Spinach has mosaic disease, what is the reason for this?

The reason is the emergence of germs, so it is necessary to strengthen the management of this aspect, and carry out a lot of fertilization, watering, and that's it.

Mosaic disease in spinach can be caused by spring or autumn drought, overgrown soil, aphids, early sowing, insufficient fertilization, poor management, loosening of soil, excessive mechanical or manual management, less watering, dry soil, or unclean fields.

Spinach leaves turn yellow or even fall off, and may be infected with spinach virus disease or downy mildew. 1. Most of the reasons are because of poor soil quality and poor air permeability, which leads to poor spinach growth environment. 2. If there is no excessive amount of watering, it will make the spinach roots grow in a bad environment because we lack an oxygen.

Mosaic disease in spinach is mainly transmitted by aphids, especially peach aphids, and to a lesser extent by mechanical and contact transmission. Mosaic disease can also occur in insufficient fertilization, poor management, and cultivated loose soil.

Spinach mosaic disease, also known as spinach virus disease, occurs universally in the country, and in recent years, the disease tends to be serious in many areas. The early-sown plots are heavier than the late-sown plots, the plots close to cabbage, radishes and peppers are heavier, the fertilizer is insufficient, the seedlings grow weakly, and the diseases are also heavierControl methods: Clean garden:

If the diseased plant is found, it should be pulled out in time, and attention should be paid to removing weeds in the field to reduce the source of disease Strengthen management: choose a plot with good ventilation, far away from cabbage, radish, pepper or cucumber for planting, apply enough organic fertilizer, promote strong seedlings, appropriate late sowing, and pay attention to watering more when high temperature and drought Prevention and control of aphids: silver ash film can be laid in the field to avoid aphids, aphids occur period, especially aphid migration period, pay attention to timely drug prevention and control Pesticide control:

At the beginning of the disease, spray 1000 times of the emulsion of the disease, 300 times of the anti-poison No. 1, once every 10 days, and 2 3 times of continuous prevention and control.

But today we are not talking about eating, but about planting, there will be a lot of pests and diseases in the process of planting spinach, what good ways do we have to prevent and control, is the key to planting good spinach to eat in shabu-shabu. The symptoms of mildew disease are mainly harmful to the leaves of spinach, which will have small yellow spots at the beginning, mainly concentrated on the back of the leaves, and will gradually turn grayish-purple at the back, mainly from the bottom of the spinach to the top of the phenomenon.

Botrytis cinerea, this fungus mainly acts on leaves, showing irregular brown spots, and may be found as large spots in the later stage, with gray signs of mildew on the back of the leaf residue field, and even rotting and blackening in severe cases. In addition to spinach, the fungus also harms quinoa plants such as sugar beet, causing similar symptoms. The spinach white spot fungus overwinters in the soil with the mycelium and the diseased residues, and spreads through wind and rain in the next spring.

It is easy to develop disease under weak growth potential, warm and humid conditions, and severe disease is caused by low-lying terrain, nest wind, and poor management.

The diseased plant began to develop the disease after growing 3 true leaves, and the leaves became dark and dull at the beginning of the disease, gradually wilted and yellowed, and the roots turned brown and died. Plants with early onset are significantly dwarfed. Spinach diseases and pests are a common type of diseases during the growth of spinach, which causes serious harm to the growth of spinach. Therefore, farmers need to do a good job in the prevention and control of the disease.

So, what are the common pests and diseases of spinach? How to prevent it? Let's lead the big boy Liang Dan's family to learn about the collection of spinach diseases and pests.

At the beginning of the disease, spray 500 times of 5% bacterial poison water or 700 times of Ketolin water, 600 times of virus Bike wettable powder, and 500 times of 20% virus Ning water-soluble powder, once every 10 days or so, and prevent and treat 1 or 2 times. Discontinue the drug 3 days before harvest.

The mold layer on the back of the lesion is the sporangia and sporangia of the fungus, which are spread by the air stream and produce new lesions. Condensation and high humidity are important conditions for pathogen infestation. Spinach downy mildew mainly damages the leaves.

The disease is severe under the conditions of high planting density, poor field ventilation, low-lying stagnant water, low temperature and high humidity.

1.The silver gray film strip is hung on the protective ground, which can play a role in avoiding aphids.

2.Choose plots with good ventilation, away from turnips, cucumbers, houses to grow spinach; Sow at the right time and avoid early sowing; In the event of spring drought and autumn drought, more watering should be done to reduce the onset of disease; Apply enough organic fertilizer, increase phosphorus bucket and poor potassium fertilizer, and improve disease resistance.

Spinach should be watered more often, and then sprayed with insecticidal pesticides in advance, so that spinach mosaic disease can be well prevented.

Pay attention to the soil environment and temperature environment of spinach, usually water and fertilize spinach regularly, supplement nutrition, and spray some pest control agents.

What is going on with the yellowing of spinach leaves, the causes of yellowing of spinach leaves and the prevention and control measures.

Spinach is one of the common vegetables in daily life, with high nutritional value and is very popular in the market. In the process of spinach planting, there is often the problem of yellowing of the leaves, so what happens to the yellowing of spinach leaves? What are the causes of yellowing of spinach leaves and control measures?

Causes of yellowing of spinach leaves.

1. Self-growth: If it is a new root that grows at the bottom of the axils of the leaves, causing the spinach leaves to turn yellow, this is a very long imagination, in terms of biology, it is metabolism, and there is no need to worry about this situation.

2. Planting soil: If the spinach leaves do not regrow new roots from the bottom of the leaf axils and cause yellowing, it is mostly because the soil quality is not good, poor air permeability, etc., resulting in poor growth of spinach and yellow leaves, at this time, the land should be renovated to increase the air permeability of the soil layer.

3: Fertilization problem: When spinach is planted, a large amount of nitrogen, phosphorus and potassium fertilizer elements are needed, and the ratio of nitrogen, phosphorus and potassium elements is 2:

1:3, but you can't only apply these three kinds of fertilizers, or you can cooperate with the application of some iron, zinc, manganese, boron microelements into the soil, because if these are indeed affected by the yellowing of spinach leaves, you can also spray some trime amino acid foliar fertilizer on spinach in the later stage to increase nutrients and prevent the leaves from turning yellow.

4. Watering: In the process of spinach planting, if the amount of watering is too large, the roots of spinach will turn yellow because of the lack of oxygen and poor growth, so the leaves turn yellow, then you can insert a chopstick into the soil when watering, to see if the roots of spinach are lacking in water, if the soil is in a moist state, there is no need to water.

Control measures for yellowing of spinach leaves:

1. Agricultural measures: choose those disease-free seeds when planting, and hang some silver ash film in the field to drive away aphids. It is necessary to keep the surface of the land clean and eradicate diseased plants and weeds in time.

When planting, choose well-ventilated terrain and water spinach in dry seasons, which can reduce the yellowing of spinach leaves. Fertilization can be carried out, and phosphorus and potassium fertilizers can be added, which can improve the disease resistance of spinach and make spinach grow healthily.

2. Pesticide control: In the early stage of leaf yellowing, you can spray some plant disease emulsion, or spray some anti-poison agents. For downy mildew and anthracnose of spinach, in the initial stage, it can be treated with 75% chlorothalonil 600 times solution, 25% methalonil 700 times solution, 40% ethyl phosphorus aluminum wettable powder 300 times solution, etc.

The leaves will turn brown and will slowly wither, which will also cause widespread death. It is necessary to kill germs in time, spray drugs in time, and supplement trace elements in time.

Spinach wilt disease generally occurs more seriously in the adult plant stage, mainly harming leaves. Pale green dots appear on the affected leaf surface at first, and then expand into pale yellow irregular spots with indistinct edge demarcation, and gray-white to lilac velvety mold layer appears on the lesions on the dorsal leaves, which is the symptom of the disease (pathogenic cyst peduncle and sporangia). Do a good job in fertilizer and water management, increase phosphorus and potassium fertilizer, avoid partial application of nitrogen fertilizer, timely spraying of foliar fertilizer and new high-fat film to make plants grow early and quickly; Proper watering, do not make the soil too dry or too wet, pay attention to ditch drainage and moisture reduction after rain; In the growth stage of spinach, timely spraying of strong stems can make the plant stems thick and the leaves hypertrophied, improve the disease resistance of spinach, reduce the amount of pesticides and fertilizers, reduce residual toxicity, and improve the natural taste of spinach.

The atrophy of the leaves is more serious, and there is a yellowing situation, so it is necessary to pay attention to the daily condition of the plant, which needs to be watered on time and the surrounding weeds need to be cleaned up.

The leaves will lose their luster, will gradually turn yellow and will die, and then there will also be a large area of death. Spray chemicals in a timely manner, and remove the problematic parts to avoid causing other problems.