High Boiling Tar Acid

The primary mechanism of their action is the denaturation of proteins in the cell membranes of microorganisms. This leads to irreversible metabolic disturbances and the death of pathogenic cells.

Substances of this group are capable of penetrating deep into plant tissues or substrates, providing prolonged protective effects due to their chemical stability and low volatility.

Thanks to the high concentration of active molecules, these phenols act as contact preparations, instantly blocking the vitality of fungal spores and bacteria upon direct contact.

In field conditions, they exhibit growth inhibitory properties for certain types of unwanted vegetation, which allows them to be used in highly specialized treatment schemes.

This group of substances is widely used to combat soil-borne pathogens that cause root rots, fusarium, and verticillium wilt in various agricultural crops.

They are effective against pathogens causing mold in seeds and seedlings, making them an important tool for soil preparation and pre-sowing treatment of substrates.

Preparations based on these compounds successfully suppress the development of phytopathogenic bacteria that are resistant to the effects of classical fungicides such as triazoles or strobilurins.

In some agricultural systems, they are used to disinfect greenhouses, cold frames, and storage containers for produce to prevent the spread of infection in protected ground.

• Fungal diseases (fusarium, pythium).
• Pathogenic soil bacteria.
• Root rot complexes.

Application rates for high-boiling phenols depend on the degree of soil infestation and the type of crop grown; therefore, dosage calculation must be performed strictly according to the manufacturer's instructions.

Soil treatment is carried out well in advance of sowing, typically 14–20 days earlier, to allow the active substances to disperse and reduce their phytotoxicity for cultivated plants.

When used as disinfectants for facilities, more concentrated solutions are applied via surface spraying followed by a specific exposure time.

Exceeding recommended rates is prohibited, as high concentrations of phenolic compounds can lead to temporary suppression of soil microflora and stunted crop growth.

Waiting periods after applying the product must be strictly observed, as residual amounts of the substances can negatively affect the germination of sensitive crop varieties.

Working with high-boiling phenols requires strict adherence to personal safety measures, including the use of protective clothing, respirators, and chemical-resistant gloves.

These substances have a distinct odor and an irritant effect on mucous membranes; therefore, application should be conducted in well-ventilated areas or while using respiratory protection.

In case of contact with the skin, the affected area must be immediately washed with plenty of running water and soap to avoid chemical burns or the absorption of toxins.

The preparations must not be mixed with most biological agents, as phenols can suppress the activity of beneficial microorganisms contained within the latter.

Storage must be maintained in original factory packaging in cool rooms, preventing exposure to direct sunlight and keeping them away from food products.