What to do if spots appear on the leaves of cucumbers?

Gardeners often face plant diseases, but not everyone knows how to deal with them. One of them is the appearance of spots on the fruits and leaves of cucumbers. Let's talk about this in more detail today.

Spots on cucumber leaves are a common problem, and their appearance threatens with loss of yield. In the article on the photo, we will consider spots on cucumbers, the reasons for their appearance, methods of treatment and prevention.

What are the spots on the leaves of cucumbers

There are several types of leaf spots... If you define them correctly, then the treatment will be effective.

White

The appearance of white spots does not depend on where the cucumbers are grown. The leaves are covered with a white coating in the form of a mosaic with a corresponding disease.

Powdery mildew Is a more harmless cause of stains, which occurs most often in wet weather. A whitish bloom attacks the stem and leaves. With the development of the disease, the affected areas begin to dry out.

When a plant is damaged by a spider mite white dots appear on the outside, and a small cobweb on the back.

Yellow

With bacteriosis of cucumber first, watery formations are noticeable, then, over time, yellow spots appear on the outside. If the disease progresses, the color turns brown with a yellow rim.

The cause of the appearance of yellowish spots is often - nutritional deficiencies... In this case, drying and yellowing occurs first of the lower, and then the rest of the leaves.

The problem may be caused by burn or hypothermia of the plant... Sometimes a yellowish spot begins to form at the point where the leaf is in contact with the glass in the greenhouse.

Brown

The most common cause of brown plaque is fungus.... With anthracnose, depressed spots appear on the leaves, stem, and fruits. If the disease is not eliminated in time, holes will appear.

With ascochitis first, gray watery spots appear, then they turn brown, then dry. This disease often affects greenhouse cucumbers.

Downy mildew Is a common cause of plaque. Initially, light green spots gradually turn brown.

Black

If dark spots are found, then, most likely, the state of the plantings is neglected: there was irregular watering, insufficient lighting and no top dressing.

Important! Remember that plants love to be cared for - if not cared for, they will wilt.

Oily

Oily stains on the leaves occur with bacteriosis or olive spot.

Dry

When dry leaves are found, most gardeners are sure: this is due to insufficient watering. Of course, this is a common cause, but dry spots also cause diseases, fungus.

For example, with Alternaria, the leaves become dry and brown... Plants in the greenhouse planted closer to the exit are usually affected, but the disease quickly spreads to all others.

Causes of stains

Treatment of spots on cucumbers is quite possible if the cause of the plant disease is correctly established.

Insufficient illumination

Lack of light on the lower leaves - you should think about lighting. Probably, the landing is too dense, which means that the light enters unevenly.

Improper watering

If watering is insufficient, then yellow areas will appear on the bush, the same will happen with an excess of it. In the summer the culture is watered about three times a week... On dry days, plants cannot be left without watering.

Fertilizer deficiency

If feeding haphazardly, the condition of the cucumber bush will deteriorate sharply. If the shape of the fetus has become dumbbell-shaped, it means that there are not enough superphosphates. With dry leaf edges, magnesium and potassium are added to the garden bed.

Viral and bacterial diseases

When infected areas of a cucumber are found, the reasons may be not only light, watering and fertilization, but also damage to the culture by diseases and pests. Viral and bacterial diseases most often cause the appearance of spots, wilting of the bush.

Fungal diseases

If the plant is affected by a fungus, then it covers the leaves with a bloom.eventually they dry up and wither. The cause of the appearance of the fungus is often a sharp change in temperature.

Pests

Cucumber juice attracts spider mite and whitefly... If they attacked the plant, then the bush turns yellow and dries up. It is possible to stop the wilting of the plant if the pests are destroyed.

Crop rotation rules

Often diseases affect plants that are planted from year to year in the same place.

Treatment

Any crop has a disease risk and a pest risk. If you notice the problem in a timely manner, then you can save the plants.

Chemicals

Treatment of plants is effective both with chemical agents and folk remedies. The choice of drug or solution depends on the situation, preferences and opportunities.

"Topaz"

They are treated with powdery mildew on cucumber bushes... It helps with fungal diseases, for the prevention of diseases. Non-toxic, safe for human health. It is usually sold in liquid or powder form. The working solution is prepared using 10 l of water and 10 g of the drug.

"Hom"

Effectively helps in the fight against fungal diseases... It is sold in the form of a green powder. The solution is prepared from 5-7 liters of water and 30 g of the product. Use it once a week, in calm weather.

"Zircon"

Effective both to protect bushes and to accelerate their growth... Use it in any growing season of cucumbers. The peculiarity of the product is safety, since it includes only elements of plant origin. To prepare a solution, 2-5 liters of water are poured into a container, 25 g of the drug are added, and mixed. They use it once a week.

"Oxyhom"

The drug is used when brown spots are detected.... He protects the bush and heals it. Has a long healing effect. Sold in powder form. The solution is prepared in a 10 liter container filled with water and mixed with 20-40 g of the product. Used once every two weeks.

Folk remedies

Among the well-known among gardeners, such methods of struggle:

1. For a solution against diseases, 1 liter of milk, 30 drops of iodine and 20 g of laundry soap are often mixed. Everything is thoroughly mixed, the plants are sprayed with the mixture.
2. Grind 50 g of garlic, dilute in 1 liter of water. The mixture is insisted for a day, then filtered, diluted in 9 liters of water.
3. One glass wood ash pour 2 liters of boiling water, insist for two days. Separately, 10 g of laundry soap is dissolved in water, then added to the solution.

Timing and frequency of treatments

Plants are treated every 10 days throughout their growth period and development. Cucumbers are sprayed with wood ash about twice a week.

Preventive measures

Fighting disease is difficult, hassle and time-consuming.

Important! To preserve the harvest, follow agricultural practices and timely prevent diseases.

Diluted in water, heated milk whey in proportions 1: 7 effectively acts as a prophylaxis. Also, if you put two handfuls of onion husks in a bucket of water, boil for half an hour, wait for the solution to cool, strain and dilute with water in a 2: 1 ratio, you will get an effective mixture, which is periodically poured over cucumbers from a watering can.

Conclusion

Now you know why dark spots appear on cucumbers and what to do in this case.

If spots are found on cucumber leaves, do not despair and immediately destroy the bushes. If you understand and understand the reason for their appearance, then the landing can be processed and cured.The main thing is to know the intricacies, follow the rules of agricultural technology, carry out disease prevention even in a greenhouse or a greenhouse, then the harvest of cucumbers will surely please you.