The use of iodine in the fight against late blight of tomatoes. How to properly process tomatoes?

Tomatoes are grown in open and closed ground at their summer cottage. This crop is very popular among Russian gardeners, as many want to enjoy fresh, natural tomatoes. During rainy periods, this plant is often affected by late blight. Instead of dangerous chemicals, ordinary iodine from a pharmacy will help in the fight against the disease.

About the drug

Means for combating late blight on tomatoes are prepared from a 5% iodine solution . It looks like a red-brown liquid with a characteristic odor. The product is used for external use and is sold in 10 ml dark glass bottles.


Prices for the solution vary, depending on the manufacturing company and the policy of the pharmacy chain. On average, it can be purchased for 9-55 rubles.

The product has the following effects:

  • antiseptic;
  • antimicrobial;
  • annoying;
  • bactericidal.

Iodine is used to treat the skin for inflammatory and infectious lesions, wounds and cuts. often taken orally to prevent atherosclerosis .

When to start using?

It is important to start treating tomatoes as quickly as possible, then you will be able to get rid of the disease in a short time without losing the plant.

Iodine-based products should be used after detecting signs of late blight. These include:

  • elongated dark brown spots and stripes on the shoots and petioles of bushes;
  • grayish-brown spots on the foliage;
  • brownish-white hard spots on fruit;
  • the flowers turn black and gradually dry out.

The disease begins to spread throughout the tomatoes from the lower tiers of foliage, rising higher and higher. During dry periods, the affected parts of the bushes dry out, and during wet periods they rot.

Late blight

Late blight is an unwelcome guest in summer cottages and garden plots. This disease in the shortest possible time can negate all our efforts to care for seedlings and plants in the open ground or in a greenhouse. The result of the development of this disease is a lack of harvest for the table and for the winter and our grief about this.

Late blight is very insidious. The causative agent of late blight is the late blight fungus, and most often it affects plants of the nightshade family - tomatoes, eggplants and especially potatoes. Signs of the disease are dark spots on the stems and leaves of diseased plants, which turn black over time. The fruits of affected plants become unsuitable for food.

The first victims of late blight are weakened and underdeveloped plants, and then the infection spreads throughout the entire area, therefore, in order to increase the resistance of crops to this fungal disease, it is necessary to begin preventive measures during the seedling period.

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I would like to offer you a recipe for an effective remedy that increases the resistance of plants to late blight and other diseases.

How to process it correctly?


Processing rules:

  1. Choose a dry and calm day.
  2. Remove all affected leaves, remove bushes that can no longer be saved, and burn.
  3. In the morning or evening, prepare the solution and start spraying the plantings.
  4. Repeat the procedure after another 4 days.
  5. For preventive purposes, spraying can be done once every 2-3 weeks.

Spraying technology and features

When foliar feeding tomatoes with iodine solution, standard sprayers are usually used. Each bush should be evenly moistened with the working solution. As a last resort, if you don’t have a sprayer, you can use an ordinary broom and bucket. A broom is moistened in a bucket and the iodine solution is shaken onto the bushes with tomatoes.

In the greenhouse

Since it doesn’t rain in a greenhouse, even when spraying, the entire nutrient iodine solution will be completely absorbed by the tomato leaves.

Therefore, the frequency of foliar feeding of tomatoes with iodine in a greenhouse can be halved. In addition, due to the lack of rain, the soil in the greenhouse is not thoroughly washed, and a higher concentration of active substances accumulates in it. This raises the risk of overdose.

Sometimes in greenhouses they use a different technology for feeding tomato bushes with iodine. To do this, vials with iodine are hung vertically on supports above the bushes, but without lids. The iodine evaporates and its vapors from the air are absorbed by the tomatoes. In this way, additional disinfection of the greenhouse premises also occurs.

In the open ground

It is better to spray in the morning or evening, when the plants are not in danger of being burned by sunlight on wet leaves. The jet pressure when spraying should not be too strong. It is especially effective to create an atmosphere of fog.

If it rains within 12 hours after the procedure, it is better to repeat foliar feeding. Because all the beneficial substances may not have time to be absorbed by the leaves and will be washed away.

With wood ash

To prepare this product, mix:

  • water – 10 l;
  • wood ash – 250 g;
  • iodine – 10 drops.

Before treatment, plants are watered abundantly with warm, settled water. This must be done so that the active solution, absorbed into the soil, does not burn the roots of the tomatoes.

The prepared “medicine” is watered on the ground in the circle of bushes around the trunk. I use about 0.5 liters of product per plant. Iodine will disinfect the soil and destroy fungal spores, and the ash will nourish the crop with useful microelements, strengthen the immune system and increase resistance to disease.

Benefits of iodine

For the growth and development of tomatoes, a number of chemical elements are needed, one of the most important is iodine. The microelement has many irreplaceable effects:

  • stimulation of germination and germination;
  • increasing the tolerance of tomatoes to pathogens;
  • neutralization and disinfection;
  • preventive protection against pathogens;
  • improving the survival rate of seedlings;
  • improvement of bushes;
  • increased productivity.

For many diseases, treating tomatoes with iodine and milk is an effective, safe procedure.

For cladosporiosis of tomatoes, whey and iodine are the right solution. To do this, prepare 1 liter of whey, into which 10 drops of iodine are added. The resulting mixture stops pathogens.

With dairy products

Milk and dairy products contain large amounts of microelements that plants need for healthy growth and fruit formation. Drinks create an impermeable film on the surface of leaves and shoots, so the fungi die due to lack of oxygen. And lactic acid bacteria speed up the process by infecting spores.


Use one of the solution preparation options:

  1. Combine a liter of whey with 40 drops of iodine, add 15 ml of 3% hydrogen peroxide and dilute in a bucket of water.
  2. Pour a liter of skim milk and 20 drops of iodine into 10 liters of water, then mix thoroughly.
  3. Add half a liter of kefir, yogurt or sour milk to a bucket of water along with 10 drops of iodine.

Thoroughly spray the plantings with one of the solutions so that the composition gets on all parts of the plants. The procedure can be performed once every 10-14 days.

It is better to use natural farm products. They will show higher efficiency than store-bought milk.

Spraying tomatoes with a solution of milk: which milk to choose

To prepare the solution, ordinary fresh milk is used, since it contains the maximum amount of nutrients. Milk can be pasteurized or processed. Only it will contain slightly less nutrients.

To spray tomatoes with milk, you can also use whey. It is also rich in essential substances. Whey is the material that remains after fresh milk has soured. It is worth noting that when using it, it will need to be diluted with water so that the soil does not lose its balance of acidity and alkalinity.

Note: Whey is produced when milk is placed near heat. This way it will sour faster and the whey will separate.

This serum displaces fungal diseases from tomatoes due to the fact that it contains many bacteria.

Greenhouse treatment

Many gardeners think about the likelihood of late blight in advance and, for the sake of prevention, treat greenhouses with iodine solution. The same product can be used to spray a greenhouse if the disease does appear.

Mode of application:

  1. 60 drops of iodine are diluted in 20 liters of water.
  2. Half of the solution is sprayed on the walls of the greenhouse, and the soil is treated with the remaining volume.
  3. One procedure is enough, but if the damage is severe, you can repeat it 2-3 more times with an interval of 2 weeks.

Agronomists recommend washing the walls of the greenhouse with a pale pink solution of potassium permanganate before treating with iodine.

The use of iodine for the prevention of tomato diseases

It should be noted that there is no need to feed tomatoes with iodine, since their need for these microelements is very small. If only in a separate region where peat and podzolic soils are located. On such soils, iodine deficiency is detected, and this land treatment will be in demand.

As for preventive measures to prevent late blight in tomatoes, here you can use a solution made according to a standard recipe.

The composition of the recipe is as follows: dilute 1 liter in ten liters of water. sour milk and 1 spoon of hydrogen peroxide, then add 40 drops of iodine, mix everything and spray in the evening for several days.

Advantages and disadvantages


Like any product, iodine-based solutions to combat late blight have their advantages and disadvantages.

Advantages:

  • safe for humans, the environment and pets;
  • when used correctly, it gives decent results;
  • low cost;
  • easy to prepare;
  • does not contain hazardous chemicals.

Flaws:

  • less effective than commercial fungicides;
  • may harm people with hypersensitivity to its components.

Why treat tomatoes with a mixture of milk, iodine and water?

Tomatoes are a demanding crop to care for throughout their growth. Treating tomatoes with a mixture of milk and iodine is considered an effective, and most importantly not harmful, method.

Advantages of processing tomatoes with a mixture of iodine, milk and water:

  • it is harmless to humans;
  • has a positive effect on the growth and development of plants;
  • has an environmentally friendly composition;
  • consists of accessible components;
  • accelerates the ripening of the crop.

What does it help with?

Treating tomatoes with a solution of milk, iodine and water is a popular way to combat diseases and pests .

What is a mixture of milk and iodine used against?:

  • infections – fungal, viral, bacterial;
  • non-communicable diseases associated with improper care and planting;
  • pests

The most common disease of tomatoes is late blight. The pathogenic fungus slows down plant growth and affects the crop. For late blight, a method is used to disinfect plants and the surrounding area. It is a mixture of milk and iodine that will cope with this task perfectly.

Important! If a disease is detected, treatment is carried out every day.

The positive effect is associated with increased acidity of the solution . The pathogenic fungus does not survive in such an environment and dies.

A solution of milk and iodine repels ground insect pests : aphids, whiteflies, mites, weevils. Due to its structure, the solution containing milk envelops the plant, creates a protective film and prevents insects from damaging the crop.

Principle of operation and benefits of components

The prepared mixture is an alternative to chemicals . Each component individually is beneficial for the culture.

The effect of milk on tomatoes:

  • due to the content of amino acids, it improves plant growth;
  • macro- and microelements are necessary for development;
  • lactose inhibits the growth and development of fungal microorganisms and improves metabolic processes.

The maximum effect is obtained from the use of fresh milk. Store-bought milk with a long shelf life will not have the desired effect .

The use of iodine begins from the earliest phases of development .

Benefits of iodine for tomatoes:

  • stimulates the growth and development of plants;
  • has disinfecting properties;
  • increases productivity;
  • improves seedling viability;
  • increases resistance to diseases and pests.

In addition, the use of iodine improves the nutritional composition of the soil .

Precautionary measures

Iodine belongs to hazard class 2, it is toxic and flammable, but can only cause harm in higher concentrations than the solution available in pharmacies.

However, it is worth understanding that the product has an irritating effect:

  • on the respiratory tract;
  • eyes;
  • mucous membranes;
  • skin (burns and causes dermatitis).

For protection when preparing and using iodine-based mixtures, it is enough to use gauze bandages and rubber gloves.

For prevention


Gardeners often use the compositions discussed above for preventive purposes. They increase the resistance of tomatoes to various diseases, repel pests and nourish the sprouts with useful substances.

Treatment is carried out once every 3 weeks or only after planting; the soil and greenhouse are treated before placing the crop.

Reviews from gardeners

  • Sergey Ivanovich, Lipetsk . Homemade products have a significant drawback - they are ineffective and require a large number of treatments. Therefore, I use iodine solutions only for preventive purposes and they do their job perfectly. But I think that if late blight has already taken hold, tomatoes can only be saved by chemical means.
  • Anna, Ekaterinburg . She used iodine in the treatment of late blight and achieved success in this matter. At the same time, she noted that the fruits ripened earlier than expected. Now once a month they add art. a spoonful of iodine in a bucket of water and use this solution to water the tomatoes at the root.
  • Ivan, Omsk . I use a solution of iodine and ash as a preventative and fertilizing agent. But it did not help me in the fight against late blight; the disease receded only after treatment with a fungicide.

August – fight against late blight

Late blight is the scourge of vegetable gardens and greenhouses. Tomatoes especially suffer from it in August, when the difference between day and night temperatures becomes noticeable. Temperature fluctuations weaken plant immunity and a pathogenic fungus that lives in the soil affects tomato bushes.

Not only leaves and stems suffer from late blight; the main damage occurs to the fruits. It would seem that tomatoes that were healthy at the time of harvest become covered with brown spots during storage. They are no longer suitable for use. In July, outbreaks of late blight are also not uncommon, especially during periods of prolonged rain. Most gardeners prefer to restore the immunity of fruit-bearing plants using folk methods. Milk is included in some of them.

The use of whey for feeding tomatoes in the period from July to August is of great benefit in the fight against late blight.

Recipe with whey

The whey is sold in liter bags in supermarkets. Already in July, in order to prevent late blight, you can spray tomato bushes daily with serum diluted 50 to 50 with water.

Important! Apply daily treatment of tomatoes with serum in the morning or evening before sunset.

For tomatoes, fertilizing with whey serves as protection against harmful fungi and kills its beneficial lactic bacteria. The bushes are protected by a film that forms when the leaves are sprayed with a solution.

Iodine plus milk

During an outbreak, experienced gardeners treat the bushes with a solution of water, milk and iodine. For 1 liter of water you need ½ glass of milk and 2-3 drops of iodine. You should not increase the dose of iodine, as you can burn the leaves. During an outbreak of late blight on tomatoes, the picked fruits are disinfected by placing them for 30 minutes in warm 35°C water with manganese diluted in it.

Feeding tomatoes with milk against late blight is alternated with treatments with garlic infusion. The recipe is simple:

  1. Take 100 g of peeled garlic cloves and stems.
  2. Pour the resulting thick mixture with water (1 cup).
  3. Leave for at least 24 hours.
  4. Dilute the resulting concentrate with 10 liters of water immediately before use.

Prepare an infusion according to this recipe once every 2 weeks. Bushes are treated when the street is dry and there is no wind.

Kefir against late blight

There may be no milk or whey in the refrigerator. If there is kefir there, then it is very good. Pathogenic fungi can also be fought with lactic acid products diluted with water. One liter bottle needs to be diluted in 5 liters of settled tap water. The seedlings transplanted into the ground are treated for the first time.

10 days should pass from the moment of planting. All subsequent treatments are carried out at weekly intervals. The solution can be prepared directly in the sprayer by first pouring kefir into it and then water. For these purposes, it is a good idea to purchase a backpack-type sprayer; it is easier for them to process a large number of tomato bushes.

And more about the drug

Iodine is used not only to protect plants from diseases, but also to treat them. This drug often acts as a top dressing for adult bushes and seedlings. Lack of iodine leads to rotting of the ovaries and delayed fruiting.

But fertilizing with this product must be done strictly according to the rules.:

  1. It is prohibited to use perennial plants during the dormant period.
  2. Take no more than 1-2 drops of the drug per 2 liters of water, otherwise it can destroy beneficial bacteria in the soil and burn the roots.
  3. Seedlings and young shoots are watered with iodine-based solutions only after they have taken root in a new place after transplantation.
  4. The liquid should not get on the root collar of the bushes.
  5. Before fertilizing, the bed is watered generously with warm water.
  6. Wood ash will allow you to increase the efficiency of the fertilizer; it is added to an aqueous solution of iodine in a ratio of 1:10.
  7. When foliar feeding, it is recommended to spray the product through a fine spray bottle. Then the plants will absorb up to 65-90% of the nutrients.

Who would have thought that an effective remedy for late blight could be found in a regular home medicine cabinet. Iodine will not only protect the plantings from this unpleasant disease, but will also nourish the tomatoes with useful microelements and increase their immunity.

Spraying tomatoes with milk with iodine: what are the benefits of iodine

Spraying tomatoes with milk is just as effective if iodine is added to the solution. Iodine has many beneficial properties. For example, it helps tomatoes develop properly. Also, with a normal amount of iodine in the plant, it develops and grows faster. With a lack of iodine, growth slows down 2-3 times. Iodine also has the following properties:

  • The number of seeds that will sprout and develop properly increases.
  • Acts as a disinfectant, destroying all fungal and pathogenic organisms.
  • Thanks to iodine, the immune system of tomatoes increases. Consequently, the tomato becomes more resistant to many diseases and pests.
  • When used, it does not negatively affect humans, plants and animals, as it is a safe substance.
  • Iodine is absorbed through the root system into the fruits and makes them more useful, and also increases their shelf life.
  • Thanks to iodine, the plant takes root well after transplantation.
  • Since tomatoes need iodine during the formation period, it helps to survive this period without stress.

Spraying tomatoes with milk and iodine: photo of the process

Note: Excessive amounts of iodine provoke diseases, so a normal amount should be added. Also, you cannot use iodine immediately after transplanting, as the plant will react poorly to it. If you add iodine, then only after a while, when the tomato takes root and adapts.

Before replanting, the ground can be slightly treated with this substance. The soil will become safe for planting. But such treatment must be carried out 4-5 days before the transplant is carried out.

Note: For planting seedlings, a 0.05% iodine solution is used to treat the seeds, so they will develop better and sprouts will appear soon.

Before using iodine as a treatment, the soil should be thoroughly watered with warm water. This way the soil will better absorb iodine. Under no circumstances should iodine be added to dry soil.

If you want to disinfect the soil a little, then you need to use 2 drops of the substance per 5 liters of warm water. Such watering can be carried out within 10 days after the transplant has taken place.

How to spray?

Spraying tomatoes with milk should be carried out according to certain rules and within a certain time period.

  • Spraying tomatoes with milk should be done in the morning or evening.
  • The plant should not be exposed to sunlight for 5 hours after treatment.
  • There should be no wind during processing.
  • The air temperature should be about +20 degrees.

Note: There should be no direct sunlight, otherwise the plant may suffer severe burns.

To spray tomatoes with milk, you must use a special spray bottle with very small holes that will turn the water into water dust.

When to treat?

The treatment can be carried out as a small fertilizer or as a preventive maintenance.

The first spraying should be carried out 15 days after the seedlings have been planted in open or closed ground. After which this treatment is repeated every 15-20 days.

If the gardener notices that the plant is affected by late blight or other diseases. Processing must be done every day.

It is best to start processing in mid-summer, or rather in the first half of July. Since at this time tomatoes need all the beneficial microelements contained in milk.

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