Foliar spray
50–100 ppmReference amount: 2–5 g per mu (30–75 g/ha). Apply at 7-day intervals for three consecutive applications.
AGRICULTURE · AGRICULTURAL-GRADE COSAgricultural-Grade
Agricultural-Grade
Chitooligosaccharide
A crop-focused oligosaccharide ingredient for plant nutrition, soil programs and plant-defense strategies.
We supply agricultural-grade COS for growers and agricultural input formulators looking to build more effective crop and soil solutions.
Agricultural-grade COS · Yellow-brown powder · COS content ≥85%A CROP-FOCUSED INGREDIENT
Support the plant. Strengthen the growing system.
Chitooligosaccharide (COS) can influence the soil microbial environment, encourage beneficial microbial growth and activate plants’ natural defense responses.
Its crop applications span foliar nutrition, root-zone delivery and soil improvement. COS is used in the development of biopesticide, plant growth regulator and fertilizer formulations.
CROP APPLICATIONS
Designed for diverse crop systems.
Application areas include fruit trees, vegetables, root and tuber crops, tobacco, medicinal plants and cotton.
01Fruit trees
02Vegetables
03Root & tuber crops
04Tobacco
05Medicinal plants
06Cotton
PLANT DEFENSE & CROP PROTECTION
Activate the natural plant defense response.
COS activates plant defense pathways and helps plants respond to disease and environmental stress.
Crop-protection focus
COS has demonstrated application potential against wheat mosaic disease, cotton Verticillium wilt, rice blast and tomato late blight.
WheatCottonRiceTomato
APPLICATION DIRECTIONS
Flexible routes of application.
The recommended rates below are expressed per Chinese mu (1 mu ≈ 667 m²) and per hectare. Adjust application timing to crop growth and field conditions.
Drench or drip irrigation
20–40 g per muEquivalent to approximately 300–600 g/ha for root-zone delivery.
Soil improvement
200–800 g per muEquivalent to approximately 3–12 kg/ha. May be applied together with basal fertilizer.
Tank-mix compatibility
COS can be mixed with pesticides, foliar fertilizers, water-soluble fertilizers and biological regulators. Do not mix with alkaline pesticides.
AGRICULTURAL-GRADE PRODUCT DATA
Quality specifications.
Defined product parameters for agricultural input evaluation.
| Appearance | Yellow-brown powder |
|---|---|
| Molecular weight | ≤3,000 Da |
| Chitooligosaccharide content | ≥85% |
| Moisture | ≤10.0% |
| Ash | ≤2.0% |
| Water-insoluble matter | ≤1.0% |
| pH | 5.0–7.0 |
| Arsenic | ≤0.5 ppm |
THE SCIENCE OF COS IN AGRICULTURE
Plant signaling meets practical crop care.
Scientific reviews describe COS as a carbohydrate elicitor that plants can recognize, activating defense signaling and stress-response pathways. Research also examines its role in plant growth and resilience across crop and environmental conditions.
Biotechnological approaches for field applications of COS to induce innate immunity in plants →Chitooligosaccharide-induced plant stress resistance · Carbohydrate Polymers →Read our crop research article: COS as a plant-defense elicitor →LET'S TALK CROP APPLICATIONS
Build your next agricultural input with COS.
Tell us about the crop, application method and target market. We’ll share the agricultural-grade specification and discuss a suitable supply option.
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