Diseases and pests of cucumbers

diseases and pests of cucumbers Blog

Cucumbers are one of the most popular vegetable crops, and with the right care, they give rich harvests. They require good nutrition, frequent watering, temperature control and protection from fungal diseases and insects.

This is a fungal disease that affects all gourds, but especially cucumbers and melons. Downy mildew occurs with strong fluctuations in daily temperature. Appears as a grayish or white coating on the leaves. The spots are small at first, then the disease spreads throughout the leaf and soon dies. The disease can affect entire shoots.

It looks like light yellow oily spots on cucumber leaves. The ideal environment for the spread of the disease is continuous rainfall at a temperature of 18-23 degrees Celsius.

Disinfection of seeds before planting is a good prevention of downy mildew and downy mildew. To do this:

① Place the seeds in hot water (about 50 degrees).

② Leave in water for about 25 minutes.

③ Immerse in cold water for 3 minutes.

If the cucumbers are already sick, remove the infected leaves first. Then sprinkle cucumbers with safflower infusion. The recipe is as follows: 1 kg of cow manure is poured into 3 liters of water. The solution is infused for 3 days, then the cucumber bushes are sprayed. If there is no manure, it can be replaced with hay or leaves. Treat the plant weekly.

Cucumbers in the greenhouse suffer from this disease. The first stage is indistinguishable from a healthy plant. Fusarium is most noticeable during the fruiting period. In hot weather, the tops of diseased cucumber plants fall off. The stems wither and dry out. The process is very fast, and the plant dies before our eyes.

It is impossible to cure a plant affected by Fusarium. In this case, only preventive measures can help:

✔seed disinfection;

✔spraying seeds with Trichodermin before planting;

✔water the cucumbers with warm water.

A very common disease caused by high humidity, sudden changes in temperature and poor ventilation of the greenhouse. White rot affects all parts of the plant. It looks like a white slimy coating that gradually completely covers the plant and kills the cucumbers. The spores are easily transferred to other plants by using tools or hands.

Spraying an infusion of cow dung and diluted dairy can help prevent white rot. The milk solution is prepared as follows: dilute milk or other dairy products (kefir, whey) with water in a ratio of 1:10, add iodine in an amount of about 5-10 drops. Cucumbers can be sprayed with a solution once every 7-10 days.

This disease is typical for seedlings and seedlings. The affected shoot turns yellow and growth forms on the root collar. The disease develops at low temperatures and high humidity.

To avoid infection, do not sow the seeds close to each other, ventilate the greenhouse, water the seedlings with warm water and prevent the temperature from dropping below 20 degrees. To prevent black rot, it is necessary to grow seedlings in peat pots, and before planting, disinfect the wells with a solution of manganese (5 g per 10 l).

✎ Note! Sprinkle the grate with charcoal, chalk, or ash for general prevention of cucumber fungus.

In addition to fungal diseases and weather conditions, cucumbers can also be affected by insects. The most common of these are aphids, spider mites and whiteflies. Birds, frogs and lizards get along well with them, but sometimes they need help. For this, plants are sprayed with infusions and decoctions.

Planting fragrant plants will help repel pests:





✔velvety grass.

Aphids affect all garden crops and flowers. This small yellowish insect and its larvae settle in large colonies on the leaves of plants, feeding on juicy pulp. Cucumbers affected by aphids inhibit growth, turn yellow and die.

✎ Note: Aphids carry fungal diseases.

Spraying aphids with infusions and decoctions of garlic ✔; ✔garlic; ✔garlic:





✔onion peel.

Before processing, add laundry soap diluted in water to the decoction. Plants are sprayed every 5-7 days until the pests completely disappear. If there are few aphids, then cucumbers can only be treated with soapy water.

The insect is oblong, about 0.4 mm long. Tick ​​larvae and adult insects live on the outside of cucumber leaves. A leaf wrapped in a tick’s web dries out gradually.

Infusions are suitable for getting rid of pests:




✔peel of lemon, orange, mandarin.

Grass should be filled with water and infused for several days until the smell disappears. Then dilute with water (20 parts of water to 1 part of the infusion) and water the bushes.

✎ Note: The treatment should be carried out before watering to avoid burning the vegetable crop.

This insect is so named because of its white, powdery wings, which make it easily recognizable. The whitefly settles on the lower leaves of the plant and eats their flesh. This neighborhood will lead to the gradual death of the stems. A spray bottle with water will drive away the pest. After watering, the soil around the bush should be loosened and covered with peat or sand.

For preventive purposes, the leaves of the cucumber plant should be covered with ashes or crushed charcoal.

How to increase the yield of cucumbers

To get a rich crop of cucumbers, pest control is not enough, it is also necessary to properly care for the crop. To bear good fruit, cucumbers must be grown regularly:

✔fertilize the soil well;

✔pour warm water;

✔landing dates are met;

✔protect from direct sunlight.

Another “cucumber” problem is the bitterness of fruits. The accumulation of bitterness comes from:

✔rare watering;

✔sudden changes in air temperature;

✔poorly fertilized or loamy soil;

✔poorly fertilized or loamy soil; ✔strong sunlight.

Proper care, plant care and pest control will help ensure a good harvest of delicious crunchy cucumbers.

To grow a decent crop of cucumbers, you need not only to choose the right variety, but also to buy a greenhouse! Factory “Volya” offers a wide range of frames made of polycarbonate and foil. Good prices from the manufacturer!

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