How to treat Tobacco Mosaic virus on tomatoes

One of the most common diseases of the tobacco mosaic virus on tomatoes destroys seeds, seedlings and bushes of plants. The disease is caused by a virus with the consonant name of Nicotine. Under favorable conditions, the infection spreads rapidly and can destroy the entire future crop.

Tobacco Mosaic Virus on Tomatoes

Seedlings that have not yet developed sufficiently strong defense mechanisms suffer most from tobacco mosaics. With growing seedlings, the gardener often conducts various agricultural activities, spreading the virus to seedlings of other crops.

General characteristics of the disease

Tobacco mosaic of tomatoes, the treatment of which is carried out with the manifestation of the first symptoms is familiar to every experienced gardener. In most cases, the virus appears in the greenhouse until the seedlings grow. High humidity creates all the necessary conditions for the rapid spread of the virus. Can suffer from the disease:

  • a tomato;
  • spinach;
  • cucumbers
  • cabbage.

Each virus carrier is a threat to neighboring crops. The infected plant quickly fades and changes the color of foliage, stems.

The root system is the last to suffer from the virus. Characteristic spots form on tomatoes, which should be combated with home-made (natural) or purchased products (substances with active bacteria that can protect the culture).

The root cause of the disease and the sources of the virus

Tobacco mosaic on healthy tomatoes occurs in greenhouse conditions or on an open land plot, if the gardener does not follow the rules for agricultural activities: old equipment, unfertilized soil, improper care of plants. The main reasons for the appearance of the virus on tomatoes:

  • too thick landing;
  • poor ventilation (on an open land plot drafts or insufficient air purge);
  • high humidity.

In a greenhouse or garden, improper temperature conditions or too high humidity will lead to infection of plants with the virus. Tobacco mosaic is determined by a number of symptoms that will become a hint for a novice gardener. If the virus wound up on the tomatoes, characteristic yellow dry spots appear on the green leaves and stems. The green part of the tomatoes becomes like a mosaic with dark and bright areas.

Sources of the disease are the remains of other plants, soil or infected seedlings. From crops, neighboring crops can become infected. Contact transmission of the virus is the most common and dangerous. Insects quickly spread the infection to all plants in the greenhouse or in the garden.

Symptoms of the disease

Over time, the virus completely destroys the foliage: the deformation of the border leads to the drying of the stems and leaves. With a running disease, growths in the form of solid lumps appear on the foliage.

Infection affects the condition of the fruit: tomatoes ripen for a long time and significantly decrease in size. Gradually, the disease passes to neighboring crops, and whole rows of planted tomatoes dry out.

Disease treatment

The disease needs to be treated as quickly as possible.

Tobacco mosaic of tomatoes can contribute to infection by other infections. Mixed diseases leads to a tomato shoot, which leads to weakening of the stems (bushes break and dry out).

The fight against the virus begins at the first appearance of yellowness on the foliage. For a good tomato crop, timely prevention and treatment of leaves, stems and fruits from a viral infection is necessary.

Tobacco Mosaic Treatment

Treatment of mosaic on tomatoes begins with the treatment of diseased crops.

For these purposes, a homemade solution is prepared: 100 g of micronutrient fertilizers are added per liter of whey. The prepared liquid carefully processed leaves on tomatoes (it is necessary to go through each leaf) and stems. For better processing use a conventional spray gun.

Treatment of plants for a viral disease is not limited only to the treatment of the bush, but also to the cleaning of the soil. Soil that is infected with the virus is not suitable for further planting seedlings. The upper soil layers are removed completely (up to 15 cm). The new embankment is washed with a concentrated solution of potassium permanganate (proportion with water 1: 1) and dried. Renewed soil is fertilized with nitrogen-containing substances and whey.


Prevention of tobacco mosaic of tomato will help to avoid long-term treatment of the crop and prevent the destruction of the crop. Preventive work includes treating an already healthy bush, seedlings and preparing seeds that are planted in fertilized soil.

Tomato viral infection spreads rapidly in greenhouses and in a humid environment. Constant ventilation of the covered premises and removal of moisture accumulated on the walls will eliminate the threat of the virus. The soil for planting seeds and finished seedlings is treated with a weak solution of potassium permanganate. Before planting, the soil is frozen and moistened.

Seed treatment

Tobacco mosaic threatens seeds that may be carriers of the infection for several weeks. To enhance the protection of seeds, prophylaxis is carried out before planting seedlings in a greenhouse. Before sowing, all seeds are soaked in a potassium permanganate solution (1% solution) or about 2 hours in the Fitosporin preparation. After processing, the seeds are planted in moist soil.

Seedlings with the first signs of the disease are removed from the greenhouse and burned. After processing the soil, all equipment is washed and disinfected. Boxes and pots for seedlings are processed 4 days in a row. For these purposes, a 5% solution of potassium manganese is used.

Disease Prevention in Open Land

General disease prevention will protect adult bushes until harvest. Planted seedlings need to be vaccinated against the virus (vaccinate), 20% hydrochloric acid is used to disinfect seeds, seedlings and stems of bushes.

The upper soil layers in the open area are fertilized with mineral complexes that help get rid of pests (virus carriers). The beds between the bushes well weed at least once a week, so that other plants do not cause the destruction of the future crop.


Infection infection occurs due to a number of factors that can be avoided. The virus spreads in poorly cleaned greenhouses, where humidity and temperature conditions are not observed. Virus resistant seeds treated prior to planting.

Tomatoes are protected from insects, and in the rainy season the bushes should be more fertilized and watering reduced. Tobacco mosaic in homemade tomatoes is well treated immediately after infection, but is rapidly spreading. Comprehensive measures will protect the culture from a common disease.


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