How Does Oligochitosan Enhance Plant Growth and Disease Resistance?

2025-08-13 15:50

Technical Introduction

Oligochitosan is a low-molecular-weight derivative of chitosan, produced by hydrolysis of chitosan.
It retains the biodegradability and biocompatibility of chitosan but has better solubility, faster absorption, and stronger bioactivity.
Oligochitosan acts as a plant elicitor, stimulating natural defense responses and promoting metabolic activities for growth and stress tolerance.


Applications

1. Agriculture & Horticulture

  • Plant Elicitor: Activates defense enzymes and improves resistance to fungi, bacteria, and viruses.

  • Growth Enhancer: Stimulates root growth, chlorophyll synthesis, and nutrient uptake.

  • Foliar Spray: Improves flowering, fruit set, and crop yield.

2. Seed Treatment

  • Enhances germination rates and strengthens early seedling vigor.

3. Hydroponics & Greenhouse Cultivation

  • Promotes root system health and reduces pathogen damage in nutrient solutions.

4. Post-Harvest Application

  • Forms a protective coating to reduce spoilage and extend shelf life of fruits and vegetables.


Advantages

  • High Bioactivity: Faster uptake by plants than standard chitosan.

  • Eco-Friendly: Biodegradable, non-toxic, and safe for humans and environment.

  • Stress Resistance: Enhances tolerance to drought, salinity, heat, and diseases.

  • Versatile Use: Suitable for foliar, soil, seed, and post-harvest applications.

  • Improved Yield & Quality: Boosts crop growth, nutrient absorption, and fruit quality.


Typical Parameters

PropertyValue
SourceHydrolyzed chitosan
FormPowder / Liquid
Molecular Weight1,000 – 10,000 Da
Degree of Deacetylation75 – 95%
SolubilitySoluble in water
pH (1% solution)4.0 – 6.0
AppearanceLight yellow to white powder
Shelf Life2 years

FAQs

Q1: How is oligochitosan different from regular chitosan?
A1: It has lower molecular weight, better solubility, faster plant absorption, and stronger bioactivity.

Q2: Can it be applied directly to leaves?
A2: Yes, foliar spraying is one of the most effective methods.

Q3: Is it compatible with organic farming?
A3: Yes, it is generally accepted in organic systems.

Q4: Does oligochitosan protect against all pathogens?
A4: It boosts plant defenses against many fungi, bacteria, and viruses, but is not a chemical pesticide.

Q5: Can it be mixed with fertilizers or other biostimulants?
A5: Yes, but pre-testing is recommended for tank mix compatibility.

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