The melons are about to be picked, but the leaves are gone

Lack of water or the end of life.

Hello, caused by fertilizer damage, soil fertilizer damage, air damage should be irrigated in a timely manner, so that the plant can recover various physiological functions as soon as possible, and maintain a certain temperature in the shed. Foliar sprays of Harvest No. 1 and potassium dihydrogen phosphate. Heavy promotion of root nourishment, irrigation of roots with rooting agent, can also be flushed with humic acid, microorganisms and other fertilizers to promote rooting.

As far as I know, it is caused by Fusarium oxysporum in melons, which belongs to the subfamily Semifungi, and the typical symptom of the disease is wilting, which can occur throughout the growth period of melons, but is most severe in the flowering and fruiting phases. In the early stage of the disease, 300 500 times of 5% salicylamide wettable powder can be used.

600-800 times 3% oxamine EC; mancozeb wettable powder 700 times liquid; 2000 times of 70% oxafen wettable powder; Irrigate with water, 250 ml of liquid medicine per plant, once every 7 days depending on the condition, a total of 2-3 times.

Stem rot caused by soil-borne diseases, continuous cropping or application of incomplete livestock and poultry manure, and soil moisture can occur most often, and according to reliable knowledge, there should be many pathogenic strains, and there is no good control method. Try applying a fungicide to see if it relieves it. After a period of rainfall and cooling, when the shed temperature drops, the evaporation of leaves weakens, the water absorption capacity of the roots decreases accordingly, and the ground temperature will further decrease.

At this point, the root system absorbs water = the leaves evaporate. When the weather suddenly clears, the temperature of the greenhouse rises rapidly and the evaporation of the leaves also increases rapidly, at this time, the evaporation of the leaves is much greater than the water absorption of the roots.

When the seedlings have their first true leaves, the daytime temperature is kept between 25 and 35, but the nighttime temperature cannot be lower than 15. When the melon seedlings are unearthed, the temperature requirements are high. Only by keeping the bed temperature between 25-30 degrees can the seeds emerge smoothly.

Before the emergence of seedlings to cotyledons, it is necessary to prevent high temples and cataplexy caused by high temperature and humidity, and take cold protection measures at night.

The root system of seedlings is sensitive, and the immature organic fertilizer, especially chicken manure, will cause crops to burn their roots; The application of adulterated fertilizer caused crop root damage and deficiency of celery; Excessive fertilization leads to high soil fertility, which endangers crop roots. The suitable temperature of the melon root system is mainly 15 20, and too low a temperature will also cause the root system of melon seedlings to be fragile and easy to die.

It may be infected by a germ, it may be root rot, it may be bacterial wilt. It may be that the seedlings are malnourished.

When planting melons, root diseases, improper fertilization, pesticide damage, improper operation of plastic film and other factors can lead to yellow leaves. In recent years, fruit cultivation has become a dominant industry in the agricultural economy, and fruit greenhouse cultivation is on the rise across the country. Among them melon is represented.

Melons are loved by most agricultural growers because of their low cultivation costs, high yields, and good sales.

But growing melons is not that easy. At the beginning of planting, melons often have yellow leaves. Yellow leaves will not only affect the normal growth of melons, but also the growth of melons.

The fruiting rate has a decisive impact on the harvest of melon growers. Therefore, it is necessary to understand the causes of yellow leaves in melons from the source and analyze specific problems to solve the problem of yellow leaves in melons. All plants absorb nutrients from their roots, and the same goes for melons.

If the roots of the melon are diseased, yellow leaves will appear. For example, when irrigation melon seedlings every day, too much water can lead to excess soil moisture, and its roots will rot, melon seedlings will not be able to absorb nutrients from their roots, and yellow leaves will appear, so it is essential to strictly control the amount of irrigation water for melon seedlings and keep soil moisture within the normal range.

Many melon growers use compound fertilizers to promote the growth of melons. The main components of compound fertilizers are nitrogen fertilizers, potassium fertilizers and phosphate fertilizers. But melon, as a special cash crop, does not lack the three elements nitrogen, potassium and phosphorus.

In the process of growing melons, there is no need to over-fertilize. If you want to speed up the growth of melons, you can use some organic fertilizers appropriately. Organic fertilizers do not cause melon seedlings to appear yellow leaves and can also promote the growth of melons.

Many melon growers are now using plastic greenhouses.

Plastic greenhouses can provide good temperature conditions for the growth of melons, but plastic film also has certain disadvantages. It will lead to the inability to release heat in the soil and the appearance of yellow leaves of melon seedlings. Farmers who grow cantaloupe with plastic film must remove the plastic film in time to allow the heat in the soil to escape and provide enough carbon dioxide for growing melons.

The main reason is that the melon does not get enough light at the seedling stage, so the yellow leaves appear.

It may be because of the lesion that the yellow leaves appear, you can go to see if there are insects in the ground, or because there is too much water shortage, so the yellow leaves appear.

The most important reason is the lack of nutrients and the lack of timely watering, so there will be yellow leaves.

Normal, continuous rainy days, resulting in long-term soaking of the root system in water, damage to the root system, suddenly sunny days, plants carry out photosynthesis, root nutrient delivery is blocked, so the leaves wilt.

It's normal, if the wind is always sunny and the air is cool, and suddenly the sun comes out, how can the vegetation adapt to it.

Hello, dear, there are many reasons for the yellowing of melon leaves, it may be a lack of nutrients, and it should be treated with top dressing in time during the growth period to ensure that all aspects of nutrients are sufficient. It may also be infected with a disease, and leaf blight is common. After finding, clean up the diseased leaves in time, and spray drugs.

It may also be that the fertilization is too much, and the roots and yellow leaves are burned. Thin fertilizer should be applied diligently to supplement the fertilizer.

Hello dear, it's like this, there are many reasons why melon leaves are yellow, such as malnutrition, overwatering, abnormal climate, etc. Different measures can be taken to solve the problem for different reasons. First of all, it is necessary to rule out the yellowing of the leaves caused by improper watering, if it is due to watering or excessive watering, you need to reduce the amount of watering to avoid damaging the root system of the melon.

Secondly, it is necessary to pay attention to the application of fertilizers, the lack of necessary nutrients can cause the leaves to begin to turn yellow. Nutrients can be supplemented by appropriately increasing the application rate of organic fertilizer and fast-acting fertilizer. Third, if pests and diseases cause the leaves to turn yellow, corresponding control measures need to be taken in time.

For example, insecticides are used to control pests, and fungicides are used to prevent and control the infection of germs. Finally, it is necessary to pay attention to cleaning up the weeds and withered melon leaves in the field in time to keep the field environment clean and tidy. At the same time, it is also necessary to pay attention to adapt to the local climatic conditions and avoid excessive exposure to strong sunlight, so as not to cause melon leaf burns or a large amount of evaporation of water, resulting in yellowing of the leaves.

If the above measures are still ineffective, it is recommended to seek the help of professional agricultural technicians for more comprehensive and scientific diagnosis and treatment.

Summary. Pro: Hello, your question is what to do if the leaves of the melon are yellow? <>

Lack of water: Melons have leaf distribution characterized by the fact that, except for the interrupted period, most of the time they need constant water to support the normal development of the leaves, and if the water is insufficient, the leaves will turn yellow. 2.

Internal blockage: When the water in the soil is not permeable enough, it is difficult for water to enter the leaves from the roots, causing the development of the leaves to be affected, at which point the leaves turn yellow. 3.

Nutrient deficiency: Melon leaves will also turn yellow, if the nutrients are insufficient and seriously imbalanced, the leaves will gradually turn yellow, or even fall off. Therefore, if you want to solve the problem of yellowing leaves, you must start with the above points:

1.Keep the soil moist: Irrigate regularly to keep the soil moist.

2.Pay attention to supplementing nutrients: melons like to supplement a certain amount of phosphorus, nitrogen, potassium, calcium and other nutrients during the vigorous growth period.

3.Carry out weeding: Weeding prevents fertilizer consumption and maintains a mix state while also aiding groundwater infiltration.

In addition, in the process of fertilization, attention should also be paid to application control to avoid root disorders caused by excessive fertilization of melons, and to retain the balance between nutrients such as nitrogen, phosphorus and potassium to avoid yellowing of leaves.

What to do if the leaves of a melon are yellow?

Dear We are happy to answer for you, and the following are the results for your query;

Pro: Hello, your question is what to do if the leaves of the melon are yellow? <>

Lack of water: melons have leaf distribution characterized by the fact that, in addition to the interrupted period, most of the time constant water is needed to support the normal development of leaves. 2.

Internal blockage: When the water in the soil is not permeable enough, it is difficult for water to enter the leaves from the roots, causing the development of the leaves to be affected, at which point the leaves turn yellow. 3.

Nutrient deficiency: Melon leaves will also turn yellow, if the nutrients are insufficient and seriously imbalanced, the leaves will gradually turn yellow, or even fall off. Therefore, if you want to solve the problem of yellowing leaves, you must start with the above points:

1.Keep the soil moist: Irrigate regularly to keep the soil moist.

2.Pay attention to supplementing nutrients: melons like to supplement a certain amount of phosphorus, nitrogen, potassium, calcium and other nutrients during the vigorous growth period.

3.Weeding: Weeding prevents fertilizer consumption and maintains a mix state, and acacia also helps with groundwater infiltration.

In addition, in the process of fertilization, attention should also be paid to application control to avoid root disorders caused by excessive fertilization of melons, and to retain the balance between nutrients such as nitrogen, phosphorus and potassium to avoid yellowing of leaves.