Application of active polysaccharides in corn top rot control

Abstract

The invention relates to application of active polysaccharides in corn top rot control. Active polysaccharide 1.0-361ppm is used dependently foliar spray, combined with soluble salt containing plant nutrition in use or combined with pesticide in use, and is evident in corn top rot control effect. The active polysaccharide comprises chitosan oligosaccharide and glucosan and has evident resistance induction activity on crops, environmental stress resistance is enhanced by inducing basic resistance, and occurrence and development of corn top rot are prevented and controlled.

Description

technical field [0001] The invention relates to a new application of active polysaccharides, in particular to the application of active polysaccharides in preventing and treating corn top rot. Background technique [0002] Corn top rot is a new disease of corn, which can be divided into bacterial infection, fungal infection and mixed infection of fungi and bacteria in terms of symptoms. Symptoms of maize top rot are complex and diverse, and can infect and develop diseases throughout the entire growth period of maize. At the seedling stage, the plants grow slowly, the edges of the leaves lose chlorosis, yellow streaks appear, the leaves are deformed, shrunk or twisted, and the seriously diseased plants wither or die; in the middle and late stages of growth, the leaves show that the bases are rotten, only the main veins remain, and the middle and upper parts are intact but Many deformities, the top of the epigenetic new leaves rot, resulting in short leaves, dead or incomplet...

AI Technical Summary

Problems solved by technology

[0003] At present, there are few studies on corn top rot at home and abroad, lack of systematic research and effective control measures, the pathogenesis is unknown, and the control is difficult. The bactericides, fungicides, or both Mixed and treated symptomatically, there was no obvious control effect, and there was no report on the effective control of corn top rot.

Through many years of research on the pathogenesis, the inventor classified corn top rot from a pathogenic disease to an environmental stress disease for the first time in China, and by inducing basic resistance, improving disease resistance and environmental stress resistance of diseased plants, slowing down and eliminating The allergic reaction caused by pathogenic bacteria promotes the compatible symbiosis between pathogenic bacteria and corn, and prevents and controls the occurrence and development of corn top rot.

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