How to treat soil from late blight in spring: advice for those who hoped for frost

It is not possible to count on frosts to destroy pathogens causing infectious and fungal diseases.

According to the rules, the treatment against late blight should be carried out in the fall, but this requires time, which is already in short supply. The worst thing is if the gardener relies on frosts in this regard.

The causative agent of late blight quite steadfastly tolerates a drop in temperature to 15 degrees below zero. That is why it is necessary to disinfect the greenhouse in the spring. But even in open ground, no more than 30% of pathogenic organisms die before spring, provided that the soil freezes to a depth of 15 cm.

Before starting the treatment, you need to get rid of the remains of last year's vegetation. Next, you need to choose a means to strike. These can be fungicides, biopreparations, green manures and even folk remedies (not always effective).

Chemicals

1. In early spring, as well as in autumn after harvesting, there is no need to be afraid of chemicals. In this regard, copper sulfate is the leader (50 g per 5 liters of water, consumption per 1 sq. m). If only prevention is required, the solution can be diluted with another 5 liters of water.

2. Colloidal sulfur is also used - 10 liters of water per 30 grams of powder, consumption per 100 sq. m at a soil temperature of 15 degrees Celsius.

3. "Oxychom" is also effective, but dangerous to health. It is used strictly according to the instructions. Fungicides "Profit Gold", "Kuproksat", "Ordan" are also used.

The duration of action of the preparations is up to 3 weeks, but all of them are toxic to animals and humans. Therefore, it is better to use biological preparations in spring.

Biopreparations

This could be "Alirin-B", "Agat-25K", "Trichodermin", "Fitosporin". They not only destroy the pathogen, but also fertilize the soil, and are completely safe.

Green manure

To combat late blight, white or yellow mustard, rapeseed or radish are sown, but most often a mixture of these crops is sown.

• Related news:
• diseases
• processing
• soil
• board
• country house
• 5 January 2023

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