Methods for controlling watermelon and melon stem base rot

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 raspberry basal branches. 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.

Symptoms: The base of the stem (rootstock part) of the plant produces water-stained dark brown lesions, and expands outward, and the severe lesions surround the melon stem, causing the stem base to shrink, and the melon vine and vegetative vine leaves wilt at high temperature, and finally the whole plant wilts and dies.

Pathogenesis: The disease is mainly harmful to watermelons and melons after planting fruit set, watering, the disease is more than 30, easy to occur under high temperature and high humidity conditions, and the disease is serious, after watering, it is easy to get sick when it encounters cloudy days, insufficient light, large temperature difference between day and night, and weak plant growth.

Prevention and control methods: 1. If it is found that the plants with water-stained lesions at the base of the ground stem, the roots can be irrigated by spraying the base of the stem with Ruimiaoqing and goldenzole; It is also possible to use 20% thiomyces copper 10 times solution plus a small amount of strong rooting agent or downy mildew 10 times solution to apply the diseased area, and at the same time spray amino acid foliar fertilizer to enhance plant resistance.

2. At the same time, pay attention to the use of small water to water frequently after setting melons to prevent flooding.

My melon leaves have different small squares on the stem base.

<> 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.

Summary. Hello! Provide you with four schemes (1) 10 ml of 25% azoxystrobin suspension + 20 ml of 60% Miaokang (Oxazole and downy mildew) water, mixed with 20 kg of water to irrigate the roots, 100 150 ml per plant, or mixed with 15 kg of water spray.

2) 5 grams of 99% dimethyl soluble powder + 20 ml of downy mildew hydrochloride aqueous solution, mixed with 20 kg of water to irrigate the roots, or mixed with 15 kg of water to spray.

3) 25 ml of fluorobacterial and downy mildew suspension + 20 grams of 50% chlorobromoisocyanuric acid wettable powder mixed with 20 kg of water to irrigate roots or sprayed with 15 kg of water.

4) "Rebirth" brand root disease special 1 + 1 (20 grams + 25 ml) + 25 grams of mold and mildew wettable powder mixed with 20 kg of water to irrigate roots or sprayed with 15 kg of water.

What medicine is used for watermelon stem rot.

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Hello! Provide you with four schemes: (1) 10 ml of 25% azoxystrobin suspension + 20 ml of 60% Miaokang (Evil, oxazole, downy mildew) water agent, mixed with 20 cm of spring hail and water to irrigate the roots, 100 150 ml per plant, or mixed with 15 kg of water spray. 2) 5 grams of 99% dimethyl soluble powder + 20 ml of downy mildew hydrochloride aqueous solution, mixed with 20 kg of water to irrigate the roots, or mixed with 15 kg of water to spray.

3) 25 ml of fluorobacteria, downy mildew suspension agent + 50% chlorobromoisocyanuric acid wettable Senxi powder 20 grams mixed with water 20 kg irrigated roots or sprayed with water 15 kg. 4) "Rebirth" brand root disease special 1 + 1 (20 grams + 25 ml) + 25 grams of mold and mildew wettable powder mixed with 20 kg of water to irrigate roots or sprayed with 15 kg of water.

The rotten stem is very serious, and there are many medicines that are best used to cure the roots as soon as possible.

Hello! Use option 3 or option 4 to cut off the root as soon as possible.

This medicine can be dispensed there.

Hello! It is sold in general pesticide stores, and it can be matched.

Thank you. You are welcome!

Summary. Hello, I think you can mix 15% mixed amino acids copper, zinc, manganese, magnesium aqueous agent 300-500 times and 50% chlorine isocyanuric acid soluble powder 15 family 00 times, natural brassinin emulsifiable concentrate 6000-10000 times, Kebao plant eugenics 1500-3000 times (transplanted crops, pesticide damage and fertilizer damage, strong roots and seedlings, and 1500 times used for controlling prosperity) mixed evenly foliar spray. 

Hello, I think you can mix 15% mixed amino acids copper, zinc, manganese, magnesium water rolling agent 300-500 times and 50% chlorine isocyanuric acid soluble powder 15 family 00 times, natural brassinin emulsifiable concentrate 6000-10000 times, Kebao plant eugenics 1500-3000 times (transplanting crops, pesticide damage and fertilizer damage, strong roots and seedlings, and controlling the use of 1500 times) to mix evenly foliar spray Zhiqing mist. Big Fierce Tung