roots with 400 600 times of Pulik water agent after transplanting.

Apply bacterial fertilizer and organic fertilizer to improve the soil and solve the problem thoroughly.

(1) If the soilless cultivation is cultivated, the nutrient solution should be replaced in time.

2) When cultivating in the shed or in the open field, apply compost made of Japanese enzyme bacteria or Lvfeng biological fertilizer 50 80kg 677m2, apply hole, reduce the amount of chemical fertilizer, and reduce the incidence of disease.

3) Tomatoes cultivated in the field should be rotated for more than 2 to 3 years, and continuous cropping should be avoided to avoid the accumulation of bacterial sources.

First of all, avoid using unrotted livestock and poultry manure and excessive one-time chemical fertilizer in fertilization. The second is to increase the application of biological bacterial fertilizer to promote the development of the root system, loosen the soil, which is conducive to the root system, and at the same time reduce the number of harmful bacteria by antagonizing the harmful bacteria by beneficial bacteria. Third, pesticide control, before transplanting, dip the roots with azoxystrobin (amisida) or methalen manganese zinc (Jinlei, Radomir manganese zinc), and spray transplanting holes.

After the third spike fruit sits, the vegetables are overharvested (produced in Qinhuangdao, Hebei) 600 times, 600 times methalene, manganese zinc, and 600 times methyl tobuzin. In the early stage of the disease, this method is still followed. If the disease is severe, the tree will be buried in the soil and watered, and the adventitious roots will continue to grow.

Irrigate the roots with 1000 times of allicin.

Root rot is one of the devastating diseases of the Cymbidium grandiflora. C. grandiflora is susceptible to infection during any growth period, and the fungus hyphae infect the roots of the plant and cause rot. When seedlings are infected, a brown rot zone will form around the base of the plant, causing the seedling to wilt and cause the plant to die.

When the adult plant is infected, the growth is weakened, and in severe cases, it will be further impregnated with pseudocorms and leaves, and the leaves will be yellow, thin, twisted, and shrunk, and eventually die.

Control methods: root rot can be used to irrigate roots, flushing, drip irrigation, irrigation root dilution 1000-1500 times, flushing, drip irrigation dilution 300-600 times, field crops recommended spraying, root spraying.

Root rot, buying bucket heavy stubble can be solved, ** there are, I think it's okay, you can also try it.

Root rot mainly harms fruit trees, vegetables, flowers, crops, etc., and is mainly caused by bacteria such as Pythium, Phytophthora, Rhizoctonium, Rhizocon and Bacillus Euclidean. The pathogen overwinters in the soil and on diseased remains, and generally occurs from late March to early April, and enters the peak period of disease in May. In recent years, the degree of harm has been continuously strengthened, the prevention and control is difficult, and the rate is high, which directly affects the economic benefits of farmers.

The main symptoms of root rot are: leaf edge scorching, new shoot capping, leaf wilting, leaf green dryness, etc., which are easy to develop under high temperature and high humidity conditions in summer, so it is necessary to do a good job in prevention and control.

1. Reasonable water and fertilizer management of the soil to prevent flood irrigation and water accumulation after rain.

2. When the disease occurs, the number of root topdressing should be appropriately increased. When the disease is mild, the soil around the roots can be dug up to dry, and plant ash and farm fertilizer can be added to the landfill. When the disease is severe, the diseased roots should be cut off and the roots of the diseased plants should be watered with 1000 times of the general tree protection solution.

3. Timely prevention and control of underground pests and nematodes.

Tomato because of soft rot caused by fruit rot, seriously affecting the quality and yield, tomato soft rot is a disease caused by bacterial infection, ** This symptom can be used atropine, Chinese bacteria and other drugs, the main thing is to strengthen the daily field control management. In order to prevent tomato soft rot, the maintenance and management of tomato fields can be strengthened, and reasonable crop rotation should be carried out with crops that are not Solanaceae for more than three years to reduce the number of bacterial sources in the soil.

Tomatoes because of soft rot causes fruit rot, seriously affecting the quality and yield, tomato soft rot is a disease caused by bacterial infection, ** This symptom can be reported with atropine, mesobiotics and other drugs, mainly to strengthen the daily field control management.

Tomato soft rot causes.

Tomato soft rot is mainly caused by wounds or cracks on the surface of tomatoes, and the bacteria invade the inside of the fruit through surface damage, resulting in fruit lesions, or because of high temperature and humidity, poor air circulation, resulting in soft rot and rot of tomatoes.

Tomato soft rot control.

Strengthen the conservation and management of tomato fields, reasonable crop rotation, and more than three years of crop rotation with crops that are not Solanaceae to reduce the number of bacterial sources in the soil.

The selection of disease-resistant varieties of tomatoes, strict control of seedling level, disinfection of seeds, especially the introduction of seeds need to be sterilized, so as to achieve the prevention and control of tomato soft rot.