Bacillus velezensis strain TF3/BBR1

The active ingredient based on Bacillus velezensis strain TF3/BBR1 is a highly effective biological agent with significant fungicidal and bactericidal activity. This microorganism actively colonizes the rhizosphere and the surfaces of aerial plant organs, establishing a robust protective barrier against pathogens.

A key element of its mechanism is the secretion of a wide range of antibiotic compounds, including surfactins, iturins, and fengycins. These metabolites disrupt the cell membranes of pathogens, suppressing their growth and spore germination before they can infect plant tissues.

The strain acts as a strong antagonist by competing for essential nutrients and space, effectively displacing phytopathogens from their ecological niche. Through rapid multiplication, the bacteria form dense biofilms that prevent the development of fungal colonies on the plant surface.

Furthermore, this strain induces systemic acquired resistance in crops. The presence of bacterial colonies triggers the plant's immune response, stimulating the production of specific proteins and enzymes that make the plant less susceptible to attacks by harmful organisms.

This strain also facilitates the synthesis of phytohormones, which positively influences the plant's physiological state. Improved root nutrition and metabolic stimulation allow the crop to recover faster from stress or damage caused by previous infections.

Products based on this group are used to combat a wide spectrum of pathogens. The primary focus is on suppressing root and basal rot agents, such as Fusarium, Rhizoctonia, and Helminthosporium, which cause significant damage during the early stages of plant development.

The strain has proven effectiveness against foliar infections as well. It actively suppresses the development of powdery mildew, various types of leaf spots, rusts, and gray mold, making it a versatile tool for integrated biological crop protection systems.

The preparation successfully combats bacterial infections in crops, including vascular bacteriosis. The biological activity of the bacteria allows for effective control of the population dynamics of harmful microorganisms across different soil and climatic conditions.

The application spectrum includes vegetable crops in greenhouses and open fields, cereal crops, fruit orchards, and vineyards. High adaptability of the strain allows it to be used both for seed treatment and for spraying actively growing plants.

The use of this biofungicide is justified in organic farming, as it does not accumulate in fruits or soil. This allows for the production of food that meets strict ecological standards without the risk of exceeding chemical residue limits.

Application must strictly follow the guidelines specified in the commercial product label. Generally, seed treatment is conducted to create an initial defense against soil-borne infections, ensuring healthy and uniform emergence of seedlings.

For growing crops, the frequency of application is determined by the phytosanitary situation in the field. Standard protocols involve starting treatments at the first signs of disease or during periods of high infection risk, which typically coincide with active growth phases.

Optimal conditions for effectiveness require moisture, which is necessary for the bacteria to remain active. It is important to avoid spraying during intense solar radiation, as direct UV exposure can reduce the titer of the active bacterial cells.

Spray volumes should ensure thorough and uniform coverage of the entire plant surface. When treating soil or root zones, the application method must ensure maximum contact between the bacterial suspension and the plant's rhizosphere.

Intervals between repeat applications typically range from 7 to 14 days, depending on the severity of the infection. Combining the product with other biopesticides is acceptable, provided that the physical and chemical compatibility of the mixture is verified.

The main limitation is the incompatibility with harsh chemical bactericides, which can completely neutralize the action of the live culture. Similarly, mixing with broad-spectrum fungicides that possess bactericidal activity is not recommended.

Temperature plays a crucial role in the product's effectiveness. Excessively low or high soil and air temperatures can slow down colonization processes, potentially requiring adjustments to the timing of protective measures.

Storage of the preparation requires compliance with conditions that ensure the survival of the bacteria. Avoid prolonged exposure to high temperatures and direct sunlight on the containers holding the working solution.

Although the product is considered safe, standard safety measures should be followed when handling large volumes. Personal protective equipment is recommended to prevent contact with mucous membranes, especially when preparing concentrated mixtures.

It is necessary to monitor the pH of the water used for spraying, as extreme values can negatively affect the viability of the strain. Using clean water without excess chlorine is essential for the successful application of this biological control agent.