Melon root rot control, melon root rot control methods

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.

Prevention and control methods: 1. Implement crop rotation for more than 3 years with non-melon vegetables such as cruciferous and lily in seriously diseased areas.

2. Apply fully decomposed base fertilizer, prepare the land finely, and use high furrow cultivation. Prevent flooding and avoid water accumulation in the field after rain. Pay attention to the prevention and control of underground pests. Loosen the soil in time after the onset of the disease to enhance the soil permeability.

3. At the beginning of the disease, spray or water 500 times of 50% carbendazim wettable powder, or 1000 times of 45% Tekeduo suspension, or 1500 times of 25% dichloride demulsified oil, or 1000 times of 65% multiguodine wettable powder, and water 150 300ml of liquid medicine per plant.

It occurs in the early and late stages of crops, and is generally more serious after the melon is set later, and the root can generally be irrigated with root disease and pathogens. We use it on watermelons and peppers from Henan and Liaoning with great results.

<> seriously ill areas can be rotated for more than 3 years with non-melon vegetables such as Shizexun and Liliaceae; Apply rotting and ripe base fertilizer to prevent water accumulation and underground pests after rain, and loosen the soil in time after the onset of the disease; At the beginning of the disease, you can spray or water 500 times of 50% carbendazim wettable powder, or 1000 times of 45% Tekeduo suspension, or 1500 times of 25% dichloride demulsified oil, or 1000 times of 65% Duoguoding wettable powder, and 150-300ml of sunbendin wettable powder per plant.

Melon is not only a common fruit and vegetable, but also an important fruit in midsummer; It has the effects of anti-inflammatory and detoxification, vomiting and yellowing. However, in the process of melon cultivation, the damage of pests and diseases is also very serious. How to control melon root rot? The following will introduce the prevention and control methods of melon root rot.

Symptoms of melon root rotshape

The disease mainly infects roots and rhizomes, and the site of infection is first water-stained, followed by yellow-brown necrosis and rot. When the humidity is high, white mold is produced on the surface of the rhizome, and the vascular bundles at the site of decay turn brown but develop upward, unlike Fusarium wilt. With the development of the disease, the diseased part shrinks and thins slightly, and the leaves of the plant or seedling gradually turn green, wilt and die from bottom to top.

In later stages, all lesions decay, leaving only filamentous vascular tissue.

Pathogenic conditions for melon root rot

Pathogens overwinter in soil and diseased bodies with spores, mycelium, or sclerotia. Atsugaki spores can survive in soil for 5 to 10 years. Chlamydia is the main source of infection.

Bacteria invade from root wounds. After the disease occurs, conidia are produced at the affected location, which is spread by rainfall or watering, and repeated infections occur. High temperature and humidity are conducive to diseases, continuous cropping, low-lying, high soil viscosity, serious underground pests, or the application of immature root fertilizer.

Prevention and control methods of melon root rot

Melons with serious root rot, especially melon greenhouses that have been planted for more than 5 years, should be rotated with non-melon vegetables for more than 3 years.

The application of rotting base fertilizer, fine land preparation, and high furrow cultivation bracelet; To prevent flooding, drip irrigation is recommended if conditions permit; Pay attention to underground pest control. Loosen the soil in time after the occurrence of disease to improve soil permeability.

Chemoprevention and control

The time and place should be known so that prevention can be carried out in advance. Dip the roots before planting, dip the roots first, and then plant the roots. Soak the roots with 1,000x silex + 300x pridenfish protein; For melon sheds where root rot is occurring, watering should be reduced and should be watered 1 2 times in a row.

In the process of root irrigation, it is necessary to grasp the sufficient amount of medicine and the location of the drug. Use a bamboo pole to prick the eyes at the roots first, and then rinse the roots to prevent the loss of the potion. The drug can be 1500 times that of refined methylpyrrolidine and 500 times that of pridenfish protein, and each tree can be filled with 300 ml of the drug; It can also be added 500 times 50% carbendazim wettable powder, 1000 times 45% Tector suspension or 1500 times 25% Dili emulsified oil.

At the same time, 500 times more pridenfish protein can be added. Each plant can be filled with 300ml of medicinal solution, and then re-irrigate after 7 days, the effect is very good.

To remove pests and diseases in the soil, spray some pesticides, strengthen field management, timely ventilation, and timely top dressing.

It can be prevented by pesticides, and the varieties that are suitable for planting are selected to be planted in a timely manner, and the soil must be treated in advance, and the scientific methods of management are carried out in advance, and the disinfection of the land needs to be paid attention to.

Once such a situation occurs, the buried liquid should ensure the fertility of the bent soil in time, and also need timely watering and fertilization, as well as to do a good job of insect pest control, to choose the right insecticide, also need to do a good job of drainage, and this grandson is to pay attention to the temperature of planting.

Root rot. Prevention and control methods:

1. Selected varieties: select and prepare the seedling plots. High-quality varieties were selected, and the seeds were soaked and treated with seed coating agent, and sown at the appropriate time.

2. Seedbed disinfection: Seedbed disinfection should be carried out 1 month before seedling, and 98% Langxin microgranules can be used, and the dosage is 15 20 kg per mu. First of all, clean up the diseased residues of the seedbed, and then water thoroughly (if the soil is moist, you can not water), so that all kinds of microorganisms in the soil can fully germinate and activate, break the dormant state, wait for the soil to dry slightly, plough the land, plough more than 20 cm, and loosen and level the soil.

3. Strengthen seedbed management: strengthen seedbed management, pay attention to loosening soil, increase soil permeability, avoid flood irrigation, ensure that there is no water to root the roots, and apply foot fertilizer. Control the temperature of the seedbed, keep it at 25 30 during the day and 10 15 at night to prevent the invasion of low temperatures.

4. Pharmaceutical prevention and control: the seedbed can be irrigated with 400 600 times of 84% Pulik water agent (2 3 kg of chemical solution per square meter); Or soak the seedlings with 400 600 times of 84% Pulik water agent before transplanting, or irrigate the roots with 400 600 times of 84% Pulik water agent after transplanting. In the early stage of the disease, the pesticide prevention and control should be sprayed with 50% carbendazim wettable powder 400 times or 50% dixone 800 times.

There are three main methods of root rot prevention and control, the first agricultural prevention and control is mainly to do a good job in seedbed management and control of sprinkling. After sowing, the soil should not be too thick, and the moisture of the soil should be determined according to the weather conditions when sprinkling, and the amount of water should not be too much. The second is physical control.

Soak the seeds in warm water at about 55 degrees Celsius for about 10 minutes. There is also the direct use of pesticides to prevent and control. For example, if the seedlings are growing, then you can directly use wettable powder to irrigate the roots, and if there is already a disease, you can use 1500 300 times to irrigate the roots at this time.

2. Disinfection method.

Seed and soil disinfection method, seed disinfection can directly use warm water at 55 degrees Celsius, and then soak the seeds for about 5 minutes, and then put it directly into cold water to cool, so that it can be well germinated and sown. You can also soak the seeds in cold water for about 10 hours, and then soak them in the copper sulfate solution, about a few minutes, and then do some saltpeter lime and sow the seeds. Soil disinfection can be carried out directly by using Fumeishuang or Nahai, etc., and can be sprinkled directly into the soil.

Root rot mainly harms the roots, which is difficult to detect in the early stage, and once the symptoms of disease are shown on the ground, it is difficult to achieve the ideal control effect. You can dip the root with 50 times the solution of Bacillus subtilis wettable powder, and then colonize. It can also be used after soil disinfection, using well-rotted farm fertilizer, Bacillus subtilis wettable powder 500 times, flushed with water, or added to drip irrigation solution to irrigate the roots, irrigated once every 15 days, irrigated 2 3 times.

There are many methods for the prevention and control of root rot, which can be controlled by soil disinfection and pesticide control, and root rot can also be prevented and controlled by simple agricultural stubble, application of fully rotted farm fertilizer, and reasonable irrigation.

1. Clean the garden in autumn, cut the diseased branches and burn them intensively to eliminate the pathogen.

2. It can be sprayed for prevention and control from March to August. In mid-May and early July, spray 1000 times of 38% oxathoxystrobin or 30% nail cream, 800 times of oxazine or 500 times of Fumeishuang solution on the susceptible varieties.

3. Drug sprayingDrug spraying requirements, drugs should be atomized spraying to solve the problem of pesticide residues, and fog machine spraying is usually used in the world.

4. In recent years, the increase of the disease has a lot to do with the poor disease resistance of some breeding materials and the change of cultivation conditions. Therefore, the selection of disease-resistant inbred lines and the cultivation of disease-resistant hybrids are the primary control measures.

5. The pathogens that cause stem rot are weak parasitic bacteria, which can infect plants with weak growth potential. Measures such as strengthening cultivation management, reasonable fertilization, reasonable dense planting, and reducing soil moisture can make plants robust and reduce stem rot.

6. Reasonable crop rotation, deep ploughing of the land, removal of disease and residue and non-application of unrotted organic fertilizer can reduce the source of bacteria in the field and achieve a certain control effect.

Stem rot is a serious disease that affects the basal branches of raspberry. It generally occurs on the new shoots, and a dark gray scald-like lesion appears near the ground from the sunny side of the new shoots, about centimeters long and centimeters wide.

Cucumber root rot can be controlled with medicine:

1. 10 days before the onset of the disease, spray or water 1000 times of 50% benfenazim wettable powder, or 800 times of 50% mancozeb wettable powder, or 1000 times of 70% thiophanate-methyl wettable powder, or 500-800 times of 50% carbendazim wettable powder, etc.

2. If the seedlings are found, they should be pulled out immediately, and sprayed with 800 times of 25% methamanine wettable powder, or 500 times of 64% alum wettable powder, or 600 times of 75% chlorothalonil wettable powder, or 200 times of 40% ethylphosphine aluminum wettable powder, or 69% anker manganese zinc 1000 times, or 70% mancozeb wettable powder 500 times, or 15% chlormonyl water 1000 times, etc.

Other prevention and control methods.

1. Reasonable crop rotation, selection of disease-resistant varieties, soaking with new high-fat film before sowing, and conditional rotation with cruciferous and lily crops for more than 3 years.

2. Implement high furrow or deep furrow and narrow furrow cultivation, and frequently clear the ditch and drain to reduce humidity. Strengthen the management of seedlings, after the emergence of seedlings, potassium permanganate plus new high-lipid film can be applied to prevent the occurrence of root rot at the seedling stage, and cooperate with the spraying of new high-lipid film to protect the growth of seedlings.

3. Strengthen management, timely irrigation, especially in the fruiting period, pay more attention to the balance of water**, and strictly prohibit dry and wet. In case of high temperature and drought during the flowering and fruiting period, it is necessary to water in time, and pay attention to drainage after rain in the rainy season to ensure the normal function of the root system.

To sum up, it is about the introduction of the use of cucumber root rot and its prevention and control, and it is very important to apply fertilizer and prevent pests and diseases in a timely manner in the usual planting management!

Prevention and control methods:1。Agricultural control.

Choose disease-resistant varieties, such as Zhongnong No. 5, Zhongnong No. 9, Chunxiang, Jinchun No. 3, etc. Cucumber seeds are sterilized with 50 warm water for 20 minutes, or 70 dry heat sterilized for 72 hours, and germination and sowing also have a certain effect. It is recommended to use cucumber seed coating No. 9-2, and the dosage is the amount of the active ingredient by the weight of the seeds), that is, 100 grams of seeds can be mixed in milliliters.

The seedbed should be selected in a plot that is sheltered from the wind and sun, and it is required to be conducive to drainage, adjust the temperature of the bed soil, and be conducive to lighting, and increase the ground temperature. If necessary, the nursery bed soil should be renewed, and fully decomposed organic fertilizer should be applied. The hot water circulating hotbed seedling method is adopted.

When the ground temperature drops below 20, start heating the water from the water inlet to supplement the temperature, or you can connect a gas stove or other heat source to make a hot water circulator (welded into an aluminum pot shape with an iron plate), the effect is better. After the emergence of seedlings, the temperature is cooled to facilitate the growth of seedlings, so that the incidence is less and the seedlings emerge quickly. After the seedlings are gathered, the temperature of the seedbed or shed should be kept at 25-30 during the day and 10-15 at night to prevent the invasion of cold currents.

The humidity of the seedbed or shed should not be too high, even if it is rainy or rainy or snowy or the bed soil is not dry, it should be watered less or not watered, and it must be watered with a watering can to avoid excessive humidity. When there are water droplets on the plastic film or glass and seedling leaves, it is necessary to ventilate or remove some plant ash in time to reduce the humidity. The non-drip film cover shed was selected to improve the light conditions and increase the light intensity, so as to facilitate photosynthesis and improve the disease resistance of seedlings.

Carbon dioxide fertilization technology or Huimanfeng multi-compound organic active liquid fertilizer was applied, 320 ml per mu (667 square meters), diluted 500 times, and sprayed twice.

2. Pharmaceutical prevention and control.

10 days before the onset of the disease, spray or water 50% benomyl wettable powder 1000 times, or 50% mancozeb wettable powder 800 times, or 70% thiophanate-methyl wettable powder 1000 times, or 50% carbendazim wettable powder 500-800 times, or 14% copper complex ammonia water 300 times, or 40% aluminum triethylphosphonate wettable powder 500 times, or 70% propylene zinc wettable powder 500-800 times, or 50% Fumei double wettable powder 500-800 times liquid.