How to deal with dead seedlings and rotten roots of planted vegetables?

In recent years, with the continuous planting of greenhouse crops, the phenomenon of dead trees and rotten seedlings in greenhouses is becoming more and more serious, in order to avoid this situation, it is necessary to understand the cause of this problem.

The main causes of dead trees and rotten seedlings are as follows:

1. Continuous cropping, long-term planting of a single crop, resulting in heavy cropping.

In response to this situation, crop rotation can be carried out to reduce the harm of heavy cropping.

Second, a large number of chemical fertilizers are applied, and the lack of organic matter in the soil causes soil compaction and salinization.

Reduce the amount of chemical fertilizers, increase the application of organic fertilizers and bacterial fertilizers, and improve the soil.

Third, the management problem, due to the wrong management method, caused the accumulation of harmful bacteria in the soil and the infection of the root system.

You can use fungicides to prevent and control dead seedlings, apply or irrigate roots with crops, and use soil treatment agents such as Weibaimu or lime nitrogen to treat the soil after clearing the garden.

In addition to the above prevention and control methods, there is also an important method to use more microbial agents, such as Bacillus polymyxoids, which is a good fungus for the prevention and control of dead seedlings at present, and the effect is very good through the promotion test in recent years.

1. Reasonable watering, create good temperature and humidity conditions for the root system, and keep the soil moisture at about 70%.

2. Pay attention to soil conservation. It is recommended to use self-nutrient biological bacteria to flush fertilization and organic inorganic suspended carbon water-soluble fertilizer, through the mass propagation of beneficial bacteria and the addition of a variety of nutrients, not only can improve the soil, but also solve the problem of soil stubble, and can quickly establish dominant bacteria around the root system, prevent the invasion of harmful bacteria, prevent the occurrence of root diseases, and maintain the root system.

When sowing, stir the seeds together with some fungicide. This has a great advantage, so it can effectively kill the pathogenic bacteria of the seed, so that planting will not affect our future income. If you don't do this, you just do the work on the soil, which can lead to incomplete sterilization.

This pesticide should also be sprayed after the emergence of vegetables, such as R. solanacear. These pesticides can effectively prevent root rot.

This is caused by overwatering during the planting process, so you should water less, and you should choose some soil with better drainage, and you should also prevent small insect pests, so that there will be no root rot when planting.

In the process of planting vegetable seedlings, the most likely problem is dead seedlings and rotten roots, let's take a look at how to deal with it.

Prevention and control methods. 1) Preventive measures: Before sowing, choose the fine nail fludioxonil suspension seed coating agent, according to the ratio of 1:200 300 for seed dressing, the seed coating agent is evenly wrapped on the surface of the seed, dry and sow the seeds, because the fine nail fludioxonil has good systemic conductivity and stability, it can not only kill the bacteria inside the seeds, but also effectively prevent the bacteria from infecting seeds and seedlings, and prevent the occurrence of cataplexy and blight.

2) Prevention and control methods: after cataplexy or blight occurs in the seedbed, 1000 times of the liquid of the suspension seed coating agent can be sprayed with 1000 times of the dimethyl fludioxonil suspension seed coating agent, which can also effectively prevent and control the continued harm and spread of the disease; For seedlings that have been planted and have blight or root rot, they can also be irrigated with 1000 times of Pyroxonil suspension seed coating agent, which can also effectively prevent the spread of the disease.

The first disease that causes dead seedlings is blight, commonly known as dead seedlings, mostly occurs in the middle and late stages of seedling growth, in the early stage of the disease, oval dark brown spots appear at the base of the stem of the seedlings, under suitable environmental conditions, the lesions gradually expand to the surroundings, the lesions gradually sink inward, the seedlings can not obtain enough water and nutrients, the seedling growth slows down, the leaves become smaller, when the lesions around the stem for a week, finally, the seedlings die, but the seedlings do not lodging, when the humidity is large, the sparse light brown arachnoid mold can be seen in the disease site.

What to do with vegetables, small greens, dead seedlings and rotten roots? Dead seedlings and rotten roots are mainly caused by low temperature or too much moisture, which should be caused by increasing the ground temperature or spraying some foliar fertilizer.

Soil contamination may be caused by the presence of certain chemical elements in the soil that are not conducive to the growth of the root system. Overwatering can lead to root rot. Pest parasites cause root rot.

How to deal with the dead roots of small green cabbage seedlings when planting vegetables? Then it should be well, buy a medicine, you should plant vegetables, how to deal with the dead and rotten roots of the small green cabbage seedlings? That should be um, buy a medicine, should buy a medicine that does not rot roots. Just sprinkle it in.

1. Watering: If you want to save the wilted vegetable seedlings, you need to water them, which can be watered once a week. 2. Shade:

Build a shade net on the vegetable field to block the bright light for the vegetable seedlings. 3. Fertilization: compound fertilizer should be applied 2-3 times during the growth period of vegetable seedlings.

4. Prevention and control of pests and diseases: spray bactericidal agents on vegetable seedlings and pull out seriously infected seedlings.

1. Water immediately

Vegetable seedlings need sufficient water in the growth process, when breeding vegetable seedlings, if the watering is too little, and the ambient temperature is too high, it will cause the plant to wilt due to lack of water, it is necessary to immediately water the vegetable seedlings once a water, and to water once a week, so that the soil water content reaches more than 60%.

2. Shading measures

Vegetable seedlings are not resistant to strong light exposure, when breeding vegetable seedlings, if the light is too strong, it will cause the plant to be sunburned, so that the leaves of the vegetable seedlings are scorched and wilted, and it is necessary to build a shade net on the vegetable field, and a black plastic net can be used to block the sunlight for the vegetable seedlings to make them grow healthily.

3. Fertilization management

Vegetable seedlings will wilt when malnourished, when breeding vegetable seedlings, it is necessary to apply 2-3 times of nitrogen, phosphorus and potassium compound fertilizer in the growing season of the plant to provide the nutrients needed for growth, so that the growth rate of vegetable seedlings is accelerated, and the vegetable seedlings need to be stopped fertilizing one week before harvesting, so as to avoid fertilizer damage to the plants.

4. Prevention and control of pests and diseases

When breeding vegetable seedlings, if the plant is infected with pests and diseases, it will cause it to wilt and yellow, and the vegetable seedlings need to be sprayed immediately with harmless fungicides to eliminate germs and pests, and the seriously infected vegetable seedlings should be pulled out and burned intensively, so as not to cause large-scale infection, so that the vegetable seedlings can quickly recover their health.

1. There are many rotten roots of vegetables, especially in the seedling period, which affects the normal growth of seedlings, and the main reasons for rotten roots are: low temperature and ground temperature; Lack of light; The humidity in the seedbed is large, and the seedbed is not easy to ventilate, which leads to the weakening of seedling growth, and it is easy to rot the roots.

2. The general solutions are: increasing the application of organic fertilizer and decomposing organic fertilizer, especially hot farmhouse fertilizer, can not only improve the disease resistance of seedlings, but also increase the soil temperature of the seedbed and reduce the incidence rate.

3. Before raising seedlings, mix the well-rotted and finely broken hot farmhouse fertilizer and bed soil in the seedbed at a ratio of 5:1 as the seedling soil, and apply nitrogen fertilizer as the base fertilizer as little as possible in the seedbed. Note:

Organic fertilizer should be fully decomposed, and it is best to treat it with a professional starter (such as Gymboree starter culture) to avoid "burning seedlings" and a large loss of nutrients. Control the amount of wateringWhen raising seedlings in protected areas such as greenhouses or greenhouses, the seedbed is generally not obviously dry (the topsoil is not scattered in hand) and does not water; The amount of watering should not be too large when there is a clear drought. Pay attention to ventilation after the cotyledons, choose sunny and warm weather to uncover the mulch for ventilation, and evenly sprinkle a layer of fine dry soil on the seedbed, and then cover the mulch tightly, which can not only reduce the humidity of the bed soil, but also have a certain warming effect.

4. The application of rooting agent uses functional microorganisms and related products to improve the microecological environment of seedling roots, which can promote early germination of seeds, increase ground temperature, and promote weak seedlings to become strong seedlings. A better Shengzheng liquid root seedling agent can achieve the dual effects of "prevention" and "treatment" at the same time, such as Gymboree root and seedling strength.

How to put an end to the problem of rotten roots and leaves.

In the planting process of vegetable seedlings, avoid rotten roots and leaves, and maintain disinfection and sterilization of the production environment, beans, equipment, containers, production water, and personnel, so as to avoid dead ends and avoid microbial breeding. Choosing the right disinfectant is essential:

1. It needs to have a broad-spectrum and efficient sterilization effect, and a disinfection product can kill bacteria, fungi, molds and other pathogenic microorganisms;

2. No bacterial resistance to meet the requirements of long-term repeated use;

3. The requirement is a food-grade disinfectant, which is harmless for consumption;

4. It is required to have mature application in the planting industry;

In the usual maintenance process, you can apply water-soluble fertilizer to supplement nutrients and enhance resistance.

Caused by root rot or cataplexy blight. It can be used for soil disinfection and sterilization to effectively reduce the infection of pathogens. Pay attention to rotation, don't plant one single, you can rotate planting, it's better. Soil disinfection and sterilization and seedling spraying fungicides are necessary.

Then you have to find out the reason, what is the reason for such rotten roots and seedlings? It's caused by you fertilizing it, so there's a lot of rot in this fertilizer! Or is it because the glue is not clean, which causes him to rot, and he has to prescribe the right medicine.

The main thing is to grasp the appropriate temperature, especially the temperature can be too high, and the other is to do a good job of circulating water often circulating, so that there will be no root rot.

The special environment of the shed causes the severity of the heavy stubble of the planting vegetables, and the continuous cropping and use of inferior chemical fertilizers by farmers and friends in the planting of vegetables cause salinization, compaction, soil-borne pests and diseases, acidity and alkalinization, and cause obstacles to the respiration of the root system of sparse vegetables. In the process of growth, plant roots, like other organisms, will also have a metabolic effect, and will discharge or produce many harmful substances, which will directly threaten the healthy development of the roots themselves. And the toxins in the soil accumulate more and more, if the heavy crop is planted, there will be underdeveloped root system, dwarf plants, slow growth phenomenon.

For such unfavorable situations that have occurred, they can only be alleviated by applying organic fertilizer, biological fertilizer, supplementing trace elements and applying growth regulators, etc., to alleviate the symptoms of these adverse effects The soil is serious and the root system is seriously damaged, mainly due to soil compaction acidification caused by unreasonable irrigation, lack of soil organic matter, and unreasonable use of fertilizer. Before planting, microbial inoculants or dimethylpyr can be used for root treatment, or microbial inoculants can also be applied after planting, such as Bacillus multiviscosus, Bacillus cereus jinggang, etc., or root irrigation treatment with methamethoxaline, etc., can well prevent soil-borne diseases caused by heavy cropping. The land is rotated, planted in a planned way, and different crops are cultivated alternately or in alternate years or two years.

Solving the problem from the root cause and avoiding continuous cropping of crops leads to the lack of a trace element in the soil and the excessive number of certain nutrients, which will cause a decline in crop yield and soil diseases. If the crop has symptoms of soil-borne virus during the growth period, the root is sterilized by chemical agents, and the diseased plant is burned in time to avoid greater losses caused by the spread of the virus.

<> has deep roots and lush leaves, and if there is no developed root system, the plant is weak in resistance and is easily infected with pests and diseases. In addition, it does not absorb nutrients from the soil well, resulting in lower yields. In particular, melons and eggplant vegetables that have been planted for a long time and have a large amount of melons are difficult to get good returns if the root system is poorly developed.

It should be removed, and it should be watered frequently, we should weed it often, and we should also have the ability to fertilize it, so that it can be prevented.

It is best to plant in rotation, if you must plant heavy crops, you can choose crops that are more resistant to heavy stubble for planting, improve the content of various nutrients in the soil, pay attention to the management of water and fertilizer, you can avoid rotten roots.

At this time, it is necessary to cut off these rotten roots in time, and do not continue planting, try to buy new ones, first of all, to observe the growth of these plants frequently, and also to water and fertilize.

For the field that has produced insect pests, we should pay attention to the implementation of crop rotation, intercropping, and intercropping as much as possible across crops, generally different plots are planted in rotation every 2-3 years, and it is best to enter 1 water and drought rotation every 2-3 years, such as rotating all kinds of eggplant vegetables and gramineous grain crops, such as tomatoes, peppers, eggplants and other eggplant crops and Chinese cabbage, cabbage, celery and other leafy vegetable crops, such as soybeans, kidney beans, cylinder beans, Legumes such as mung beans and underground tuber crops such as potatoes, sweet potatoes and radishes are rotated, for example, leafy vegetable crops with large nitrogen needs are rotated with legumes, such as acid-intolerant onions, ginger, garlic and acid-tolerant corn and pumpkin, etc., such as tomatoes and peppers, cucumbers and bitter gourds.