Chitosan oligosaccharide + oligogalacturonide

COS-OGA (chitosan oligosaccharide + oligogalacturonide) is a cutting-edge active ingredient classified as an elicitor. Unlike conventional fungicides that act directly on pathogens, COS-OGA acts as a plant vaccine. It triggers the plant's natural defense systems, effectively priming it to respond more rapidly and intensely to a wide range of biotic and abiotic stresses.

The mechanism of action is based on molecular signaling. When applied to foliage, these oligosaccharides are recognized by specific receptors on the plant cell surface, which the plant perceives as a warning of infection. This triggers a cascade of biochemical reactions, including the production of phytoalexins, enzymes, and structural reinforcements of cell walls.

This compound is used on a variety of high-value crops, including grapes, tomatoes, cucumbers, and tree fruits. It is highly effective in managing diseases such as powdery mildew, grey mold, and various blights. It serves as an essential tool for growers looking to reduce their dependence on synthetic pesticides while maintaining high crop yields and health standards.

Application strategies focus on preventive usage. Growers should apply the product early in the growth cycle to ensure the immune system is fully primed before pathogen exposure. Because the product works through systemic signaling rather than direct contact toxicity, it is best applied at regular intervals to maintain high levels of defensive proteins in the plant tissues.

• No MRLs (Maximum Residue Limits), allowing for harvest flexibility.
• Safe for beneficial insects, including honeybees and predatory mites.
• Helps prevent the development of resistance to traditional fungicides.
• Compatible with most conventional chemical crop protection programs.

Safety measures include the use of basic protective equipment such as gloves and protective eyewear to prevent skin and eye irritation. While the substance is considered non-toxic to most non-target organisms, it is important to avoid ingestion and direct exposure to eyes. Always consult the specific product label for regional regulatory requirements and handling instructions.