What are the symptoms of potato rot? How should I deal with potato root rot?

Potato root rot disease often hurts potato seedlings, in the adult stage of potatoes can also be diseased, in the early stage of the disease is only some branches of roots and roots susceptible to disease, towards the development trend of the disease, will gradually expand to the main stem, after the main stem is susceptible, the initial plant does not show symptoms, and then accompanied by the potato ground part of the nutrient demand is very high, before and after the noon meal, when the light is strong and the water surface evaporates too much, the potato leaves will wither, and can recover at night. When the condition worsens, the wilting condition cannot be repaired at night, and eventually the potato plant dies.

The pathogenic bacteria of potato root rot disease often spend the winter in the soil in the residual body of the potato, often in mid to late March - early to mid April, and will enter the peak period of disease in May of each year, the disease situation is relatively related to the climatic conditions, and the ultra-low temperature and low temperature and light at the seedling stage often cause root rot disease. When potatoes are planted, if the soil is sticky, easy to agglomerate, and the ventilation is not good, it will often harm the development of potato rhizomes and the nutrient transport of potato rhizomes.

Farmers who are willing to reasonably prevent and control potato root rot diseases need to pay attention to effective crop rotation and improve cultivation techniques to immediately eliminate the residual disease body that removes the surface layer of the soil. And deep ploughing, meticulous ploughing, and high furrow cover subfilm planting. In the case of supervision, it is necessary to prohibit flood irrigation, prevent water storage in the field after rain, prevent and control underground pests, turn over the soil immediately after sprinkling, improve the soil permeability, create a disease-free seed land, and optimize the disease-free tubers to make seed potatoes, and improve the disease resistance characteristics of the plant itself.

To prevent potato root rot disease or in the field where potato root rot disease has occurred, it is necessary to irrigate the roots in time to eliminate the harmful bacteria in the soil, improve the organic matter content in the soil, balance the total number of microbial flora in the soil, maintain the rhizomes of potatoes, and let the potatoes grow and develop vigorously. To get rich potato farmers, it is necessary for farmers to attach great importance to the specific content of root rot diseases, immediately solve potato root rot diseases, and improve the production, sales and quality of potatoes.

Potato root rot will lead to the death of potato seedlings, so in order to prevent this phenomenon, it is necessary to observe the growth of seedlings in time. In the process of fertilization, do not put more or less.

The whole potato plant will turn yellow, and finally it will wilt and die, and after the potato plant shows symptoms, it is necessary to spray the crop immediately for effective control.

After the potato root rot, there will be anthracnose, which will cause the potato yield to be reduced, and if the potato root is rotten, we must spray pesticides in time.

Most of the root rot of potatoes is caused by root rot, in addition, when potatoes are planted, excessive rain, water accumulation in the field, heavy stubble and other reasons will induce this disease, so potatoes should pay attention to keep the soil moist before the emergence of seedlings, try not to accumulate water in the field, watering and hoeing in time after rain.

Prevention of potato root rot disease.

If you want to prevent potato root rot disease, you need farmers to avoid heavy planting, try to rotate planting with rice, corn, wheat, beans and other crops, and at the same time, when planting, we should select disease-free tubers as seed potatoes and pay attention to cultivating strong seedlings.

Before planting, farmers can use Bicagen Congcong seed dressing to strengthen the ability of heat preservation and moisture, improve the germination rate of potato seeds, and strengthen field management to repel underground pests and avoid root rot caused by pests.

Secondly, it is necessary to increase the application of organic fertilizer and potassium fertilizer in the potato field in a timely manner, pay attention to the foliar spraying of photosynthetic nutrient film fertilizer to improve the plant's own disease resistance, and use Bika microbial agent root boy to irrigate the roots or water with water to enhance the self-disease resistance of potatoes.

Points to note when fertilizing potatoes.

When fertilizing potatoes, it is not advisable to apply too much chlorine-containing fertilizer, mainly because when the concentration reaches a certain level, it will poison the root system of potatoes, reduce the content of potato starch and sugar, and affect the yield and quality of potatoes.

For potato fertilization, pay attention to the use of base fertilizer, you can choose fully decomposed farmhouse fertilizer, must be composted at high temperature to kill grass seeds and pathogenic bacteria, conditional compost aging for 1-2 months, the application of fertilizer should be 3-5 cm away from seed potatoes.

Potato leaves are infected and rhizomes rot, which is a lack of nutrients that leads to a decrease in resistance, and it is necessary to supplement potatoes with sufficient nutrients to prevent and control them.

1. Do a good job in seed treatment to prevent bacterial infection.

When cutting seeds, use root peptide seed dressing, sterilization king cutter sterilization or small potato whole potato sowing, if you find diseased potatoes, do not continue to use them, reduce the probability of seed potato infection; When sowing, reserve the machine passage to avoid wound invasion, and the humidity in the field should not be too large.

2. Do a good job of field inspection and pay attention to the inspection time.

The best time for growers to visit the field is in the afternoon on hot days, and it is better not to do it at the same time every day to find diseased plants.

3. Farming precautions.

After the bean tuber is found to be rotten, the diseased seedlings should be cut off in time and buried deep outside the field to prevent the spread of the virus. In the usual bean cultivation process, attention should be paid to timely cultivation, so as not to rot through the rain into the underground tubers, causing harm to the tubers. Strengthen drainage management, timely sowing, and ensure normal nutrient absorption.

At the same time, it is necessary to pay attention to the quality of the bean seed potato and cut off the source of disease from the seed potato.

In the early stage of the disease, it is necessary to prevent pests and diseases in time, apply fertilizer in time, and pay attention to the management of temperature and humidity.

It should be topdressed in time, but also pay attention to the amount of watering, but also to control the temperature, at the same time be sure to ventilate regularly, but also pay attention to the density of planting.

When planting, the seeds should be disinfected first, and fertile soil with good air permeability should also be selected when planting, and then water and fertilizer management should also be done during planting, and more potassium and nitrogen fertilizers should be applied

Seeds are sterilized before planting potatoes.

Scientific fertilization, prevention as the mainstay, comprehensive treatment.

Strengthen fertilizer and water management to reduce the occurrence of pests and diseases.

Potato leaves are infected with disease, and rhizome rot is disinfected and sterilized with carbendazim.

Choose a more fertile plot for planting, and plant it reasonably densely.

1. Most of the root rot of potatoes is caused by root rot, and when potatoes are planted, excessive rain, water accumulation in the field, heavy stubble and other reasons will induce this disease, so potatoes should pay attention to keeping the soil moist before emergence, try not to accumulate water in the field, watering and burying liquid and hoeing in time after rain.

2. If you want to prevent potato root rot disease, you need farmers to avoid heavy planting, try to plant in rotation with rice, buried corn, wheat, beans and other crops, and at the same time, when planting, we should select disease-free roots as seed potatoes and pay attention to cultivating strong seedlings. Before planting, farmers should also use new high-fat film seed dressing to strengthen the ability of heat preservation and moisture retention, improve the germination rate of potato seeds, and strengthen field management to avoid underground insect pests or avoid root rot caused by insect pests.

3. Secondly, it is necessary to increase organic fertilizer and potassium fertilizer in the potato field in a timely manner, pay attention to foliar spraying of photosynthetic nutrient film fertilizer to improve the plant's own disease resistance, and use microbial bacteria to fertilize the roots or irrigate with water to enhance the self-disease resistance of potatoes.

When planting potatoes, it is best to choose lead sources, select excellent varieties with strong disease resistance and high stress resistance, and do a good job of drying and dressing. Specifically, the seed potatoes are placed in the sun to dry to enhance the activity of the seed potatoes.

To a certain extent, it can kill the eggs of germs on the surface of seed potatoes. After drying, the seeds are sterilized with insecticide sterilizer (formiza or chlorpyrifos can be used) to enhance the disease resistance of seed potatoes.

Clause. 2. Strengthen field management.

Potato planting should not be repeated cropping, so as not to leave pathogenic bacteria in the soil, which will seriously endanger the growth of potatoes, and it is best to plant with soybeans, corn, wheat and other crops in reasonable rotation.

In addition, drainage should be carried out in time after irrigation after rain to avoid the problem of root rot caused by water accumulation in the field. Finally, the weed disease residues in the field were removed in time, the transmission route of the buried fungus was cut off, and the number of eggs of the fungus was greatly reduced.

1. Planting factors.

Failure to prepare for potato planting is an important reason. The main aspects are as follows: First of all, the cutting area of the root block is too large, and the seedlings after planting are too fragile and rot when they bear fruit. The second is that the cutting is not up to standard, and some potatoes do not have sprouts on them, and they cannot germinate after planting, which will also lead to rot.

That is, the seedlings are not well preserved when they are saved, and the environment is too humid, resulting in too much water and rotting during planting.

2. Environmental factors.

The regulation of manpower in this area is limited, but everyone must know how to regulate it. First of all, of course, there is the problem of moisture and humidity, potatoes are not suitable for too wet soils, which will cause the fruit to absorb too much water, break the skin, and cause rot. The second is the issue of temperature, everyone thinks that temperature has little effect on decay, but it is not.

The sultry environment formed by too high temperature can easily cause potatoes to breed some microorganisms to ferment, leading to rot. Therefore, everyone should do some measures for drainage and sun protection every day.

3. Disease factors.

Disease is a frequent factor that causes potato rot, because potatoes grow underground, so some underground pests are not easy to deal with, and it is easy to destroy the growth of potatoes and cause rot. The second is some diseases, such as ring rot, which start from the top of the potato fruit and corrode the skin and enter the interior by direct cracking. This aspect mainly depends on everyone's daily preventive measures, once you find any changes in the plants on the ground, you must pay attention.

4. Management factors.

It's good to be cautious in this regard, it's easy to avoid. First of all, continuous planting, planting potatoes on a piece of land for a long time will cause some potato pathogens to accumulate, and it is easy to rot if planted at this time, so it should be cultivated on different land. The second is that the work after everyone's daily treatment of the disease is not in place, and some plants after the onset of the disease are not taken away from the planting site, resulting in secondary infection, or the use of the agent is only for the diseased body, and the surrounding plants forget to deal with it, burying hidden dangers.

Another is the habit of composting weeds before planting, which leaves some pathogens in the land.

In addition, when potatoes are planted, they encounter too much rain, water in the field, heavy stubble and other reasons will induce this disease

If you want to plant potatoes to prevent and control root rot diseases, you should pay attention to the rational use of fertilizers, and you should not use too much chlorine-containing fertilizer when planting potatoes, because when the concentration of chlorine-containing fertilizers reaches a certain level, it will poison the root system of potatoes, reduce the content of starch and sugar, and affect the yield and quality of potatoes.

Keep the soil moist before emergence and do not accumulate water in the field.

If you want to prevent potato root rot disease, you need farmers to avoid heavy planting, try to plant in rotation with rice, corn, small trace wheat, beans and other crops, and at the same time, when planting, we should select disease-free roots as seed potatoes, and pay attention to cultivating strong seedlings.

Before planting, farmers should also use new high-fat film seed dressing to strengthen the ability of heat preservation and moisture retention, improve the germination rate of potato seeds, and strengthen field management to repel underground pests and avoid root rot caused by pests.

Secondly, it is necessary to increase organic fertilizer and potassium fertilizer in the potato field in a timely manner, pay attention to the foliar spraying of photosynthetic nutrient film fertilizer to improve the plant's own disease resistance, and use microbial bacteria to fertilize the roots or irrigate with water to enhance the potato posture's own resistance to major diseases.

Potato root rot is mostly caused by root rot. Excessive rainfall, water accumulation in the field, heavy stubble and other reasons can cause this disease to occur.

Therefore, the soil should be kept moist before emergence, but no water should accumulate in the field. Watering and timely plowing after rain and hoeing.

Preventive measures: 1) Crop rotation with rice, corn, wheat, beans and other crops;

2) Select disease-free tubers to make seed potatoes, and use a new high-fat film to dress seeds before sowing, which can keep warm and moisturize and improve seed germination rate. Repel underground insect pests, isolate virus infections, and make seedlings robust.

3) Increase the application of organic fertilizer and potassium fertilizer, and spray photosynthetic nutrient film fertilizer on the foliar surface to improve the disease resistance of plants.

4) Root Shitong can be used to irrigate the roots with carbendazim wettable powder or with water.

It is necessary for farmers to avoid heavy cropping.

The potatoes themselves may have been infected with germs, or the soil was poorly disinfected, or they could have been waterlogged.

There are two reasons why potatoes rot and die seedlings:

1. The seeds themselves have pathogens.

2. There are pathogens in the soil.

Prevention and control methods: 1. Use Beijing Xinke plant to protect rotten roots and dead seedlings 120, and apply it with water when watering, with a dosage of 500-1000ml per mu

2. Rinse with 98% oxazine with water, and the dosage per mu is 50-100g

Long-term use of compound fertilizer, urea, compound fertilizer, basically do not use organic fertilizer, resulting in a lack of soil organic matter, less and less beneficial bacteria, more harmful bacteria, coupled with soil compaction, poor air permeability, severe salinity, new roots can not be born, old roots are infected by fungi, resulting in rotten roots and dead trees.

2. Soil problems.

In fact, most of them are due to fertilization, and the important point is that we have not supplemented and repaired the soil in time, and many soils have not been ploughed for a long time, resulting in the growth of roots to the surface, and in the long run, breathing will suffocate to death.

3. Apply a large amount of unrotted manure.

This is very common, many people think that manure is cheap, so they buy a lot of manure locally and do not use professional decomposition fungicide or decomposition program, resulting in insufficient fermentation of manure, secondary heating after being applied to the soil, burning roots and injuring roots, and rotten roots and dead trees appear after a long time.

4. Nutritional problems.

This will happen in many places, that is, there are many fruits this year, and there will be fewer results in the second year, many friends think that the results of the previous year are exhausted, which is also true, but the reason is that after the results, the nutrients required by the crops cannot keep up, resulting in root death.