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Details about late blight disease for vegetables: what it is and how to treat it

Details about late blight disease for vegetables: what it is and how to treat it



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Phytophthora - all gardeners are afraid of this word. The disease leads to the destruction of tons of crops every year.

It affects not only private gardens, but also professional lands.

To deal with the enemy, you need to know how to do it. Let's see which methods are the most effective.

What is late blight

Late blight (late blight) is a disease dangerous to plant health. This is a fungal disease, the signs of which are brown spots on top of the leaves of crops and white bloom on the bottom.

Phytophthora may appear due to the following reasons:

  • the plant does not have enough air;
  • condensation often forms;
  • the temperature regime is violated;
  • the norms of light intake are violated;
  • the plants are planted too close to each other;
  • the soil contains too much nitrogen and lime;
  • lack of potassium, iodine, manganese or copper.

The infection develops rapidly and literally devours the culture before our eyes. Small, at first, spots, after a few weeks, capture more and more healthy tissue. As a result, the plant begins to rot and dry out. Late blight appears mainly in the second half of summer, with high humidity and low temperatures (12-25 degrees).

What vegetables are most often affected by the disease

Most often, late blight attacks nightshade crop species, such as:

  • potatoes;
  • eggplant;
  • tomato;
  • tobacco;
  • vegetable pepper.

Buckwheat, some types of berries, castor oil plants, citrus fruits and others are also susceptible to the disease.

Treatment for late blight

Treatment for late blight and preventive measures depend on the type of culture in which the first signs of the disease appeared. But there are general rules and methods of struggle.

Folk methods

Opponents of the use of chemicals in the garden can use folk methods, they are harmless to humans and animals, but require a little more time:

  • Salt. The saline solution covers the ground with a thin protective layer that prevents the penetration of fungus.
  • Whey or kefir. The method uses the ability of lactic bacteria to inhibit the growth of fungus.
  • Hay. Hay stick can block the development of late blight.
  • Copper wire. Copper has a detrimental effect on the development of the fungus.
  • Boiling water. The most affordable and cheapest way.
  • Potassium permanganate solution.
  • Potassium chloride solution 1%.
  • Copper sulfate.
  • Yeast. 100 grams of yeast is diluted in 10 liters of hot water, infused for several days and sprayed on the affected bushes.
  • Vinegar. Dilute half a glass of essence 9% in 10 liters of water. Spray the aerial part of the plants.
  • Garlic tincture. Chop the garlic arrows in a blender or meat grinder. Pour raw materials with a bucket of water and leave for 24 hours. Spray the plant with a solution every two weeks.

Store funds

Today, there are drugs that are not only able to effectively cope with the disease, but also be environmentally friendly and safe for humans. One of these tools is "Profit Gold".

The drug has a huge range of effects, shows excellent results in the fight against late blight and other types of fungus and rot.

The product is sold in the form of granules, which are diluted with water according to the instructions: for tomatoes and potatoes - 1.5 g per 2.5 liters of water. the finished mixture must be poured into a spray bottle and applied to the plants.

Other effective store drugs include:

  • "Hom";
  • "Topaz";
  • "Quadris";
  • "Copper sulfate";
  • Fitosporin.

Pharmacy preparations:

  • "Trichopolus". An agent for combating microbes.
  • "Furacilin". It is used to treat fungal diseases and simultaneously destroys phytophthora.
  • "Boric acid". Intolerable to most fungal diseases.


Watch the video: What To Do if You Find Late Blight in Your Garden (August 2022).