Leeks in the open air have grown yellow tips, is there any way to cure them?

Leeks grow up, there will be such a problem, don't worry too much, you can water the leeks some water, it is estimated that the land is too dry, or it may be that the sun shines and the temperature is too high.

Leeks have yellow tips because they lack nutrients and water, so they need to be fertilized and watered, so that they will grow green in a few days.

Then you need to put the leeks in a sunny place, and you need to supplement fertilizer and water them in time.

Leeks are yellow, dry and pointed.

First, the temperature difference is too large, and the high temperature and high humidity can easily cause the yellow leaves of leek leaves to dry and tip.

Second, the air circulation is not good, the ventilation is poor, and the yellow leaves are dry and the tips of the yellow leaves are caused by the poisonous gas poisoning caused by the gas damage caused by the planting of the protected land.

Third, improper fertilization, serious soil acidification, excessive topdressing causes high concentration of soil solution, resulting in root burning, and will also make the yellow leaves of leeks dry and tipped.

Fourth, the soil is deficient in calcium, boron, and manganese elements caused by the dry yellow leaves of leeks.

Fifth, the dried yellow leaves caused by leeks and thrips.

Sixth, leek blight, gray mold, sclerotinia sclerotinia and other hazards caused by dry tip yellow leaves.

Prevention: Maintain reasonable temperature, light, watering and drainage, and maintain the appropriate humidity of the soil. Reasonable water and fertilizer management, rational use of calcium, magnesium and other trace elements, and good use of foliar fertilizer can effectively promote the physiological function of leaves and reduce the phenomenon of dry tips of yellow leaves.

At the same time, pay attention to pest management and control.

Seedling bed and seedling field bottom fertilizer: before winter or before ploughing land per mu of land sprinkled imported water-soluble fertilizer, ploughed into the soil, leveled furrow, after furrowing can also be sprinkled with a certain amount of rotted high-quality farm fertilizer.

Top dressing at seedling stage: In order to promote the growth of leek seedlings, it is generally combined with watering and secondary fertilizer when the leek seedlings are about 12 15 cm high.

Planting base fertilizer: leek seedlings grow up to 18 20 cm tall is the appropriate period for leek planting.

Before planting, a large amount of well-rotted organic fertilizer should be applied in the planting ground to create a better living environment for the growth of leeks.

Apply the water-soluble fertilizer per mu to the banquet, use the sprinkling, plough into the soil, level the land according to the cultivation method for furrow or open the planting ditch, and then apply high-quality farmhouse fertilizer in the furrow and ditch, and the fertilizer can be planted after mixing evenly with the soil.

Top dressing during the vegetative growth period: After planting, leeks enter a cool autumn after a hot summer.

At this time, it is the most suitable growth stage for leeks, and it is a critical period for fertilizer and water management, and timely fertilization to promote leaf growth has laid a material foundation for the expansion of rhizomes and root growth of leeks.

The overwintering ability of leeks and the growth of the next year mainly depend on the amount of nutrients accumulated by the plants before winter, and the accumulation of nutrients is determined by the growth status in autumn, so we should pay attention to the fertilizer and water management at this stage. Generally, it is necessary to chase 2 or 3 times of fat.

High soil acidity will lead to yellow tips of leeks, and quicklime can be used to adjust the pH of the soil; Leeks are suitable for growing in an environment of 5-35 °C, if the temperature exceeds 30 °C for a long time, and there is no timely ventilation, there will be dead leaves, and proper ventilation should be made; Deficiency of trace elements will lead to nutritional imbalance, and will also lead to leek yellow tips, which should be supplemented in time; High concentration of liquid medicine will cause yellow tip, and the concentration of medicine should be strictly controlled.

1. What is the reason for the yellow tip of leeks?

1. If the soil is too acidic when planting leeks, or if acidic fertilizers such as manure, cake fertilizer or ammonium sulfate are applied to the soil for a long time during fertilization, the acidity of the soil will be increased, making it acidified, and causing the leek to dry and tip the phenomenon.

2. Leeks are suitable for growing in an environment of 5-35 °C, but if the temperature exceeds 30 °C for a long time during planting, and no timely ventilation is performed, or it suddenly clears up after heavy rain, there will be yellow tips and dead leaves.

3. Leeks need a variety of trace elements to grow, and if there is a deficiency of these trace elements, it will lead to nutritional imbalance and will also lead to dry tips in leeks. For example, when calcium is deficient, the leaves are yellowed and the dry tips die, and when boron is deficient, the heart leaves are yellow and grow slowly, and if boron is excessive, the heart leaves will also die.

4. When using medicine at high temperature, the water in the liquid medicine will evaporate rapidly, and the concentration of the liquid medicine will increase rapidly, which is easy to cause drug damage. The drug resistance of vegetables at the seedling stage is poor, and the concentration of the liquid medicine used is too high, which will also cause pesticide damage, resulting in yellow tips and dry tips.

Second, the method of prevention and control of leek yellow tip

1. For dry tips caused by acidic soil, quicklime can be used to adjust the pH of the soil, but it cannot be used in the shed to avoid ammonia damage. Top dressing can be done with ammonium nitrate and urea, pay attention to the dosage, with a small amount of many times as the principle, ammonium nitrate should be applied with water, urea can be sprinkled on the soil surface. Rotten organic fertilizer can be used instead of ammonium bicarbonate, cake fertilizer and manure, etc., and watered in time after fertilization.

2. When the temperature in the greenhouse is 20-30 °C, you can put a small wind appropriately, and as the temperature continues to rise, you should also enhance the ventilation accordingly. The speed of ventilation should be slow, and it is not appropriate to let cold air enter suddenly, and the temperature difference between day and night should be adjusted appropriately through ventilation to reduce the temperature.

3. Properly apply some organic fertilizer when fertilizing to ensure the growth of leeks.

4. Strictly control the concentration of liquid medicine when using medicine, and avoid excessive use of pesticides containing manganese, such as mancozeb, etc., which can prevent the yellow tip and dry tip of leek caused by excess manganese.

The reason why the leek leaves are yellow and sharp is due to soil acidification, high temperature and improper ventilation, and to solve this problem, it is necessary to sprinkle lime in the leek field and ensure the ventilation of the leek leaves.

When many people grow leeks, they will find that the leaves of the leeks they grow are yellow and pointed, and when they see this situation, some people will mistakenly think that the leeks lack nutrition, but in fact, the sharp and yellow leaves of the leeks are related to many reasons.

If too much fertilizer is applied to the leek field during the leek planting process, it can easily lead to serious soil acidification. If the problem of soil acidification is not solved in time, the leaves of the leeks will become sharp and yellow, and in more serious cases, the leeks will be burned to death. <>

Growing leeksAt the time, it is necessary to ensure the ventilation of leek leaves, because the most suitable temperature for the growth of leeks must be about 30 degrees, if it exceeds this range, then the leek leaves will die in pieces. Therefore, properly ensuring the ventilation of leek leaves can allow us to eat fresh and healthy leeks. <>

If it's because the leek ground is too acidicThen we should use lime to adjust the acidity of the leek field, you must know that lime is an alkaline substance, only by neutralizing the pH of the leek field, can we completely solve the problem of sharp and yellow leek leaves, in addition, we must ensure good ventilation, only in this way, can we grow good and fresh leeks. <>

Although the growth of leeks will be very rapid after they are planted, if there is a disease problem in the leek planting process, then it will be difficult for us to eat fresh leeks, so in the process of planting leeks, we must pay attention to the problems encountered by leeks.

It may be a lack of trace elements, a lack of calcium, or a lack of organic fertilizer. You must solve it by fertilizing, but also pay attention to watering in time and not letting the soil dry too dry.

It may be caused by malnutrition, it may be caused by the variety, you can cut off the leek, water and fertilize it in time, and then let the leeks grow again.

Summary. The main reason for the sharp yellow of leeks is the lack of trace elements.

The tips of the leeks are yellow, what's going on?

The main reason for the yellow tip of the leek is the lack of trace elements, which leads to the lack of trace elements, which will turn yellow in the future, and then lead to the yellowing of all aspects of nutrition

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It's just that the tips of the leaves are wilted and yellowed, and the whole plant will not be green.

Yes, I know, it is.

If the disease is what is the disease, if it is a deficiency of nutrients, it is a deficiency of trace elements.

When calcium, the tips of leek leaves will turn yellow and die.

Should it be combined with the application of calcium fertilizer, and what fungicide can be sprayed?

This is not more than a pest.

Medication doesn't work, you try sprinkling some water at night when the weather is cooler.

Don't too much. It's not caused by drought, the ground is still moist, and what you need is to use what fungicide is effective.

Good. In the future, when it comes to fertilization, it will be fine.

You don't need to inject any drugs.

It should be leek blight, which poses a great threat to winter leeks and should be prevented and treated in time. The main prevention and control measures are as follows.

1. Small water. Water. Because the leek blight is spread by the flow of water, such as flood irrigation, it is easy to cause the humidity in the greenhouse to increase, so that the epidemic spreads, so it should be irrigated with small water. In addition, pay attention to the topdressing of phosphorus and potassium fertilizers when fertilizing, as too much nitrogen fertilizer will cause the occurrence and expansion of blight.

2. Timely ventilation. Pay attention to ventilation after watering to reduce the humidity in the greenhouse. Ventilation is selected at noon on a sunny day without wind, the general ventilation time should not be too long, 1-2 hours is appropriate, when the shed area is too large, the method of ventilation can be taken in many places, but the vent should not be too large, too large is easy to cause leeks to wilt.

3. Remove dead leaves. The dead leaves remaining in the soil are the root cause of leek blight, which should be cleaned in time and ventilated to reduce the indoor bacterial source.

4. Drug prevention and treatment. You can choose to spray 500-800 times of 50% carbendazim wettable powder or 400-600 times of 40% ethylphosphine aluminum wettable powder, spray once every 7-10 days, and spray 3 times in a row.

The landlord did not explain the specific condition, and there are the following references:

Yellowing of leek heart or outer leaves**:

Soil acidification leeks like neutral soil, long-term application of a large number of manure, cake fertilizer, manure and ammonium sulfate, superphosphate and other acidic fertilizers, will cause soil acidification, so that leek leaves grow slowly, slender, outer leaves yellow.

Harmful gases are harmful to the application of a large amount of ammonium bicarbonate before the shed, or the application of urea on the ground behind the shed, and the application of ammonium sulfate on the alkaline soil, all of which are easy to produce ammonia and cause ammonia damage. In addition, if there is too much accumulation of nitrite acid, nitrite gas damage will occur.

When the indoor temperature of the shed is above 35 for a long time, and the air is relatively dry, it is easy to cause leaf burning. Sometimes the continuous cloudy day is followed by a sudden sunny day, or the sudden invasion of cold air after high temperature, will make the leek leaf tips and even the whole leaf turn white or yellow withered.

trace element imbalance, zinc deficiency, yellowing of heart leaves; Calcium-deficient heart leaves yellowed, and some leaf tips died; magnesium deficiency outer leaves yellowing and death; Boron deficiency center leaves yellow, too much boron leaf tip die; The central leaf of manganese excess is slightly yellowed, and the outer leaf is yellowed and died. The control methods were Henan 791, Mashang leek, Hanzhong winter leek, broad-leaved leek and other varieties with strong resistance (tolerance). Rational use of manure and fertilizers.

Manure should be fully decomposed and applied in moderation. Top application of sulfur, iron, ammonium bicarbonate, urea and other chemical fertilizers, do not use too much at one time, do not sprinkle on the ground, to prevent sprinkling on the leaves. When a deficiency is found, micronutrient fertilizer or compound micro-fertilizer can be sprayed on the root of the disease.

Strengthen temperature and humidity management, and the temperature should not be higher than 35 or lower than 5.