Why do cucumbers turn yellow and how to deal with it?

Yellowing cucumbers are a sign that something is wrong with the plant. In this case, the plants turn yellow in the greenhouse, and in open ground, and even on the balcony.However, not every person knows why this happens and how to solve the problem.

There are many explanations why cucumbers turn yellow. In addition, the leaves and ovaries of plants that have recently sprung up, and even fruits, can turn yellow.

Therefore it is necessary to familiarize yourself with all the main reasons.

• When the first shoots appeared, the lack of light can give the plants yellowness.
• If the volume of the cup in which the seedlings are grown is not large enough, the roots of the plant will intertwine and will not receive adequate nutrition.
• The color may be affected by a lack of nitrogen in the soil.
• If the soil does not receive the proper amount of water or, conversely, it is too much of it.
• After planting, plants can catch a disease such as powdery mildew or root rot. As a result, even spots may appear on the seedlings.
• Cucumbers have a great influence on low temperature. If it is below 17 degrees, then the root system of the plant will not be able to obtain the necessary nutrients from the earth.
• Cucumber seedlings are often sick for a long time due to transplanting to another place.

When there is no fruit yet, the leaves of plants can also turn yellow.

Here are some of the main reasons for this.

• It is often seen as the edges of the leaves dry up. This is a sign of the appearance of pests such as the spider mite or aphid.
• The earth can be depleted, that is, it lacks substances such as magnesium or iron, as well as other useful elements.
• The reason for the yellowness of the leaves may be in the excess fertilizer.
• Improper watering can be another cause of this phenomenon. Do not use too cold water for irrigation. You must also ensure that water droplets do not wet the leaves.

If it was found that the ovary on the site yellowed, then this, too, there are explanations.

• If self-pollinated varieties were acquired, lack of pollination, that is, the absence of bees or other insects, may be the cause of the yellowing of the ovaries.
• Yellow and hybrid varieties of cucumbers, which form a lot of germs at once. In these cases, the plant is heavily overloaded and can not give proper development to small cucumbers.

Changing the color of the fruit occurs for the same reasons that were discussed above. This is improper watering, and the influence of various insects and common diseases, and lack or excess fertilizer. The reason for the yellowness of the fruit is often the wrong choice of location. If cucumbers were planted in the area where any melons and gourds were grown, then cultivation will have problems. Both pests and bacteria that are inherent in these crops can remain in the ground.

Also, cucumbers can simply burn out in the scorching sun. Yellowness appears from the large density of plantings. In this case, the plant does not receive adequate nutrition. People who do not have the opportunity to plant this crop in open ground, also face this problem. True, the yellow fruits are no longer from the sun. But all other reasons are relevant and within the greenhouse.

To harm the bushes can and good intentions of man. To cucumbers are not yellowed, you need to water them properly. If indoors it can be done at any time, then garden plants should be supplied with water either in the mornings or in the evenings. Otherwise, water droplets that fall on the leaves, can work as a lens and burn the leaves of the plant, and this will significantly affect the growth of the fruit.

But most of all harmful insects and diseases affect the condition of the fruit.

• The whitefly insect resembles a very small moth. It is characterized by great fecundity. In the shortest time the whitefly can breed such offspring, which will completely destroy the entire crop. Therefore, only after seeing that the cucumbers began to turn yellow, it is necessary to immediately begin the fight against these pests. It is possible to apply both chemical preparations, and any folk remedies.
• Aphid often gets on the plants due to the fact that they are surrounded by weeds. From the first turn the leaves turn yellow, then the ovary, and then stops the development of the fruits themselves. They first turn yellow and then completely die.
• Root rot - the most common disease that destroys not only cucumbers, but also many other vegetables. First you can see how the plants are covered with white bloom, and after rot infects the whole bush and fruits. The cause of this disease is often high humidity, which also leads to a change in the color of the fruit.

• Bacteriosis often causes yellowing of the fruit. It begins from the strong and frequent watering of bushes with cucumbers. Excess moisture in the earth gives life to various harmful microorganisms. To remove excess moisture from the soil, it is necessary to conduct daily ventilation of the greenhouse. Also, in some cases, it is worth making grooves so that the water flows along them. Bacteriosis can also occur due to the strong density of plantations. Therefore, planting plants too close to each other is impossible.
• Powdery mildew can be last year’s leaves or weeds. This is especially possible if they have already been infected with powdery mildew. To notice it will not be so difficult. After all, the leaves first turn white, covered with an unsightly bloom, and then change color to yellow. After some time, the patina becomes gray-purple. It is during this period that the fruits become unsightly yellow.
• Infectious disease Fusarium affects both leaves and fruits at the same time. As a result, they turn yellow. Infection of plants begins from the ground. The fungus enters it through the root system, as well as through the stems and in a similar way spreads throughout the plant.

To combat the yellowing of cucumbers, you can use many ways. Some of them are permissible to use only in the greenhouse, others can be applied on the open ground.

Cucumbers are quite moisture-loving plants and therefore they feel the lack of water very keenly. Therefore, they must be watered regularly. However, with a strong excess of moisture the plant may turn yellow. When planting cucumbers, it is imperative to take into account the fact that the earth must be well hydrated when the fruits only grow. This is especially important in the period of active ripening of cucumbers. Also, do not use cold water for irrigation, because it can lead not only to yellowing, but also to dropping ovaries.

Water must be poured only under the root of the plant. This is done to avoid burns. It is necessary to do watering in the morning or in the late evening. It is advisable not to part with this. Enough to water the bushes three times a week. In case of drought, watering is done every day.

Sometimes the lack of lighting causes poor growth of cucumbers. Therefore, planting this plant in the greenhouse, it is necessary to take this into account. To plant hybrid cucumbers, it will be enough to plant one seed per square meter. If cucumbers that pollinate bees are selected, then two or three seeds must be planted in the same area. If you do not adhere to such schemes and sow the seeds too thick, then when the cucumbers grow, the rows will be too frequent. As a result, it can affect the fruits of cucumbers. They will not receive proper lighting, and therefore will acquire a yellowish tint. However, strong illumination can adversely affect them. Therefore, during a drought, plants need a little shade from the scorching rays of the sun.

Such a process as the formation of the bush also has a great influence on the number of fruits, as well as their quality. It begins with the removal of all the elements of conception that are in the leaf axils. Their number depends primarily on the plant variety.If cucumbers are planted by those that pollinate the bees, then it will be enough to remove three shoots. For hybrid cucumbers, you must remove up to eight shoots. In the future, they should be removed as soon as they grow. If you miss the right moment, the bushes will interfere with the full development of their "neighbors".

Even a good gardener can not insure their crops from any temperature extremes. And growing cucumbers under the film will not solve the problem. After all, during the day, the film passes heat inside, and the temperature there can reach even forty degrees. At night, the air in the film greenhouse cools down and the temperature drops very sharply. From this differential cucumbers can immediately turn yellow. To prevent this from happening, the plants should be hidden under an additional layer of protective material. For this fit Agrotex or lutrasil. You also need to consider what temperature is suitable for growing parthenocarpic plants and those that are pollinated by bees.

For the first type of cucumber, the temperature before they start fruiting should be:

• from twenty-two to twenty-four degrees in good and clear weather;
• twenty to twenty-two degrees in case of cloudy weather;
• between seventeen and eighteen degrees at night.

When the period of fruit begins, then the temperature should be:

• from twenty-three to twenty-six degrees - in sunny weather;
• from twenty-one to twenty-three degrees - on rainy and overcast days;
• from eighteen to twenty degrees - at night.

When planning to grow plants in the open field, for the beginning it is very important to ensure the future harvest with good and suitable soil. The ground should be sufficiently loose, slightly moist, and also provided with the right amount of nutrients. Otherwise, the cucumbers will turn yellow. On any site possible imbalance of nutrients. After all, when watering a plant, various elements are washed out of the ground, including nitrogen or potassium, which are so necessary for plants.

To determine what substance is not enough cucumbers, you need to consider the signs:

• if yellow leaves appear on the leaves, the plant lacks potassium;
• when shoots are thinned - plants are nitrogen deficient;
• if there is a yellow border on individual sheets - this is a lack of magnesium.

Therefore, in order to prevent this from happening, it is necessary to regularly feed the plant with the necessary fertilizers. This is especially true of the period when the fruiting season begins. A very effective remedy at this point will be feeding with different herbal tinctures. In order for the bushes not to become infected with diseases, for example, fusarium, bacteriosis, or ascochytosis, preventive maintenance must be carried out regularly. Here you can apply the biological drug "Trichodermin", which is safe for people and livestock. He copes with fungus and simple diseases. You can also apply Bordeaux mixture.

But if diseases like bacteriosis or tobacco mosaic appeared on the garden, then the plants will have to be disposed of, and the soil treated with a formalin solution. After all, such a disease on cucumbers is not treatable. In the fight against such diseases can also be used folk remedies.

Here are some interesting recipes.

• It is necessary to take twenty grams of soap (preferably liquid, but you can also just rubbed and diluted with water), one liter of fresh milk, thirty drops of pharmacy iodine and all pour ten liters of water. Such a mixture, you can begin to process the cucumbers, when they appear four leaves. You need to repeat everything in ten days.
• In ten liters of water to dilute 1 tablespoon of baking soda. Such a mixture, thanks to its composition, will relieve the bed from the attacks of many insects.
• Half a bucket of onion peel is filled with ten liters of boiled water. The fluid must be infused for ten hours. Then it is necessary to filter and dilute the composition with water in a ratio of two to eight. It is necessary to spray not only cucumbers, but also the soil under them.
• Two liters of serum should be mixed with ten liters of water. Such a mixture must be treated plants, barely noticing the symptoms of any fungal disease. If one hundred and fifty grams of sugar is added to this mixture, this will significantly increase the number of fruits on the bushes.
• Seven liters of water should be mixed with three liters of whey, add ten grams of copper sulfate and mix the solution well. With it, you can get rid of the powdery mildew.

Insects can also harm crops. As a preventive work with any pests need to get rid of weeds. At the end of the season, it is necessary to clean and cultivate the area where the cucumbers were planted. If, however, such methods do not help, it is necessary to treat the plants with chemicals. Treat cucumbers can and folk remedies.

The following solutions or tinctures can be used to kill various pests.

• Forty grams of chopped hot pepper should be mixed with 200 grams of tobacco dust. Then you need to add ten liters of clean water there and leave everything for 10 days. After this, the tincture must be drained and add to it two tablespoons of liquid soap and the same wood ash. Tincture cope with insects such as spider mites or aphids. The treatment must be re-performed after seven days.
• Two hundred grams of crushed garlic must be poured with ten liters of water. Need to insist five days. After that, you need to pour sixty grams of tincture into a bucket of water and stir well. Such a solution can be used against whitefly. They can also be washed off with ordinary water directly from the bushes.
• Four kilograms of potato tops must be poured with ten liters of hot water. It is necessary to insist such a solution for four hours. After that, you need to add forty grams of liquid soap. Spraying helps from aphids and mites.

When the cucumber season ends, it is imperative to remove all plant residues from the bed and burn them. The land where cucumbers grew should be treated with a solution of fifty grams of copper sulfate and half a bucket of water. For the next season, another plant should be planted in this place. Very good, if it is cabbage or tomatoes.

Every year, growing cucumbers is becoming increasingly difficult. In almost every garden you can see the yellowness on the fruit. However, the reasons for its appearance are always different.

About why cucumbers turn yellow and what to do about it, see the next video.