Processing greenhouses from phytophthora in autumn


Treatment of diseases is the most important process in the pre-winter preparation of greenhouse soil. To process a greenhouse from phytophthora in the fall is very important to get the next year a full crop, not damaged by diseases. You can make such processing in several ways, but there are basic rules that must be followed.

Signs of phytophthora appearance in the greenhouse

Phytophthora is a dangerous disease that affects many cultivated plants, most often solanaceous. Care for the greenhouse in the fall after late blight requires serious efforts to prevent serious complications for the future harvest. After harvesting, spores of phytophthora are stored in the upper parts of the soil, where they can successfully survive the winter season until the next season. The first signs of this fungal disease are the appearance of brown spots on the leaves of cultivated plants, as well as white bloom at high humidity indoors.

If you do not fight the disease, then phytophthora can fully harvest tomato, potato and many other plants. Therefore, the processing of the greenhouse after phytophthora in the fall is very important to destroy all disputes that exist in an enclosed space, as well as on its structure and in the soil.

What is dangerous this disease

The fungus phytophthora eventually spreads to the entire crop. Leaves gradually turn brown, dry and curl. If the gardener is going to save the crop, he often removes green tomatoes from the bush and lays them on ripening. In fact, this does not help, because the tomatoes in the box are also infected with the fungus, like other fruits. If you do not process the space in the fall, then the next crop will also spread the mycelium of the fungus and the yield will drop significantly, up to complete destruction.

How to process a greenhouse after phytophtoras in the autumn

Preparation for the new season occurs immediately after harvest. You can handle special chemicals, as well as biological agents and temperature regimes. You can use both the proposed tools separately, and apply a complex effect. Soil treatment from phytophtoras in the fall in the greenhouse is necessary in the form of a whole series of measures both to combat and prevent disease.

How to deal with blight in the greenhouse in the fall with chemicals

First of all, it is necessary to properly prepare the enclosed space after harvesting. Only after preparation can you use chemicals to fight the fungus. For chemical processing should be used:

  • hydrated lime;
  • bleach;
  • concentrated solution of blue vitriol;
  • sulfur checkers;
  • chemical fungicide.

Each of the presented preparations is recommended to be used correctly in order to process the greenhouse for the winter from phytophthora:

  1. Sulfur fumigation. Conducted special checkers "Climate", "Fas", as well as "Volcano". Described in detail in the instructions how to use these checkers.
  2. Copper sulphate is required to be diluted in the ratio of 100-150 grams per 10 liters of water. Then with the composition, whiten all the places where pathogenic microflora is observed and there is a danger of infection.
  3. Slaked lime. Mix 4 kg of freshly lime with 0.5 kg of copper sulphate and 10 liters of water. To whiten the entire greenhouse, including brickwork and all places where pathogenic flora can form.
  4. Bleaching powder. A solution is made of 1 kg of dry matter per 10 liters of water. Insist for an hour and spray the entire room.

In addition to all known solutions, various universal fungicides are successfully used. They are used strictly according to the instructions that are attached to the fungicide for sale. The most common method is tillage in the greenhouse in the fall with phytosporin.

How to treat the greenhouse after phytophthora in autumn with biological preparations

Biological fungicides can be used to treat small spaces. These drugs are based on the natural ability to suppress pathogens. But these drugs have their own condition - they work only at a temperature of 12-14 ° C above zero.

The following drugs are most commonly used:

  • "Trichodermin";
  • "Bactofiton";
  • "Fitosporin".

The treatment consists in dissolving the preparation, according to the instructions, the whole room is sprayed with water and this solution. After 14 days, spraying is repeated.

Tillage in the greenhouse in the fall from phytophthora

The best option for the treatment of soil is its change. This business is troublesome, but it relieves the fungus completely and for several years. Great for small spaces.

To carry out such a procedure, annually, sometimes 2 times a year, remove 20 cm of soil, take it to a specially prepared site. It mixes soil with dry leaves, and also adds compost. Each layer of this blank should be searched with special solutions, for example, "Trihoplant". This soil can be used again in a greenhouse after 2 years. Only he will give a much larger crop and will not contain pathogenic microflora.

And it also helps to sow sideratov, for example, white mustard in the autumn before winter. In the spring, mustard will rise and in one season will disinfect the entire soil in the greenhouse, since it will suppress all pathogenic microflora.

The processing of a polycarbonate greenhouse in the fall from phytophtoras includes watering with a bright pink solution of potassium permanganate, followed by digging up the soil on a spade bayonet and planting siderats.

Temperature control method of late blight in the greenhouse

Like many other species, the phytophtora fungus can live only in strictly defined temperature regimes. Therefore, to get rid of the pathogenic microflora, it is necessary to radically change the temperature regime in the greenhouse.

After harvesting at the onset of frosts and cold weather, it is recommended to clear the greenhouse from spores by freezing. To do this, it is necessary to open the greenhouse space for several days at the lowest possible temperatures. If snow falls, it is recommended to remove it from the surface of the soil, since zoospores can survive under a layer of snow and become more active in the spring.

As well as pathogenic microflora does not tolerate well and temperatures above 35 ° C. In the autumn of such a temperature for the greenhouse does not create, and therefore good to handle it with boiling water.

How to get rid of phytophthora in the greenhouse in autumn: a set of measures

In order to protect their harvest in the next year in full, experts recommend treating the greenhouse until the fall with a set of measures. First of all, after harvesting, prepare the soil. First you need to remove all the tops, old foliage, as well as broken structures, remnants of twine, which tied up the plants.

After that, depending on the material from which the room is made, disinfection is carried out. Sulfur drafts, hydrated lime and other disinfection methods can be used.

It does not hurt to treat the greenhouse with phytosporin in the fall, especially if the infection was large-scale.

Caring for a greenhouse in the fall after late blight is excellent if you add store fungicides to the ground, but you should strictly follow the instructions and all the proportions so as not to harm the person. All spraying procedures should be carried out in a respiratory mask to prevent toxic chemicals from entering the respiratory tract.

Preventive measures against phytophtoras in the greenhouse

There are a few rules, following which it is possible to avoid infection with the latent crop in the greenhouse:

  • do not plant cultivated plants too thick;
  • it is recommended to mulch the soil;
  • bushes must be tied up without fail;
  • clean stepchildren and extra leaves.

With the observance of all the necessary preventive measures, as well as with the creation of the correct microclimate, the gardener will be able to avoid the appearance of pathology and crop damage.


To process a greenhouse from phytophtoras in the fall is an important and necessary exercise, especially if there are signs of contamination in the greenhouse this season. Processing can be carried out with the help of chemicals, biological fungicides, as well as temperature regimes. The processing of the greenhouse from phytophthora in the fall is well shown in the video, so even a novice gardener can handle it.