Dora Sailor

Dora Sailor is a chitosan oligosaccharide formulation to activate plants’ resistance ability to diseases & stress. Widely used in seed & soil treatment.

Product Description

Chitosan oligosaccharide supplier


Due to the high environmental risk of traditional chemical pesticides, Biological solutions for controlling plant diseases are highly recommend. Chitosan oligosaccharide is the biological control solution with the features of non-toxic, Bio-Degradable, good compatible.

Dora Sailor contains chitosan oligosaccharide (enzymatic hydrolysis), which has outstanding water-solubility, high biological activity and easily absorbed utilized by crops.

For now, Dora Sailor are widely used on

Seed pretreatment – disease resistance, strengthen seedlings

Soil treatment – prevent harmful pathogens and nematodes, improve soil condition, stimulte roots growth

Foliar spraying – induce crops’ resistance to stress & diseases



  1. Dora Sailor Powder………………≥90% Cos
  2. Dora Sailor Liquid………………..≥ 10% Cos

chitosan oligosaccharide product


Compare to normal chitosan oligosaccharide

  • Molecular weight<1500, high activity
  • Excellent water solubility & flowability
  • Obtained by degradation of chitosan by enzymatic hydrolysis


Benefits of Dora Sailor

1. Increase seed germination

After seed treatment, it not only can improve seed vigor & germination rate, but also can stimulae the seeds immune & growth system to improve the diseases resistance & growth rate.

It has been experimentally demonstrated that we apply on rye grass seed, its germination index increased 33.5% and vitality index increased 59.5%.

improve seed germination rate

2. Increase resistance ability to stress & diseases

For stress, it can induce plants general regulation of endogenous hormones.

  • Improve plant’s water retaining capacity
  • increase the lodging/drought-resistance
  • Help the recovery of damaged plants

For diseases, it can thicken the plant’s cell walls and instantly induce defense reactions to various kinds of virus, fungus and bacteria.

chitosan oligosaccharide control plant diseases

3. Improve soil micro-environment

Control harmful nematodes  Apply Chitosan oligosaccharide in soil is effective to control nematodes. Cos can stimulate the breeding of chitinolytic microbes to ruin the cuticle of nematodes eggs.

Increase growth of plant-benificial rhizobacteria After applying Chitosan oligosaccharide, beneficial microbes can easily prosper and their activity stimulated. Great help to build a healthy soil micro-environment.

soil condition improve



How to use Chitosan oligosaccharide


Dora Sailor Powder 

Seed treatment: 5g for 100-200Ibs seeds   

Foliar spray: 25-50g/ha per time, total 3-5 times per season 

Water flush: 500g per 1000L water per hectare


Dora Sailor Liquid 

Seed treatment: 50ml for 100-200Ibs seeds   

Foliar spray: 200-500ml/ha per time, total 3-5 times per season 

Water flush: 2-4L per 1000L water per hectare


General principles for the mixing of Cos with pesticides

Pay attention to the mixing sequence: first dilute the Cos product according to the usage instructions, then dilute the pesticide into the mother liquor, and finally pour the pesticide mother liquor into the Cos dilution. The order of compounding cannot be reversed.

Solubility Test

Production Department

Apply for sample

Difference of CHT & CTS & COS

What is the difference between chitin, chitosan & chitosan oligosaccharide ?


What is the difference between chitin, chitosan & chitosan oligosaccharide

Field Trial

Dora Sailor used on Tobacco

chitosan oligosaccharide used on tobacco


chitosan on tobacco

After using Dora Sailor on tobacco, it have very good effect on control tobacco diseases. Especially tobacco mosaic virus, the control efficiency is reach to 84.45%.

Besides, Chitosan oligosaccharides also have good control effects on tomato virus diseases, pepper virus disease, cotton verticillium wilt disease, rice blast disease and other crop diseases.



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