How to solve the problem of rotten sweet potatoes in continuous planting?

There are many reasons for the continuous cultivation of sweet potatoes, mainly caused by accumulated viruses, root nematodes, and nutrient deficiency. The solution is as follows:

1. Select detoxified sweet potato seedlings, sweet potato seedling detoxification technology is the main means to solve the sweet potato virus.

2. Detoxified seedlings solve the virus problem of the seedlings themselves, and there are viruses in the ground, so it is best if they can be replaced with new land that has not been planted with sweet potatoes to plant detoxified sweet potato seedlings. The advantages of detoxification vaccines can be fully reflected. Generally, the yield is increased by more than 30%, and the highest yield increase can reach 200%.

3. If there is no condition to change the land, it must be replanted, and a series of treatments are needed to reduce the phenomenon of rotten potatoes. The specific treatment method is to treat the soil with insecticides and fungicides, reduce the base of pests and diseases in the soil, use special fertilizer for sweet potatoes, and increase the application of trace elements.

Increase the application of organic fertilizer and trim microbial agent to increase the number of beneficial bacteria in the soil and reduce the number of harmful bacteria.

Then don't grow sweet potatoes in the same plot in a row! Just plant it in a different place! If you find this inspiring, please click on the "...."Click again" and "two words!"

Land exchange, which must be replanted, requires a series of treatments, which can reduce the phenomenon of rotten potatoes. The specific treatment method is to treat the soil with insecticides and fungicides, reduce the base of pests and diseases in the soil, use sweet potato special fertilizer, increase the application of trace elements, increase the application of organic fertilizer and bacterial fertilizer, increase the number of beneficial bacteria in the soil, and reduce the number of harmful bacteria.

Hello, dear, I am glad to do what to do if your sweet potato seedling seed potatoes have been found to rot You can take the use of chemical spray or root irrigation, which is the first choice of most growers, when root rot appears in the field, it is necessary to timely go to the pesticide to prevent and control sweet potato root rot, for sweet potato root rot, can be used difenoconazole, propiconazole, carbendazim, formabi, thiamethoxine + oxaconazole, formanine + oxaquin, etc., different dosage forms, use methods are also different, such as emulsifiable concentrate dosage form is used to spray, and wettable powder is used to irrigate roots and so on. To increase the number and diversity of beneficial microorganisms in the soil with fertilizers containing probiotics, consider using chemical fungicides**. Please note, however, that before using any chemical, read the instructions on the label carefully and use them correctly as directed.

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The reason for the rotting of sweet potatoes during storage is due to the infection of pathogenic bacteria, and the types of pathogenic bacteria are mainly as follows:

Parasitic pathogens such as black spot pathogen are the main diseases of rotten potatoes during storage, and there are three main routes of transmission, namely potato seedlings, potato tubers and soil.

2.Semi-dead parasites, such as soft rot bacteria, generally do not infect healthy parasitic tissues with strong vitality, and are easy to invade when potato pieces are broken or affected by cold damage and their vitality is reduced. After getting sick, the tuber becomes soft, watery and sticky, and many filaments and black spores grow on the surface of the tuber.

3.Nematodes occur in all potato areas in the north and south of China, and the tubers parasitized by stem nematodes have internal tissues that become black and white loose flower pulps, that is, the so-called chaff core. All parts of sweet potato, diseased residues and soil can be transmitted, generally can overwinter in the soil, diseased potatoes are all infected in the field, the more harmful ones have rotted at the time of harvest, and the milder ones have rotted during storage.

Sweet potato storage method:

Well cellar storage. Choose a place with high terrain, solid soil and low groundwater level, and dig a wellbore downward, generally about 1 meter in diameter, and 5 6 meters deep in the well. The size of the storage room can be determined according to the amount of storage.

In the storage room, 10-15 cm thick dry sand should be padded, on which sweet potatoes are placed. Qingming noisy sweet potatoes can only be filled with seventy percent, so that they can be left to serve a place for ventilation, otherwise they will rot aggravated by humidity and heat.

2.Cellar storage.

Generally, dig a cellar about 2 meters wide, 3 4 meters long, and about 2 meters deep. Stack the sweet potatoes from the bottom up one by one, and avoid direct contact between the sweet potatoes and the cellar wall.

3.Cellar storage.

The structure of the cellar is similar to that of ordinary houses, but the walls and roof are thick, sealed on all sides, the windows are open, and there are fire channels for heating, which can be treated with high temperature callus. There are two types of cellars: large cellars (storage of 15,000 kilograms) and cottage cellars. The cellar body of the hut cellar is small, labor-saving and material-saving, suitable for farmers' storage, generally each cellar can store 1500 3000 kg.

4.Indoor storage method.

Sweet potatoes are afraid of cold, and when the temperature is too low, they will be frozen, forming a hard core, which is not cooked or boiled; If the temperature is too high, it will sprout again, and it is best to control the room temperature at about 15. Sweet potatoes are damp and can easily cause germs to attack and cause rot, so it is best to store them in a breathable wooden box. If there is no wooden box, a wooden board should be lined up in the place where the sweet potatoes are stacked and against the wall, and something should be covered on the potato pile to prevent moisture.

In the warm day, it is necessary to open the window appropriately for ventilation to keep the indoor air fresh, and to prevent cold air from blowing in. Sweet potatoes bought from the market are best left in the sun for a few hours to reduce the moisture of the wound and promote healing.

5.Dried slices for preservation.

Slice the sweet potatoes and dry them on the house or in a sunny, dry and ventilated place. Be careful not to be exposed to rain or snow. After drying, store it in a dry place indoors and soak it in water before eating.

The soil is bacterial! Rotation! Rotate with other crops!