Phytophthora on cucumbers: how to process and is it necessary?

What summer resident does not want to grow a good harvest on his plot. But sometimes late blight on cucumbers prevents normal growth and the formation of ovaries on the bushes. Pathogens are difficult to remove from the soil, especially if the condition of the bushes is neglected. Most often, late blight appears in greenhouses and greenhouses, but the appearance of a fungus in open ground is not uncommon.

Signs of late blight

In order to save cucumbers from late blight, you need to notice the disease in the beds in time.

Signs of late blight on cucumbers:

• The appearance of dark spots on the leaves.
• Leaves begin to curl and eventually fall off.
• The stems and fruits turn black.
• Cucumbers begin to rot and decay.
• There is an unpleasant odor.
• The ovaries stop forming.

Late blight is also called rot. The main danger of this disease is that it is quickly transferred throughout the site. From infected plants, rain washes away some of the fungi, which then enter the soil. The same thing happens when watering. If fungi get into the soil, they remain there for a long time. Plants planted in such a plot are later infected with late blight.

Causes of late blight on cucumbers

Late blight can appear on cucumbers for various reasons. Most common:

• Through infected seeds.
• Excess lime in the soil.
• During storage of harvested fruits.
• If the plant lacks air for various reasons.
• Decrease in plant immunity.
• Sudden temperature changes throughout the day.

Errors of summer residents that lead to the appearance of late blight on the site:

• Wrongly organized watering.
• Water plants with a hose.
• Leave infected crops on site.
• Neglect disease prevention.

Sometimes it is difficult to answer why the cucumbers began to dry out and the fruits to rot. But if this happens, you need to start treatment as soon as possible.

How to process cucumbers from late blight?

There are two ways to get rid of phytophthora on the site:

• Chemical.
• Biological.

Chemical method - involves the use of chemicals that are aimed at the destruction of the fungus. But this method is considered harmful to human he alth.

You can process bushes with Bordeaux liquid. This is a time-tested tool that will help you quickly remove fungi from the site without damaging the crop.

The main thing is to get the proportions right, if the liquid is too concentrated, the leaves and stems will get burned and start to dry out.

How to spray cucumbers with Bordeaux mixture:

• 20 ml of 0.5% Bordeaux mixture diluted in 3 liters of water. Spray bushes in the evening when the sun is not so bright.
• Second treatment is required to consolidate the results. For this, they take already 1% liquid and dilute it in 4 liters of water. Cucumbers should be processed 15 days after the first processing.

If the treatment did not help, it must be repeated every 15 days until late blight disappears.

Positive results are obtained by processing cucumbers with copper oxychloride. Treatment with this remedy will help get rid of phytophthora in a short time.

From late blight there are the following drugs:

• Barrier.
• Hom.
• Barrier.
• Oxychom.

You can buy them in specialized stores. After spraying with these products, cucumbers should not be eaten for a month until all chemicals come out of the fruit.

Use chemicals for spraying should be careful. For a person, such substances can be dangerous, so you can not carry out procedures if it is windy outside. Otherwise, some of the chemicals may get on a person.

Folk methods of dealing with the disease

Cucumbers need a lot of space so that phytophthora does not begin to develop. If the bushes are planted too close, then they are more likely to start to hurt.

How to deal with late blight with folk recipes:

• Infusion of garlic. 100 g garlic cloves and leaves minced. Pour 10 liters of water. Insist for a day. Then strain and add 2 g of potassium permanganate to the strained infusion. It is necessary to spray the bushes with infusion before the formation of ovaries. The second spraying - 10 days after the first. Thereafter - every 14 days.
• S alt solution. Use s alt as needed. It creates a protective layer on the leaves, which prevents the occurrence of phytophthora. For 10 liters of water, take 1 glass of s alt. Stir.

• Sprinkling with kefir. The beds are treated with kefir a week after the seedlings are planted in the soil. Then the procedure is repeated every week. Dilute 1 liter of kefir in 10 liters of water (whey is also used). Leave the infusion to ferment for 2 days. After 2 days, it is mixed and the beds are processed.
• Yeast. At the first sign of the disease, cucumbers are sprayed with yeast. Take 100 g of yeast, dilute in 10 liters of water and insist for a day. Then add 30 ml of iodine.
• Wood ash. No less effective in the fight against late blight wood ash. It is used after the seedlings take root in a new place, before the start of the flowering period of cucumbers and at the first sign of the appearance of ovaries. Mix 1 bucket of water with 500 g of ash. Leave the solution to infuse for 3 days. Stir regularly all this time. After 3 days, add another 20 liters of water and 40 g of laundry soap.Spray several times per season.

It should be noted that spraying with a solution of kefir and s alt will not help get rid of an already existing disease. These are rather preventive procedures that will help avoid infection of the site with fungi.

Prevention against disease

Preventing a disease is much easier than treating it. You need to do preventive work in the spring, a few weeks before planting seedlings in the soil.

How to prepare the ground:

• Water the beds with a solution of copper sulfate.
• Dig.
• Then pour the soil again, but this time with Fitosporin (1 tbsp. Means for 5 liters of water).

In addition to these procedures, it is important not to overfeed cucumbers with mineral and organic top dressings, plant crops according to crop rotation rules and remove weeds from the site in time. You should constantly remove old leaves, on which the fungus most often appears.

You need to choose for planting such varieties of cucumbers that are immune to late blight. A large number of such hybrids have now been created. If the bushes grow in a greenhouse, you need to constantly ventilate it, open the windows.

Onions and garlic are planted next to the cucumber beds. The substances that are in these cultures destroy the pathogenic environment.

If late blight has already appeared, cucumber bushes protect against moisture during rains. To do this, the beds are covered with a waterproof film. Even before planting seedlings, mulch is applied.

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