"Plant vaccines" are essentially drugs that can stimulate the plant immune system. Through biological stimulant technology, they can activate the plant's own defense mechanism, thereby achieving the goals of disease resistance and pest prevention. Chitosan oligosaccharides, also known as chitosan oligomers or low-molecular-weight chitosan, are products obtained after the degradation of chitin or chitosan through special biological enzyme technology.

Chitosan oligosaccharides, this miraculous substance hailed as the "plant vaccine", not only can induce plants to develop extensive resistance and effectively enhance their own defense capabilities, but also can significantly inhibit the growth of various plant pathogenic microorganisms. Moreover, chitosan oligosaccharides also have the function of plant growth regulators, which can promote the metabolism of plants and thereby help increase crop yields. 
Induce the plant's own defense response and produce broad-spectrum resistance substances
The unique feature of chitosan oligosaccharides lies in their ability to rapidly induce crops to produce a large amount and diverse resistance substances, such as salicylic acid and phytohormones, thereby significantly enhancing the plant's own immune ability. Once a pathogen invades, these resistance substances can attack and eliminate the pathogen from multiple directions and for a long time.
In addition, chitosan oligosaccharides can also induce the generation of plant resistance proteins, lignin, and chitin polymer, strengthen the plant cell wall, and thereby enhance the plant's resistance to pests and diseases.
Inhibit and kill plant pathogens and pests
Chitosan oligosaccharides not only enhance the immunity and disease resistance of crops, but also promote the proliferation of beneficial bacteria, showing the efficacy similar to antibiotics. It has direct inhibitory and killing effects on pathogenic bacteria such as viruses, fungi, and bacteria, especially showing significant effects in the prevention and control of viral diseases.
Practice has proved that chitosan oligosaccharides are very effective in preventing and controlling diseases such as diseases, viruses, leaf curl, root rot, etc. When plants are faced with other multiple diseases or severe conditions, chitosan oligosaccharides can work synergistically with external inhibitory pesticides (reduced use), both internally and externally, and in most cases can achieve satisfactory results.