Why do cucumber leaves turn white after planting in the ground and what to do

Cucumbers are a fairly common vegetable crop that most vegetable growers like to plant in their dachas and greenhouses. During cultivation, some face many different problems. This vegetable does not respond well to poor ventilation, inappropriate temperatures and insufficient light. Because of all this, the leaves of the seedlings of cucumbers turn white.

Why do cucumber leaves turn white

If cucumbers have white spots, then you should deal with the causes of their occurrence. There are some of the most common causes of leaf discoloration.

Lack of light

Sometimes after planting cucumbers in the ground, white leaves appear due to poor lighting. Often this problem appears when planting in a greenhouse, but sometimes it occurs in the open field. Due to the lack of light, the lower leaves begin to lighten. If all the other leaves do not begin to change their color, then you should not worry. After all, the lower leaves almost always lack light due to the fact that the cucumbers grow too thickly.

Moisture

Another reason why cucumber leaves turn white is a lack or excess of moisture. Most often, because of this, leaves of cucumbers that grow in vegetable gardens begin to turn white, since it is not always possible to control humidity on the street. In summer, in some regions, too much precipitation falls and this leads to the fact that the leaves of the cucumbers turn white. Also, high humidity adversely affects the root system of plants. Over time, the root begins to rot and the bush gradually dies.

Lack of moisture also causes the tips of the leaves to lighten and begin to dry. To get rid of this problem, it is enough just to water the seedlings more often.

Nutritional deficiency

Seedlings of cucumbers in the greenhouse and on the street may become covered with light spots due to insufficient nutrients. This reason is much rarer than all the others.

If the bush brightens and dries up from below, then this indicates a lack of potassium or magnesium. Therefore, as soon as possible, fertilizing containing these components should be introduced into the soil.

When stems with cucumber leaves are also covered with dark veins, the plant lacks manganese with iron. With an insufficient amount of copper, the leaves located in the upper part of the bush first lighten and dry.

Aging

Any plant begins to age over time, which is why the process of photosynthesis gradually slows down and each leaf slowly dries and fades.Natural old age occurs only after the harvest of the entire crop. Therefore, if the bush began to dry earlier, then this was not due to aging, but for some other reason.

Pests

If white spots began to appear along the edges of the sheets, then you should think about the fact that there are pests on the site. Often, the bush dries out due to spider mites or whiteflies. These insects feed on juice, which they suck out from cucumber leaves. Together with the juice, they also suck out nutrients, which leads to lightening of the leaves.

When insects appear, bushes and gardens should be treated with special preparations. To do this, you can use folk remedies or effective pesticides.

Diseases

Most often, it is precisely because of diseases that the seedlings of cucumbers dry out on the site. Most diseases manifest themselves in the same way. At first, the cotyledon leaves are covered with small spots, which increase with time.Then the affected leaves gradually curl up and fall off.

If the plant is affected by Fusarium, then the bush becomes lethargic a few days after infection and does not respond to watering. Almost all cucumber diseases appear after warm sunny weather is abruptly replaced by cold and heavy rains.

Ways to fight

Having figured out why the leaves of the seedlings turn white, you can start treatment. Inexperienced vegetable growers do not know the features of the proper cultivation of cucumbers and what to do when their leaves have brightened. If the cucumber leaves turn white, then you need to immediately get rid of this problem. To do this, it is recommended to use special preparations that will help get rid of pests and the most dangerous cucumber diseases.

Quadris

This tool allows not only to treat bushes from diseases, but also to protect them from the recurrence of diseases in the future.It is recommended to process cucumbers with Quadris in the evening or in the morning, when there is no strong wind outside. After the first treatment, the drug immediately penetrates the whitened leaves and removes all pathogens from them. Quadris also prevents the germination of spores in the initial stages of the disease.

During treatment, about 100-200 ml of the drug should be spent on each plant. The procedure is carried out three times during the cultivation of cucumbers. In this case, the interval between each use of Quadris should be at least 3-5 weeks.

Kuproksat

White leaves of cucumbers in the greenhouse or in the garden can be treated with Kuproksat. This drug was specifically released to protect vegetables from insects and diseases. The product is sold in large plastic containers, with a volume of about 10-20 liters. The liquid can be used immediately after purchase. It is recommended to apply Kuproksat before planting cucumbers in the soil.

The fact is that the drug is more effective if it is used before pathogens and spores enter the leaflets.

Kuproksat should fall not only on the edge of the brightened sheet, but also on its entire surface. In order for the product to be evenly distributed over the plant, it is necessary to spray the liquid in calm weather early in the morning.

Jet

If, after planting, the cotyledons began to gradually lighten, then they can be treated with Jet fungicide. The drug is sold in the form of a powder, from which you will have to prepare a working solution in advance. To do this, add about 100 grams of fungicide to 10 liters of water. Then the mixture is stirred and infused for 20-40 minutes. The prepared solution should be used almost immediately, as it is not suitable for long-term storage.

Jet should be used twice a month. At the same time, spraying will have to be repeated before harvesting.

Folk remedies

Some vegetable growers, when cucumbers begin to turn white and wither, do not use drugs, but folk remedies.

Onion peel

To protect cucumbers from parasites and pests, products made from onion peel are often used. To prepare a medicinal mixture, it is necessary to mix 300 grams of husk with 5-7 liters of water. Then the container is placed on a gas stove and brought to a boil. The prepared mixture is infused for 10 hours, after which it can be used to treat plants. The product can be used not only for spraying leaves, but also for watering the soil.

Whey

Kefir with milk whey is recommended to be used when the tops of cucumbers have turned white. To prepare the working mixture, 7 liters of water and 2-3 liters of whey or kefir are added to a 10 liter container. Some people add some sugar to the mixture to improve the yield of cucumbers.

Bread loaf

To prepare a loaf mixture, you need to soak a few loaves of bread in a large container of water. It should be soaked for at least 12 hours. After that, a spoonful of iodine and 10 liters of water are added to the liquid. The prepared mixture is recommended to be used twice a month so that the leaves always remain green.

Conclusion

Cucumber leaves turn white quite often. To get rid of this problem, you should figure out why this happens on cucumbers in a greenhouse and what needs to be done to treat plants.

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