Greater burdock (aerial parts)

Greater burdock (Arctium lappa L.) aerial parts are widely recognized in sustainable agriculture as a source of bioactive compounds used for crop protection. This plant-derived substance serves as a botanical biopesticide, offering an ecological solution for managing pest populations and fungal pathogens without relying on synthetic chemicals.

The chemical class of these substances is primarily composed of phytochemicals, including sesquiterpene lactones, polyacetylenes, and phenolic acids. These organic molecules act as active ingredients that interfere with the physiological processes of target pests and inhibit the metabolic pathways necessary for fungal spore development.

The mechanism of action is multifaceted. It acts as a contact repellent and an anti-feedant for various insect larvae, including lepidopteran pests. Simultaneously, it creates a protective barrier on leaf surfaces that disrupts the germination and colonization of common fungal diseases like powdery mildew and various leaf spots.

Greater burdock extracts are primarily applied to vegetables, fruit crops, and ornamental plants. The substance is most effective when used as a preventive measure or at the initial signs of infestation. Foliar application is the standard method, ensuring thorough coverage of both sides of the leaves where pathogens and pests typically reside.

When using this substance, it is critical to observe specific precautionary measures. Although botanical, extracts can still cause irritation if mishandled. Farmers should use protective gear and avoid spraying during high heat or direct sunlight to prevent premature chemical degradation. Storage of prepared solutions is limited, and they should be used shortly after preparation to maintain optimal biological activity.