Rheum officinale root extract

Rhubarb root extract belongs to the group of botanical biopesticides, acting primarily through the content of anthraquinones, such as emodin, chrysophanol, and rhein. These compounds possess significant antimicrobial and repellent activity, disrupting the metabolic processes of harmful organisms.

The mechanism of action of the extract is based on the direct suppression of pathogenic fungi development by damaging their cell membranes and inhibiting the enzymatic activity required for spore germination.

Against insects, the active substance exhibits an antifeedant effect, causing pests to cease feeding, which leads to their death or a significant reduction in the population on the treated area.

Preparations based on this extract act through contact and ingestion, requiring thorough and uniform coverage of plant surfaces with the working solution to achieve maximum efficacy.

An important feature of this group is their ability to induce Systemic Acquired Resistance (SAR) in plants, strengthening their immunity against a wide range of phytopathogens.

The extract is used to combat powdery mildew on vegetable, berry, and ornamental crops, effectively stopping the spread of fungal growth on the leaves.

The product shows activity against certain species of aphids, whiteflies, and spider mites, affecting their larval stages and adults in open and greenhouse conditions.

The formulations are effective against gray mold and various types of leaf spots that develop in conditions of high humidity and moderate temperatures.

The use of the extract is justified at the first signs of infestation, as it has a pronounced curative and preventive effect during the early stages of invasion.

• Powdery mildew (Erysiphaceae)
• Aphids (Aphididae)
• Whiteflies (Aleyrodidae)
• Gray mold (Botrytis cinerea)

Application rates depend on the concentration of the active ingredient in the specific formulation and typically vary from 2 to 5 liters per hectare for field crops.

The working solution is prepared immediately before application by diluting the concentrate in clean water according to the manufacturer's instructions for the specific product.

The number of treatments ranges from 3 to 5 times per season, with an interval of 7 to 10 days between applications, ensuring constant protection during peak pest activity periods.

Spraying is recommended during morning or evening hours in the absence of intense sunlight to avoid the rapid degradation of the active components.

Full efficacy of the product is achieved provided that the entire vegetative mass is evenly wetted, including the underside of the leaf blade.

Rhubarb root extract is compatible with most biopesticides, however, it is not recommended to mix it with highly alkaline compositions, which may deactivate organic molecules.

Given the natural origin of the substance, the pre-harvest interval is practically non-existent, making it safe for use during the fruiting period.

Strict precautions must be followed when working with the concentrated extract: use personal protective equipment for the skin and respiratory system.

Storage of the preparation should be carried out in a place protected from light at the temperature indicated by the manufacturer to prevent the degradation of the active substances.

Disposal of unused solution into water bodies is prohibited, as plant extracts can affect the microbiological balance of the aquatic environment at high concentrations.