Disinfection of a polycarbonate greenhouse in autumn

Disinfection of a polycarbonate greenhouse in autumn

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You can wash a polycarbonate greenhouse in the fall using various means. Some are sold ready-made in specialty gardening stores, while others can be diluted and prepared on your own. It is only important that washing and disinfection be done, since a fairly large amount of toxins, as well as harmful microflora and pathogens of various infections, accumulate on the walls and frame during the season.

Greenhouse maintenance after harvest

Polycarbonate greenhouses appeared relatively recently, but quickly gained popularity among both amateur gardeners and agricultural producers. Polycarbonate is quite strong, durable and reliable, and a lightweight frame made of a shaped metal pipe makes the entire structure mobile. Nevertheless, during the gardening season, dirt, insect waste products, various pathogenic microflora accumulate on the walls and supporting elements, which multiply intensively in conditions of high temperature and humidity.

Autumn greenhouse care includes several mandatory activities. These include:

  1. Cleaning of tops, fallen leaves, plant residues after fertile crops.
  2. Digging up the soil, cleaning weeds and larvae of insect pests.
  3. Disinfection or soil replacement.
  4. Washing the walls and supporting structures of the greenhouse.
  5. Disinfection of the inner surface of the greenhouse.

If the shelter is not used in winter, various auxiliary systems can be dismantled, if any have been installed (lighting, drip irrigation, etc.). The less cluttered the interior space, the easier it will be to wash and disinfect it.

Do I need to care for the greenhouse

If you do not wash the polycarbonate greenhouse in the fall and remove all organic residues from it, next year the greenhouse crops will be provided with a whole bunch of various diseases. It is very important to carry out a kind of general cleaning at this time, while disinfecting not only the greenhouse soil, but also all the elements of the structure.

When is the best time to clean the greenhouse: in autumn or spring

Washing and disinfecting a polycarbonate greenhouse is best done in autumn. This is due to many factors. One of them is free time, which is much more in the fall, which means that all processing and disinfection work can be carried out slowly and with the desired quality.

It is also important that chemicals that can be used for washing and disinfection, even if they get into the soil before spring, are guaranteed to decompose and will not cause any harm to future crops.

Do I need to wash the greenhouse after harvest

The time after harvesting in autumn is the most optimal time for cleaning and disinfecting the greenhouse. During this period, it is easier to remove all organic residues from the walls and frame, if you leave them until spring, they will petrify and it will be much more difficult to wipe them off. This is a direct analogy with dirty dishes, which are much easier to wash after eating than to soak dried food debris later.

Greenhouse preparation for disinfection

In order to carry out high-quality disinfection of the internal space, all unnecessary things need to be removed from the structure, if possible, leaving only bare walls. Before starting treatment, it is necessary to remove the garters, remove the nets, remove the trellises. If auxiliary systems are installed inside, it is advisable to disassemble them and take them out of the room.

How to disinfect a greenhouse in the fall

Before disinfection, the entire surface, as well as the frame, must be thoroughly washed. After washing, disinfection can be carried out. For processing, chemical and biological preparations are used.

Polycarbonate greenhouse disinfectants in autumn

There are quite a few ways to disinfect a polycarbonate greenhouse in the fall. Here are some of the compounds that can be used to sanitize:

  • copper sulfate;
  • sulfur checker;
  • potassium permanganate;
  • bleaching powder;
  • cuttings sulfur.

If the structure is old, badly neglected and has not been disinfected for a long time, then formalin is used to process it. This is a potent substance, but it will kill not only harmful, but also beneficial microorganisms.

Sulfur checker

An effective method to disinfect a greenhouse in the fall, simple and reliable, but absolutely not applicable for structures with a metal frame. In the process of fumigation, the checker emits sulfur dioxide, which, when interacting with water, turns into acid. The ingress of such drops on metal elements leads to very strong corrosion, which cannot be stopped.

To disinfect a polycarbonate greenhouse in the fall, it is sealed with tape, and sulfur checkers, the amount of which is calculated from the formula 100 g of active substance per 1 m3 of volume, are installed evenly on iron supports and set on fire. After making sure that the reaction has begun and the checker has begun to emit smoke, the doors are closed. The room should be in this state for 3 days, after which it is ventilated.

Important! It is advisable to moisten the walls and frame before fumigation with water for greater efficiency.

Cuttings sulfur

To fumigate with cuttings sulfur, you will need to mix it in equal proportions with charcoal and grind it. The mixture is poured onto metal trays and evenly distributed over the area. In total, it will be necessary to take 1 kg of sulfur for every 10 m3 of greenhouse volume.

The principle of operation is similar to that of a sulfur stick, therefore this method is also contraindicated in greenhouses on a metal frame. Ignited sulfur is left in a hermetically sealed greenhouse for 3-5 days, during which time not only the surface of the greenhouse will undergo disinfection, but also the soil in it. After that, the doors are opened. It is necessary to ventilate the structure for several weeks, all work in it for this time must be stopped.

Important! All work with sulfur compounds must be carried out using personal protective equipment.

Copper sulfate

Copper sulfate is an effective broad-spectrum fungicide. To prepare a solution for processing, you need to take 100 g of powder per 10 liters of water. Disinfection of the greenhouse in autumn with copper sulfate is carried out using a spray bottle, spray bottle or sprinkler of any type.

Bleaching powder

To treat the surface of the greenhouse with a bleach solution, you will need to dissolve 0.4 kg of the substance in 10 liters of water. After that, the mixture must be left for several hours to settle. Then carefully drain the solution from the sediment and use it to treat the interior. The sediment can be used to whitewash wooden structures. After processing, the greenhouse must be closed for a few days.

Potassium permanganate

Potassium permanganate is a well-known potassium permanganate. This drug is sold in pharmacies and is a fairly strong disinfectant. To disinfect greenhouses after harvesting in the fall, potassium permanganate is diluted to a bright pink color, after which the walls and frame are treated with a brush or spray bottle. In addition to disinfection, potassium permanganate also enriches the soil with microelements.

Repair and processing of the greenhouse frame

During operation, the frame suffers almost more than the covering material. The metal profile collapses and rusts, the wood rots and turns into dust under the influence of high temperature and humidity. In the fall, you should pay special attention to this. The metal profile must be cleaned of rust and painted. Wooden elements that have become unusable must be replaced.

The places of contact of the frame elements with polycarbonate sheets are the most contaminated, since many different harmful microflora are stuffed into such slots. Therefore, it is necessary to process such places especially carefully, not sparing the disinfectant solution.

How to wash a polycarbonate greenhouse in the fall

You can wash your polycarbonate greenhouse in the fall with warm water and laundry soap. You can also use liquid detergents, for example, for washing dishes, such as Shine, Fairy and others.

How to wash a polycarbonate greenhouse in autumn

The detergent dissolved in water is applied to the walls and frame elements in the form of foam with a large brush or foam sponge, and after 10 minutes it is washed off with clean water from a hose. Increased attention should be paid to the processing of joints, places of contact of polycarbonate with the frame, cracks and corners, since in these places the greatest accumulation of dirt is observed.

Important! It is undesirable to use high-pressure car washes for cleaning greenhouses, as they can damage the polycarbonate.

Processing of auxiliary elements

Everything that is in the greenhouse during the season (containers, dishes, implements, nets, trellises and others) is contaminated with pathogenic microflora no less than the soil or the walls of the greenhouse. Therefore, after the completion of all work in the greenhouse, these auxiliary elements must be put in order, washed and sanitized.

Plastic containers and nets must be cleaned, washed, disinfected with a solution of any fungicide (for example, copper sulfate) and dried. All the ropes that were stretched in the greenhouse, as well as the wooden pegs to which the plants were tied, must be burned. This is, in fact, a consumable and there is no point in disinfecting it. But you do not need to reuse them, since there are no less harmful bacteria on them than on the soil.


It is recommended to wash the polycarbonate greenhouse in the fall, as well as to disinfect it, even in cases where no diseases were noted in the cultivated plants during the season. This is a very effective preventive measure, which allows not only to get aesthetic pleasure from the look of shiny polycarbonate, but also to prevent the appearance of dangerous diseases that can significantly reduce or even destroy the entire crop. A clean greenhouse is a guarantee of the gardener's peace of mind.

Watch the video: Inside a Polycarbonate Greenhouse in a Storm