Purpose of chitosan oligosaccharide and composition thereof in low temperature growth promotion

The present invention relates to a chitosan oligosaccharide of the present invention and compositions thereof for promoting the use of low temperature growth of crops, characterized in that the percentage by weight of the pesticide composition comprising chitosan oligosaccharide of chitosan oligomer 0.004% to 0.02%, to pesticidal compositions comprising chitosan oligosaccharide crop growth promoting low temperature, the pesticide composition is capable of promoting the growth of crops low temperature stress, in particular the discovery of a particular concentration of chitosan oligosaccharide having a positive regulatory effect on the growth of crops at low temperatures.