Causes and treatment of gray rot on tomatoes

Tomatoes are grown in almost all summer cottages and garden plots. Summer residents often encounter cultural diseases, gray rot of tomatoes is one of them. Another name is fomoz.


Symptoms characteristic of the disease, its spread

The disease primarily affects the stems. More often the plant is affected during the fruiting period. Gray spots appear that are noticeable on the leaves of tomatoes and their stems. After a week they become covered with a gray coating.

The disease spreads very quickly. Favorable conditions for its development are wet weather.In 3-5 days, the spot grows along the entire perimeter of the stem. In the first week, the fungus does not form spores. The development of necrosis of the cortex and blood vessels occurs inside the stem.

The leaves located above the spot begin to turn yellow, and the stem begins to form aerial roots due to lack of moisture. Then the whole plant withers and disappears.

It is easier to prevent any disease than to cure it later. In addition, one diseased plant can infect all neighboring ones. And this, in turn, is fraught with the loss of a large amount of harvest.

rot on tomatoes

Causes

The development of the disease begins not only from the transfer of spores by wind. The cause of rot on tomatoes is incorrect agricultural technology:

  • Using untreated seeds. Sometimes these are seeds collected independently.
  • Contaminated, untreated soil.
  • Lack or excess of moisture.
  • Insufficient ventilation during greenhouse cultivation.

begin to turn yellow

By following the techniques and rules of planting and growing, it is ensured that the plants practically do not get sick.

Types of rot

In order to begin effective treatment, you must correctly determine the type of rot that has affected the plants. There are several types of rot:

raw seeds

  • Gray rot. Its external signs are immediately noticeable: spots appear on the stems, which are then covered with a gray coating. Plants quickly dry out and disappear, infecting all neighboring bushes.
  • White rot. Source of disease development, soil or compost. Parts of the plant that have mechanical damage are affected first. It is recommended to steam the soil in greenhouses.
  • Root rot. Plants in greenhouses are affected. The disease develops throughout the entire period of plant growth. A distinctive feature is that the root collar and the tomato root itself turn black.
  • Brown rot. The infection affects areas near the stalks.Small spots form on the fruits, however, everything inside rots. The source of the spread of the disease is fertilizing the soil with fresh manure.
  • Apex rot. It spreads very quickly. Symptoms of its development, the appearance of spots on fruits. Rot spreads on tomatoes in a greenhouse, and in a short period of time destroys the entire crop.

All types of rot mainly affect plants in the greenhouse. Therefore, it is recommended to ventilate greenhouses well and water in moderation and on time. Starting in the fall, cultivate the land in greenhouses.

types of rot

How to treat the disease?

The diseased plant should be treated with one of the modern drugs for combating gray mold. These include:

  • "Topsin M".
  • "Bayleton."
  • "Euparen Multi" 1.5-3 kg per ha.
  • Use of sodium humate.

root rot

Tomatoes need to be processed several times a season. Timely preventive methods will help protect plants from infection.

Breeders have not developed a variety that is resistant to rot. Therefore, summer residents try to pay more attention to prevention:

  1. The treatment is carried out in May, all damaged plants are subjected to it. Repeated treatment after 14 days.
  2. In July, only those tomatoes that the summer resident suspects of not meeting the norm are partially processed.
  3. In August. Continuous treatment is carried out, be sure to repeat after 14 days.

areas affected

To consolidate the result, it is treated with a growth stimulator.

The affected areas are treated with a special paste. They do it themselves by combining:

  • 10 liters of water.
  • 300-350 g of CMC glue.
  • 30-40 g of fungicide.

rot resistant

By adding chalk, it becomes a paste. Coat the damaged areas, capturing 2-3 cm of a healthy stem. The likelihood of new spots appearing after 2 weeks. It is recommended to re-inspect the infected tomato.

Trichodermin suspension is used as a preventive measure. It is used for processing sections after removing stepsons and leaves. When carrying out mass pruning, it is recommended to use spraying. The best time to carry out the disinfection procedure is a clear day, the bushes should dry.

growth stimulant

Preventive measures

It is very difficult to cure rot on tomatoes, so measures are taken to prevent its occurrence:

  • Comply with agrotechnical requirements for cultivation.
  • Properly feed the plants using a combination of fertilizers.
  • Planting material is hardened and disinfected.
  • Treat soil and substrates.
  • Planted at the optimal distance.
  • Comply with the required humidity, lighting and temperature indicators.
  • Growth stimulants are used.
  • Set up drip irrigation.
  • Mulch the beds.

agrotechnical requirements

For the effectiveness of the measures taken, their timely application is important. Being late greatly reduces their effectiveness.

When the first signs of the disease appear, you should ventilate the greenhouse more often. Thereby reducing the level of air humidity.

The virus spreads by air. Plants that have wounds caused during harvesting or other events are especially susceptible to its influence. When pinching, the tool must be sharp; the procedure is carried out in dry weather. All plant residues are immediately removed.

their timely use

Gray rot on tomatoes is sometimes mistaken by gardeners for didimella or fusarium. Therefore, countermeasures are postponed, and the consequences are much more difficult to correct later. Treating stains with a special fungicidal ointment can protect plants from further development of the disease.

Any protective solution will perform better at the initial stage.To do this, tomatoes are examined for symptoms every few days. Timely identification of the type of rot will save the bush itself and other crops on the site from death.

gray mold

Plants that help neutralize infection

In addition to treating the greenhouse in winter, the beds are planted with the following plants:

  • Mustard.
  • Calendula.
  • Marigolds.

neutralize the infection

The peculiarity is that they secrete substances that prevent the disease from spreading further.

Folk remedies

Some summer residents categorically do not accept the use of chemicals on the site; for this they are looking for methods of control based on natural products:

  1. Soap is mixed with copper and the bushes are sprayed.
  2. 5 g of copper sulfate is diluted in 10 liters of water.
  3. 80 g of baking soda are dissolved in 10 liters of water.
  4. A 1% boric acid solution is used to spray bushes.

soap mixed

Each summer resident has the right to choose how to treat damaged tomatoes. An effective way has been found over the years.

An important condition for carrying out any treatment against gray rot on tomatoes is the use of several methods in combination. This is the only way to achieve maximum results. The main advice of the article is that it is better to prevent a disease than to treat it later.

damaged tomatoes

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