What happens to yellowing leeks? What is the disease of leeks, yellow

The reasons for the yellow leaves of leeks are as follows:

1. Lack of trace elements: Generally, when leeks are planted, the lack of trace elements such as iron, copper, and zinc will cause them to appear yellow leaves;

2. Partial application of nitrogen fertilizer: In order to make leeks grow fast and shorten the growth cycle, some vegetable farmers apply nitrogen fertilizer in the fertilization process, ignoring the fertilization of other fertility, resulting in an imbalance in the proportion of nitrogen, phosphorus and potassium fertilizer, inhibiting the absorption and utilization of other elements by the root system, resulting in yellow leaves;

3. Excessive application of acidic fertilizer: excessive application of acidic fertilizer during fertilization will acidify the planting soil, hinder the growth and development of the root system, and the absorption of nutrients and water will not be smooth, so that the leeks will be malnourished and cause yellow leaves;

4. Do not apply organic fertilizer: some vegetable farmers will apply chemical fertilizer when fertilizing, but not apply organic fertilizer or farm fertilizer, resulting in the continuous decline of trace elements in the soil, resulting in soil compaction and poor permeability, affecting the respiration and absorption of the root system, resulting in yellow leaves, and in severe cases, causing a large area of death.

Many factors can cause the leaves of leeks to turn yellow. If it is caused by improper watering, it is necessary to drain water if it is too much, and if it is too little, it is necessary to increase the number of waterings. If it is caused by over-fertilization, it is necessary to dilute the fertilizer in the potting soil by watering, or to depot the roots and rinse them, and then replant.

If it is caused by insect infestation, it can be sprayed with high-efficiency and low-toxicity insecticides, such as trichlorfon powder, phoxanthion emulsifiable concentrate, etc.

1. Improper watering.

1.Reason: The amount of watering needs to be controlled, if the watering is too frequent and the soil is overwhelmed, resulting in root injury, the leaves will have some yellowing. If there is not enough water, it will lead to a lack of water, and the old leaves will show signs of dry yellowing.

2.Treatment: If there is too much water, stop watering and draining immediately if it is not serious. If it causes root rot, it needs to be cut off and replanted. If there is too little water, you need to water it in time and replenish it gradually.

2. Excessive fertilization.

1.Reason: The fertilizer required for the growth of leeks is limited, and if the fertilizer is applied too much, the root system cannot be completely absorbed, burning the root system, resulting in yellowing of the leaves.

2.Treatment: It is necessary to use watering to irrigate the soil, discharge the excess fertilizer, or rinse the roots, and then change the soil and replant. At the same time, it is important not to use too much acidic fertilizer.

3. Causes of insect pests.

1.Causes: The main insect pest of leeks is leek maggots, which will damage the plant, resulting in reduced root absorption capacity, yellowing of the leaves, and even plant death in severe cases.

2.Treatment method: High-efficiency and low-toxicity insecticides, such as trichlorfon powder, phosphine emulsifiable concentrate, etc., can be used to reduce the harm of leek maggots.

There are many reasons why leeks turn yellow. The temperature difference is too large, and the high temperature and high humidity are easy to cause the yellow leaves of leek leaves to dry and tip. Poor air circulation, poor ventilation, and the dry tips of yellow leaves caused by poison gas poisoning caused by air damage caused by planting in protected areas.

Improper fertilization, serious soil acidification, excessive topdressing causes excessive concentration of soil solution, resulting in root burning, and will also make the yellow leaves of leeks dry and tipped. Soil calcium deficiency, boron deficiency, and excessive manganese caused by dried yellow leaves of leeks. Dry tip yellow leaves caused by leeks and thrips.

Leek blight, gray mold, sclerotinia sclerotinia disease, viral disease, etc.

It may be dehydrated or frozen.

The yellowing of leeks can be caused by:

1.Blight: It is the most common disease of leeks, which can cause the leaves of leeks to turn yellow, and in severe cases, it will lead to the death of the whole plant.

2.Botrytis cinerea: It can cause leeks to produce rotten leaves, rotten roots, and die of the whole plant.

3.Rust: Another common disease of leeks, which causes the leaves of leeks to turn yellow.

4.White silk disease: It can cause the leaves of leeks to turn yellow, and in severe cases, the whole plant will die.

5.Black spot disease: It can cause the leaves of leeks to turn yellow, and in severe cases, the whole plant will die.

6.Stem blight: Causes yellowing of leek leaves.

7.Soft rot: can cause the leaves of leeks to turn yellow.

8.Viral disease: can cause yellowing of leek leaves.

The above are some of the reasons that may cause leeks to turn yellow, if your leeks have turned yellow, please contact the local agricultural production department or hospital as soon as possible for diagnosis, so as to take the correct method in time.

One is too much fertilization, causing the phenomenon of "burning" roots, which leads to yellowing of leaves, remedy: less fertilization, the principle of fertilization should master the principle of light application and diligent application. The second is the lack of fertilizer, remedy:

Apply sufficient decomposed base fertilizer, and the principle of fertilization is that the ratio of organic fertilizer and inorganic fertilizer is not less than 1:1. The third is the obstruction of plant root respiration caused by waterlogging, resulting in leaf yellowing.

Remediation: Do a good job of drainage in a timely manner.

There are many reasons why leek leaves are dry and tippy:

1.Long-term application of large amounts of ammonium sulfate, superphosphate and other chemical fertilizers will acidify the soil, cause acid damage, and easily lead to dry shoots of yellow leaves.

2.A large amount of urea was applied before the detainment of the shed, which caused excessive ammonia accumulation in the shed, resulting in ammonia damage, which was manifested as growing by dry shoots.

3.Long-term exposure to high temperatures above 35, sudden sunny weather, or sudden cold wind invasion after high temperatures, holding lead will make the leaf tips or even the whole leaves turn white or yellow.

4.Deficiency or excess of trace elements can also cause leaf tips to dry out. Calcium-deficient central leaves turn yellow, and some of the apicals die.

Magnesium deficiency can cause the leaves to turn yellow and die. Boron-deficient central leaves turn yellow, while boron-excess leaf tips die. The excess manganese leaves are slightly yellow in the center, and the peripheral leaves turn yellow and die.

5.The harm of leek maggots and thrips.

6.Hazards of leek blight, gray mold, sclerotinia and viral diseases.

Comprehensive measures should be taken to control the dried and pointed yellow leaves of leeks. Pay attention to all aspects of cultivation management. Pay special attention to urea, ammonium bicarbonate and other fertilizers should not be applied too much at one time, and should not be spread on the ground.

Pay special attention to high temperature hazards, timely ventilation, and proper irrigation. If trace element deficiency is found, it should be sprayed outside the root in time.

The reasons for the yellow leaves of leeks are as follows:

1. Lack of trace elements: Generally, when leeks are planted, the lack of trace elements such as iron, copper, and zinc will cause them to appear yellow leaves;

2. Partial application of nitrogen fertilizer: In order to make leeks grow fast and shorten the growth cycle, some vegetable farmers apply partial nitrogen fertilizer when fertilizing, ignoring the fertilization of other fertility, resulting in an imbalance in the proportion of nitrogen, phosphorus and potassium fertilizer, and inhibiting the absorption and utilization of other elements by the root system, resulting in yellow leaves;

3. Excessive application of acidic fertilizer: excessive application of acidic fertilizer during fertilization will acidify the planting soil, hinder the growth and development of the root system, and the absorption of nutrients and water will not be smooth, so that the leeks will be malnourished and cause yellow leaves;

4. Do not apply organic fertilizer: some vegetable farmers apply chemical fertilizer when fertilizing, but do not apply organic fertilizer or farm fertilizer, resulting in the continuous decline of trace elements in the soil, resulting in soil agglomeration and poor permeability, which affects the respiration and absorption of the root system, resulting in yellow leaves, and in severe cases, it causes a large area of auspicious filial piety to die.

There are many reasons for the dry tips of yellow leaves of leeks

1. Long-term application of a large number of chemical fertilizers such as ammonium sulfate and superphosphate will acidify the soil and cause acidic hazards, which can easily cause dry tips of yellow leaves.

2. A large amount of urea is applied before buckling the shed, so that excessive ammonia gas accumulates in the shed and causes ammonia damage, which is manifested as the growth of the top dry tip.

3. If the temperature is above 35 C for a long time, the weather is cloudy and suddenly clear, or the cold wind suddenly invades after the high temperature, the leaf tip or even the whole leaf will turn white or yellow.

4. Trace lack or excess of nutrients will also cause leaf dry tips. The calcium center is yellowed, and some leaf tips die. Magnesium deficiency outer leaves yellowing and dying. Boron deficiency centers yellow, while boron deficiency causes leaf tips to die. The central leaf of manganese excess is slightly yellowed, and the outer leaf is yellowed and died.

5. The harm of leeks and thrips.

6. The hazards of leek blight, gray mold, sclerotinia and virus disease.

Comprehensive measures should be taken to prevent and control the dry tips of yellow leaves of leeks. Pay attention to all aspects of cultivation management. Special attention should be paid to urea, ammonium carbonate and other chemical fertilizers can not be applied too much at one time, and should not be sprinkled on the ground.

Special attention should be paid to the hazards of high temperature, timely ventilation, and appropriate amount of irrigation. If it is found that there is a lack of micro-hand cavity elements, it should be sprayed outside the root in time.

Summary. Hello, long-term application of a large number of fertilizers such as ammonium sulfate and superphosphate leads to acidification of the soil and causes acidic hazards, resulting in yellowing of leeks.

What is the reason for the yellowing of leeks?

Hello, long-term application of a large number of fertilizers such as ammonium sulfate and superphosphate leads to acidification of the soil and causes acidic hazards, resulting in yellowing of leeks.

No chemical fertilizers were used, only sheep manure was used.

Ventilation is good, too. Leeks are at a high temperature of more than 35 °C for a long time, and then the weather suddenly becomes cloudy or cold wind suddenly invades, causing the tips of leeks and even the whole leaves to turn white or yellow; trace amounts of absence from vegetarian deficiency or excess; Harmed by leek maggots and onion thrips.

It is also possible to turn yellow for this reason.

Hello dear. The following reasons; 1. Lack of trace elements: Generally, when leeks are planted, the lack of trace elements such as iron, copper, and zinc will cause them to appear yellow leaves;

2. Partial application of nitrogen fertilizer: In order to make leeks grow fast and shorten the growth cycle, some vegetable farmers apply nitrogen fertilizer in the fertilization process, ignoring the fertilization of other fertility, resulting in an imbalance in the proportion of nitrogen, phosphorus and potassium fertilizer, inhibiting the absorption and utilization of other elements by the root system, resulting in yellow leaves; 3. Excessive application of acidic fertilizers

Excessive application of acidic fertilizer during fertilization will acidify the planting soil, hinder the growth and development of the root system, and the absorption of nutrients and water will not be smooth, and the leeks will be malnourished, resulting in yellow leaves. 4. Do not apply organic fertilizer: some vegetable farmers apply chemical fertilizer when fertilizing, and do not apply organic fertilizer or farm fertilizer, resulting in the continuous decline of the micro-tan elements in the soil, resulting in soil compaction into lumps, poor permeability, affecting the respiration and absorption of the root system, resulting in yellow leaves, and in severe cases, causing a large area of death.

5. Improper watering: excessive and blind watering makes the field humid or soil waterlogged, the soil permeability is poor, and the root system can not breathe normally, resulting in malnutrition and yellow leaves. 6. Pests and diseases:

Many pests and diseases will cause leeks to appear yellow leaves, and in severe cases, they will die normally.