Why the leaves turn yellow cucumbers. What to do?

Why the leaves turn yellow cucumbers. What to do? With such questions, gardeners turn to search engines when the problem is clearly visible. But wait to raise a panic. After all, often everything is fixable, and the cucumbers can still be saved.

The only difficulty is an accurate diagnosis of why the leaves turn yellow. Sometimes it is difficult to determine the real cause. Well, it is necessary to act by the method of elimination and periodically turn on the head. Then exactly everything will work out.

Below we consider the most common options for changing pigmentation and tell you what to do in this situation.

Wrong watering

Since childhood, many people know that cucumbers love water. That is poured to stupor and how much is not a pity. But such an elementary procedure as watering should be carried out according to all the rules.

The plant is thermophilic. In regions of origin of cucumbers rarely cold rains.Mostly warm water pours from the sky. So our cucumbers need to drink some warm water. And then some will lower the pump into the well and let's pump ice flows to the beds. Try to stand under such a shower. I hardly like it.

That cucumbers turn off the small feeding roots, so as not to chill. And the leaves and fruits require water. It turns out that even being in an icy slush of soil and water, the plants dry. Leaves will yellow with this care quickly.

Another situation. Water for irrigation is warm, but it is not enough. Instead of high-quality drinking 3 times a week, the owners every day, little by little, sprinkle from a watering can. Topsoil is wet all the time. And at a depth of 8-12 cm, where the bulk of the roots is located, there is dryness. It turns out again dried cucumbers.

Or another extreme. Watered cucumbers with warm water, often a lot. Well, it would seem, what else do you want? Air access to the roots is necessary. They can not work constantly for wear, they also need to be periodically ventilated. And how, if the "legs" in the warm swamp swim?

All sorts of root system sores begin, insidious rot attacks. Roots gradually die off. The leaves turn yellow, the owners think that the plants do not have enough water, and pour more. The problem is exacerbated.

What to do? To begin to water properly.No one will tell you the exact amount of water per plant or frequency. And do not listen to all these "25 liters of water per bush with every watering." How can advisers know what the weather or climate is in your area? On what type of soil and under what conditions your cucumbers grow - they also do not know.

The best reference point is your bed. They came, spread the tops, looked. If it is not clear, then you can pick it up. Is it wet? Set aside watering! Dry? So it's time to give cucumbers a drink. That's all science.

Sunburn

Continuing the theme of water, we will tell about the great error. Absolutely all sources strictly prohibit watering cucumbers in the heat from above. Ostensibly sprinkling provokes sunburn and massive yellowing of the leaves.

Sorry, but yellowing leaves provoke your negligence and unwillingness to work with brains. Look at your watch cucumbers at 14. What is it like? That's right, on sagging rags. This sun evaporates the remnants of moisture from them, and then dries to a state of straw. Hence the burn.

What to do? Save! Urgently help cucumber plantings to endure the solar mockery! Directly on top of the leaves sprinkling need to refresh the landing.This reduces the temperature of the sheet, saturates it with liquid and increases the humidity of the air around it.

And do not about the drop-lenses. If the shovels are saturated with water and their temperature is low, then your terrible lenses need a lot of effort to damage the surface of the sheet. By the way, after the rain, too, the sun often roasts. How many blazing plants have you seen in your life?

Pests

These little enemies suck up all the nutritious juices from the leaves of cucumbers, gnaw up the root system, devour the stems. As a result, the plant becomes weak, there is a lack of food, the leaves turn yellow.

Additional feeding will not do anything. First you need to identify treacherous guests, then get rid of them, and only after all help cucumbers recover.

What to do? Each type of pest needs its own method of control. No doubt, it is possible to sadanut them with a decent dose of insecticide. Only then how to eat cucumbers? After all, they quickly mature, do not have time to get rid of the poison.

Exit 3, both harmless to humans and animals:

1. Use all sorts of decoctions and infusions of strongly smelling natural ingredients.These are onion husks, tansy, mint, valerian, marigolds, garlic husks. You just need to periodically spray the affected cucumber leaves with a diluted liquid. It is advisable to thoroughly wet the underside of the leaves. It is there that the largest gathering of uninvited guests is observed.
2. Traps. It is possible with a poisonous bait. The pests will eat enough and the paws will be safely folded back, and the cucumbers will definitely not be consumed. If you do not want to use poison, then you simply collect the insects by traps and give them to the neighbors or to their chickens. Take out of the plot and destroy. Dig in very deep into the ground. Ways full.
3. Novelty in the insecticide market. With prefix bio. Can be used to get rid of all kinds of harmful insects. It is a conglomerate of spores of the fungus and predatory nematode. The small predator attacks pests and infects them with fungus. That, in turn, quickly grows on the internal organs of the insect and kills it. Everything about everything takes from 4 hours to days.

The only minus of option 3 is strict adherence to instructions. It clearly outlines the conditions and time of storage of the drug, as well as the temperature range in which the bioinsecticide works most efficiently.

Cold

The banal reason - temperature jumps during the day. For example, it is hot during the day, and at night it is already cold. This usually happens in August. Roots of cucumbers cease to function normally in the cooled ground. And the overgrown tops and pouring fruits require food in the usual dose. What remains to the plant? That's right, take the supply of nutrients from the leaves. Mugs start to turn yellow, then they dry out and die.

Reinforced feeding will not bring proper results. No matter how much nutrition is brought into the soil, the cucumber is not able to assimilate it.

What to do? To make foliar top dressing, preferably with nitrogen, and build up new roots. This is done very simply. First, almost all lashes are dripped to a length of up to 30 cm. It is necessary to sprinkle the whole thing on moist, loose soil. It is recommended at first to water the place prikopki solution of rooting stimulator. This will allow the cucumber to quickly grow new roots, which will help the bush to assimilate the proper amount of nutrition.

And on the leaves will need to spend 2 feeding, with an interval of 5-7 days. To do this, 10 liters of pure water take a matchbox of ordinary urea (no top) or 2 tbsp. lpharmaceutical solution of ammonia. Thoroughly mix the resulting liquid and from the soul sprayed planting cucumbers.

We advise to carry out such dressing early in the morning or in the evening. Then the leaves and shoots will have time to absorb most of the fertilizer.

Lack of power

By the way, about fertilizers. Their lack may also be the cause of the yellowing of the leaves of the cucumber. Some gardeners are categorically opposed to the use of chemistry in their backyard. Of course, biological liquid green fertilizer is a good thing. Cucumbers take it with a bang. But for the normal growth and development of the menu should be full.

Agree, it is difficult to constantly eat only one nitrogen. Other microelements are also needed. For example, potassium, manganese, iron, boron, phosphorus, molybdenum, zinc. In small quantities, but still a cucumber without them can not normally exist. And a natural person can not provide the right amount of food. And on one nitrogen from the greenery the plants will be loose, watery and the fruits will grow tasteless. The leaves will first be lush, green, but not for long. Then they quickly lose their attractiveness and turn yellow.

What to do? Feed up. We go to the store. Choose any complex mineral fertilizer. We read carefully the content of microelements. We choose where is less nitrogen and more other substances. We buy, we carry home. There once again carefully read the instructions for use, especially the manufacturer's recommendations. Clearly follow all the requirements.

We intentionally do not give here the dosage and frequency of application of mineral fertilizers. Because each complex of microelements has its own, and it is impossible to guarantee something remotely. But believe me, your cucumbers will respond to you with such gratitude, great harvest and beautiful green leaves.

Diseases

This is the most common cause of yellowing cucumber leaves. None of the above listed types cause such harm as spores of pathogenic fungi and pathogenic bacteria. They are waiting for your plants at every step and stage of development.

It all starts with contaminated planting material and spoiled soil. Then pests bring various viruses on their paws. Cool wet weather provokes the growth of fungi.In the greenhouse or greenhouse on the supports and walls can be bacteria from last year. Enumerate all the dangers can be long. Describe the method of dealing with each disease - the book is not enough.

What to do? Follow general guidelines. This alone increases the chances of your cucumbers not to drop the skates (yellow leaves) at times.

Before sowing seeds in the ground or on seedlings, they should be disinfected. Better than a strong hot solution, potassium permanganate has not yet come up with anything. Planting ground is cleared of bacteria by deep freezing or roasting in the oven.

In the greenhouse (greenhouse) every year should be replaced at least the top layer of soil on a new one. If you can not do this, you should certainly shed the earth with potassium permanganate or phytosporin solution. Arcs, frames, supports, wall and ceiling material must be treated with a fungicide solution or at least fumigated with a sulfur smoke checker. Tobacco copes too well.

The best protection against diseases and fungal rot is prevention:

1. Strict adherence to crop rotation. Many people neglect this, but in vain. In the soil, bacteria tend to accumulate. And the constant, from year to year, planting of melons in one place is an indirect cause of yellowing of the leaves.
2. Periodic inspection of cucumbers for suspicious stains or strips.And the majority of gardeners begin to beat the drums only when the cucumbers signal the mass yellowness of the shovels.
3. Regular preventive spraying of bushes with any fungicide of biological origin. Modern industry offers a great many. We will not call here, so as not to advertise, but if you wish, you can find the name and instructions.

Biofungicides are absolutely harmless to people, animals and insects. They do not even require gloves. And the value is invaluable.

If, nevertheless, they have missed and the disease has already begun its triumphant march, then quickly get rid of the sick cucumber or put it in quarantine. It is possible that the remaining bushes have not yet had time to become infected. But it is better not to risk it.

The affected plant must be pulled out by the roots, taken out of the area and burned. The soil under it should be immediately disinfected. Such a measure will allow you to sleep at ease.

After reading this article, you won’t be worried about why the leaves of cucumbers turn yellow. What to do? - you know too. Take a closer look at your plants and your good yields.

Video: what to do so that the leaves of cucumbers do not turn yellow