| Abstract |
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The invention discloses a wide-spectrum flower and fruit protection agent for vegetables comprising cucumbers, tomatoes, capsicums and the like, fruit trees of apples, pears,?mangoes, litchis and the like, and other flowering and fruiting plants, and the active component of the agent is chitosan oligosaccharide or a chitosan oligosaccharide derivative. The chitosan oligosaccharide is an oligosaccharide obtained by glucosamine chaining through beta-1,4-glycosidic bonds, the molecular weight of the chitosan oligosaccharide is 300-10000Da, and the deac |