2 Review (s)

  1. Tatyana Fedorovna NIKULINA

    Tell me what misfortune befell my carrot last season. Her shoots were pale green, and then generally dried out.
    What causes this and what needs to be done to prevent this from happening again in subsequent years?

    Reply
    • OOO "Sad"

      Apparently, the young plants fell ill with brown leaf spot. The causative agent of this disease affects the above-ground parts of carrots: stalks, leaves and stems at all stages of its growth.
      Symptoms
      On seedlings, the disease manifests itself in the form of a “black leg”. Severely affected seedlings turn yellow and die.
      On the leaves and stems, the ailment leads to the appearance of numerous yellow, and then dark brown spots of an indefinite shape. Most often, the tips of the leaves suffer, which curl, turn brown and die. With severe damage, the plate of the sheet completely dries. In wet weather, a velvety dark coating appears on the infected tissues - sporulation of the fungus. Usually, the disease manifests itself in mid-July, it affects plants especially intensely from late August to mid-September. Carrots are most susceptible to the causative agent of brown leaf blotch in the 8th phase of root growth. At this time, the fungus develops intensively in the tissues of the host plant.
      Note
      Sources of infection are plant debris, infected roots and seeds. The harmfulness of the disease is high, yield losses can be 30-60%.

      Control measures
      Agrotechnical measures are most effective in combating this disease. First of all it is necessary to observe the alternation of cultures at the site. The next spring, take a plot of carrots where, in the past season, greens, cabbage, zucchini, early potatoes, cucumbers, squash, spice-like herbs or pumpkins grew. If you use ordinary seeds that have not undergone any treatment, warm them with 8 warm water (45-50 degrees) for 30 minutes or process in a pink solution of potassium permanganate.
      When the first seedlings appear regularly during the growth, watering the plants with nettle broth (500 g fresh or 100 g dry on 5 l water), horsetail (1 kg fresh or 150 g dry on 10 l water) or celandine infusion (4 kg flowering plants soaked in 10 l of water). It is also necessary to regularly loosen the aisles.
      Chemical protection can also be used. To do this, when the first signs of disease appear (in the seedling phase) and subsequently every 10-12 days, the plants are sprayed with “Modified Azophos” or “Quadrix”. The preparations are used according to the recommendations indicated on the package.

      Reply

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