Qingdao Ceres Agritech Co., Ltd.

COS-Chitosan Oligosaccharide

COS (Chitosan Oligosaccharide) is a high-purity, enzymatically produced plant resistance inducer (plant vaccine) with optimized DP3-7 structure. It effectively boosts crop immunity, protects plants from fungal, bacterial and viral diseases, and promotes growth while enhancing stress tolerance and soil health. As a core biological control solution, it significantly reduces pesticide usage, making it the top choice for sustainable crop protection.

Outstanding Features

  • Highest purity: 93.4% purity verified by SGS, with DP3-7 content ≥80%.

  • Superior bioactivity: Optimized degree of polymerization (DP 3-7) for maximum efficacy.

  • Excellent solubility: Lightest color and most transparent solution for easy application.

Product Efficacy

  • Boost plant immunity (acts as a plant vaccine).

  • Promote crop growth.

  • Improve plant stress tolerance.

  • Protect crops against fungal, bacterial and viral diseases.

Guaranteed Analysis (w/w)

AppearanceLight Yellow Powder
SmellA little taste of acetic acid
Chitosan Oligosaccharide88%
3-7 Polymerization Oligosaccharide80%
Degree of Deacetylation85%
Molecular Weight≤ 1500 Da
Moisture≤ 10%
Ash Content≤ 1.5%
pH5.0-7.0

Directions For Use

  • This product is suitable for a wide range of applications, including agricultural crops, fruit trees, landscaping, pastures, grains, and horticultural crops.

  • Dosage & Application Methods:
    Root Application: 400-500g per hectare (ha);
    Foliar Spray: Dilute by 20000-30000 times.

Packaging And Storage

  • Available in 1kg, 5kg, 10kg, 20kg bag or 500kg bulk bag.

  • To be stored in cool, dry and ventilated place, under normal condition with the original packing.

  • Validity: 3 years.

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