What should I do if there is a large area of dead plants in the planted green onions?

It shows that there is not much nutrition in this farmland, so it is good to reduce losses in time and plant green onions on another piece of farmland.

The phenomenon of planting a large area of dead green onions should be done, first remove all the wilted green onions, and then replace them with new ones, and then spray them with pesticides after replacing them, so as to avoid it from wilting twice.

Most of the cases that occur are remedied and can only prevent the occurrence of dead plants. The main way to prevent the dead plants of green onions is to carry out reasonable planting. In case of rainy days, it is necessary to drain the water in time to avoid the problem of dead plants caused by high humidity.

At the same time, strengthen fertilizer and water management, especially to supplement enough nitrogen, phosphorus, potassium and calcium and other elements to promote the growth of green onion roots. It is also necessary to spray the fruit in the formation stage of green onion to promote the thickening of the underground fruit transportation duct, improve the expansion and vitality of the ground rhizome, and promote the high yield and high quality of green onion. Of course, the main thing is to enhance the disease resistance of green onion plants.

Green onions are a very common vegetable in our daily life, and many people also add green onions when cooking, which can make our dishes more delicious. In rural areas, many people also grow their own green onions, if we find that the green onions we grow are getting wilted the longer they grow, first we can see if the soil is compacted. Because the root system of green onions is relatively short, if the planting soil is clumped, the roots of the green onions will not be able to breathe, so it will also cause the green onions to wilt.

Therefore, in the process of planting green onions, it is best to loosen the soil for the green onions once a month.

The second reason may be that the roots of the green onions are waterlogged, if we water the green onions frequently in the process of planting green onions, it will cause the roots of the green onions to rot under the long-term soaking of water, and then there will be wilting symptoms. Therefore, during the planting period, it is best to regularly observe the condition of the soil and water it when it is found to be dry.

The third reason may also be that the temperature is too low, green onions are suitable for growing in a warmer environment, if the temperature of planting is too low, it will cause the green onions to be frostbitten, so that there will also be wilting symptoms. Therefore, we should also properly observe the changes in the climate during the planting period, and try to provide warm measures for the green onions in the cold time to maintain a warm growth environment. The last reason is the lack of light in the growth process of green onions, if we plant green onions in a dark and dark place for a long time, it will also cause the green onions to wilt symptoms, it is best to choose a place with sufficient sunlight to plant green onions.

It may be due to downy mildew, or white rot, or it may be due to lack of water, or it may be caused by a lot of light.

It may be that the temperature is too high, or it may be shallow during planting, or it may be caused by lack of water.

It may be that there are pests and diseases, or it may be a problem with fertilizer and water, so you need to water more and then buy some medicine for spraying.

The sowing time of green onions is relatively wide, which can be sown in spring, summer and autumn, and can be sown in spring when the soil is frozen. At this time, the sown shallots are generally sown in summer.

Sale. In summer, the seeds are sown from late July to early August. Since the plant grows larger before wintering, and when the weather warms up the following year, the new leaves will grow well, so the croissant pie can be used after it is marketed.

In autumn, they are sown in early September and eaten in May of the following year, and they are sold in the winter green onion mode before winter comes, or they can be harvested when they bloom in the third year. The time for planting green onions in autumn is stricter. If planted too early, it is prone to moss growth in the spring of the second year, making it unsuitable for transplantation.

If planted too late, the shallots plant is small and prone to freezing in the cold winter.

Unfrozen shallots grow slowly after they return to turquoise the following spring, so the best time to sow shallots in autumn is white dew.

Until autumn. Green onions are reluctant to grow Georgian.

To choose plots that have not been planted with leeks, green onions, garlic, onions for 3-4 years. Sprinkle the farmhouse before planting.

Fertilizer, then by deep ploughing and raking the plots planted to be loose and soft, this will help the green onions to take root and sprout. Green onion planting usually chooses the sowing method, watering first, infiltrating the water and then sowing evenly. Usually around 4 kilograms per acre.

After sowing, it can be covered with mulch film to promote the germination of green onions. The green onion seedlings can basically be removed after they come out, and the weeds should be removed in time when there are many weeds.

Pour overwintering water before the soil freezes, and combine the water for a top dressing, which can effectively increase the ground temperature and make the green onion seedlings safely survive the winter. It can be officially eaten in May of the second year, and it is watered once 2 to 3 days before germination, and it is easy to germinate and the roots will not be damaged. When planting, large and small saplings should be separated, and hybridization is strictly prohibited, which is easy to affect future management.

Before the formal planting of the plot, the sole fertilizer should be applied, and the fertilizer should be evenly mixed in the deep soil, and the formal planting density should be between 13,16,000 trees per mu, and the fertile soil should be planted less, and the poor soil should be more diverse. After the main meal, compress the loose soil on both sides of Paju and water it. Now is the best time to plant autumn green onions.

The varieties of green onions suitable for autumn planting include Changjiupai and Sycamore trees.

Shouguang eight-leaf tooth and so on.

Because it doesn't grow well, if you cut off a stubble and then plant it, it will grow thinner.

Green onions are not suitable for continuous cropping, and green onions have been planted for many years, and the accompanying pests and diseases in the soil will become more and more serious. If you want to plant again, it is recommended to thoroughly sterilize and disinfect the soil after the harvest of the last crop, and add Bika microbial agent + organic fertilizer, which can effectively change the physical and chemical properties of the soil and develop on the good side.

If it is planted in heavy crops, it will produce insect pests, and it will also affect the yield of green onions, and the consequences will be more serious.

It will cause an increase in soil diseases, resulting in the susceptibility to root rot and soft rot of green onions, and the increase of insect pests, which will seriously affect the growth and yield of green onions. The nutritional requirements of green onions are fixed, long-term continuous cropping, these nutrients it prefers must be insufficient, and the nutrition of green onions is unbalanced, and it is difficult to grow normally.

Green onions can't be planted again, what is the reason for this? Changes in pathogenic microorganisms. At present, the multiple growth rate of plant soils is very high, and green onions are often planted year after year and cannot be replanted.

The main reason is that green onion nematodes play an important role in plant damage, followed by various pests, bacteria, and underground viruses. The soil must be treated to kill insects, nematodes, sterilize and disinfect. It can be grown continuously.

Plants include: cucumbers, pumpkins, soybeans, peas, onions, onions, and soil.

Garlic, garlic, leeks, strawberries, etc. There are two reasons why these plants cannot be planted continuously: on the one hand, one plant is grown all year round, and the nutrients in the soil are continuously planted for a long time.

The required residues in the soil will be uneven, and the elements loved by green onions will be consumed, resulting in a basic lack of nutrients. Especially in some soils, the long-term use of chemical and organic fertilizers for continuous cultivation is a unique method: increased application of decaying agricultural fertilizers and phosphorus and potassium fertilizers to complement continuous tillage and continue to grow green onions.

Pests and diseases of green onions are on the rise, and many diseases and plagues are resistant.

Finally, labor costs have increased and green onion production has increased, causing losses to farmers. "Green onions can be planted in continuous slices, but continuous harvesting is prone to disease and requires trace elements such as sulfur, zinc, and calcium, and serious diseases and plagues will occur after continuous harvesting, and the income is low. It's best to run for three to four years.

Magnesium and iron promote the healthy growth of onions and improve disease resistance. There are many diseases in the soil that kill green onions with fungicides, but continuous cultivation of green onions can lead to diseases. This is a continuous harvest of green onions, and the disease is a disease caused by a variety of reasons.

The general incidence is 10% 30% continuous harvest treatment: crop rotation is the best control measure.

Avoid continuous harvesting in green onion production. In general, some crops can no longer be cultivated? Continuous cropping generally refers to the planting method of planting the same crop on the same plot for more than two consecutive years, with an interval of 3-4 years.

It is best to rotate with grass crops, or with cabbage and aberdo in the Large and Medium Porter Islands. Although green onions are milder diseased, they are not suitable for continuous harvesting. The agricultural proverb "spicy" means that green onions and shallots cannot be grown not only consecutively, but also not with other green onions and garlic vegetables.

The reason is the slaughter of the roots of green onions and garlic secreted.

Before freezing. Dig up some loose soil and prepare enough, and the container for planting onions is also very easy to solve. Find some large bowls of noodles that you usually use, and don't use too large containers.

If you just eat at home, carry two or three buckets every 10 days and 8 days, so that you can, all winter planting: plant green onions in pots, you can put the potting soil outside to be exposed to the sun to disinfect, and then use carbendazim wettable powder (active ingredient content 80%) sprinkled in the potting soil to mix, which can effectively kill the germs in the soil and reduce the incidence of green onions; At.

First, the cold winter almost kills the green plants. There was a lack of life inside and outside the house. At this time, planting some green onions in a pot will bring green accents to the winter of Xiaoxiao.

It also brings new hope. Second, the green onions are planted in the pot, because the germination first prepare the pot to be planted with green onions, and drill five small holes under the pot to prevent water seepage and rotten green onions. The pot is filled with soil two fingers less than the pot, and the dried shallots are selected, that is, the green onion beard is complete and there are no maggots, cut the green onion beard slightly, and trim the upper part of the green onion slightly.

Heavy stubble is the key factor causing green onion root rot. Due to the continuous planting for many years, the pathogenic bacteria in the soil have increased, and heavy stubble diseases are inevitable, which can easily cause the root rot of green onions. Affected by continuous rainy weather, soil moisture is too large, air permeability decreases, affecting the root of the green onion has gray mold, it is recommended to use iprodione + gramsidan formula, the effect is good, of course, there are many products for the prevention and control of gray mold, you can buy in the local regular technical agricultural stores, and use under their guidance.

Green onions are the most commonly used seasoning vegetables in daily life. Green onion cultivation has a variety of cultivation modes such as spring planting and autumn harvest, spring planting and winter harvesting, summer and autumn planting and spring harvesting, winter planting and spring and summer harvesting. The original variety of green onion was first introduced, which can be traced back to the Warring States period.

It is cultivated in the whole country with green onions.

Green onion downy mildew: The symptoms of downy mildew of green onions are oval or elongated leaf lesions of different sizes, pale yellow-green or pale green in color, and the edges are not obvious. When the weather is wet, a layer of white mold (sporangia and sporangis) first grows on the surface of the lesion.

Attention should be paid to the spacing between them, and the soil should be managed in a timely manner to allow them to have a good growth system.

When planting, you should pay attention to the surrounding situation to see if it is human-made, and then try to correct it.

Double the application of "grass manure".

The so-called "grass manure" is a farm manure made from crop straw and weeds. This farmyard fertilizer is not only "fertile", but also very breathable. Therefore, the application of this kind of farm manure in the soil that is too clay has a very good effect on increasing soil fertility and improving soil permeability.

So, you can double the amount of "grass manure" in soil that is too sticky to improve the soil.

Due to years of continuous cropping, soil-borne diseases are serious, resulting in a large number of soft rot, wilt, root rot, and excessive soil moisture, which aggravates the harm of diseases, so there are many plants that die from diseases. Due to the lack of reasonable crop rotation and serious stubble, the last green onion was not thoroughly cleaned after harvesting, and the soil was not disinfected, resulting in pests and diseases invading the green onions, and the resistance of the green onions was weakened, and the phenomenon of dead plants would occur.

In summer and autumn, there are more cloudy and rainy days, and the air humidity is high, which inhibits the transpiration of green onions, and the surface of green onions has a layer of wax, which itself has the effect of preventing water dispersion and loss, and the transpiration itself is small. In this way, the absorption of the root system is reduced, and the nutrients that are added to the leaves by absorbing water are greatly reduced, so the absorption of the root system is reduced, and the nutrients brought to the leaves by absorbing water are also greatly reduced, such as nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, zinc and other fertilizer elements.

The high humidity of the air inhibits transpiration, so the absorption of the root system is reduced, and the nutrients brought to the leaves by absorbing water - nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, zinc and other fertilizer elements - are also greatly reduced. Long-term lack of fertilizer elements can also cause seedlings to die. In summer and autumn, due to the high soil moisture and many years of continuous cropping, soil-borne diseases are serious, resulting in a large number of soft rot, blight, root rot and downy mildew.

Excessive soil moisture exacerbates the damage of diseases, which can cause dead seedlings.

At the beginning, there are yellowish-white or creamy yellow infestation spots on the green onion leaves, either spindle-shaped or oval-shaped, and white mold is produced on them, and in the later stage of the disease, these places will turn dark purple, and if the disease is severe, the diseased plant will die. Summer and autumn are the periods of serious occurrence of insect infestations, and field management must be strengthened. If a pest is found, it is necessary to spray insecticides to control the pest.

Spraying pesticides on underground pests is not effective, and can be combined with fertilization and irrigation to irrigate the roots.