What to do if spots appear on cucumber leaves?

Gardeners often encounter 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. Today we’ll talk about this in more detail.

Spots on the leaves of cucumbers are a common problem; their appearance threatens the loss of the harvest. In this photo article we will look at spots on cucumbers, the reasons for their appearance, methods of treatment and prevention.

What are the spots on cucumber leaves?

There are several types of spots on leaves. If they are identified correctly, then the treatment will be effective.

White

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

Powdery mildew – a more harmless cause of stains, which occurs most often in humid weather. A whitish coating attacks the stem and leaves. As the disease progresses, the affected areas begin to dry out.

When a plant is damaged by spider mites White dots appear on the outside, and a small cobweb appears on the back.

Yellow

For bacteriosis of cucumber At first, watery formations are noticeable, then, over time, yellow spots appear on the outside. As the disease progresses, the color becomes brown with a yellow rim.

The reason for the appearance of yellowish spots is often - nutritional deficiency. In this case, drying and yellowing of first the lower and then the remaining leaves occurs.

The cause of the problem may be plant burn or hypothermia. Sometimes a yellowish spot begins to form where the leaf comes into contact with the glass of the greenhouse.

Brown

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

For ascochytaosis First, gray watery spots appear, then they turn brown, then dry out. This disease often affects greenhouse cucumbers.

Downy mildew - 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 fertilizing.

Important! Remember that plants love care - if there is a lack of care, they begin to fade.

Oily

Oily spots on leaves occur with bacteriosis or olive spot.

Dry

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

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

Causes of spots

Treating spots on cucumbers is quite possible if the cause of the plant disease is correctly determined.

Insufficient lighting

Lack of light on the lower leaves - you should think about lighting. Probably, the planting is too dense, which means the light gets in unevenly.

Improper watering

If there is insufficient watering, then yellow areas will appear on the bush, the same will happen if there is an excess of it. During the summer the crop is watered about three times a week. On dry days, plants should not be left without watering.

Fertilizer shortage

If you apply fertilizer haphazardly, the condition of the cucumber bush will deteriorate sharply. If the shape of the fruit has become dumbbell-shaped, it means there is not enough superphosphates. When the leaf edges are dry, add magnesium and potassium to the bed.

Viral and bacterial diseases

When infected areas of a cucumber are discovered, the reasons may be not only light, watering and fertilizers, but also damage to the crop 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, it covers the leaves with a coating, they eventually dry out and wither. The cause of the appearance of fungus is often a sudden change in temperature.

Pests

Cucumber juice attracts spider mite and whitefly. If they attack the plant, the bush turns yellow and dries out. It is possible to stop the wilting of the plant if you destroy the pests.

Crop rotation rules

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

Treatment

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

Chemicals

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

"Topaz"

It is used to treat 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 liters 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 product. Use it once a week, in calm weather.

"Zircon"

Effective both to protect bushes and to accelerate their growth. It can be used during any period of the cucumber growing season. The peculiarity of the product is safety, since it contains only elements of plant origin. To prepare the solution, pour 2-5 liters of water into a container, add 25 g of the drug, and mix. 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 product. Use once every two weeks.

Folk remedies

Among the methods of struggle known among gardeners are::

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

Timing and frequency of treatments

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

Preventive measures

Fighting diseases is a difficult process that causes a lot of trouble and takes time.

Important! To preserve the harvest, follow agricultural practices and carry out disease prevention in a timely manner.

Whey diluted in water and heated in proportions of 1:7 effectively acts as a preventive measure. Also, if you put two handfuls of onion peels in a bucket of water, boil for half an hour, wait for the solution to cool, strain and dilute with water in a ratio of 2:1, you will get an effective mixture, which is periodically watered with cucumbers from a watering can.

Conclusion

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

If you find spots on cucumber leaves, do not despair and immediately destroy the bushes. If you look into it and understand the reason for their appearance, then the planting can be treated and cured. The main thing is to know the subtleties, follow the rules of agricultural technology, carry out disease prevention even in a greenhouse or greenhouse, then the harvest of cucumbers will definitely please you.