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Chitosan oligosaccharide composition and application

A chitooligosaccharide and composition technology, applied in the field of chitooligosaccharide composition, can solve problems such as difficult treatment, rapid development of drug resistance of bacteria, environmental pollution, etc., and achieve obvious inhibitory effect, unique bactericidal mechanism, and effective control effect Effect

Pending Publication Date: 2022-01-21
张萍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, chemical fungicides are one of the main measures to prevent and control crop diseases in agricultural production, but the long-term use of a large number of chemical fungicides not only pollutes the environment, but also causes the rapid development of drug resistance of bacteria, making the treatment more difficult

Method used

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  • Chitosan oligosaccharide composition and application
  • Chitosan oligosaccharide composition and application
  • Chitosan oligosaccharide composition and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A chitooligosaccharide composition, including chitooligosaccharide and 3-hydroxysebacic acid, the acetylation degree of the chitooligosaccharide is 20%-40%, and the chitooligosaccharide and 3-hydroxysebacic acid The weight ratio of acid is 1:0.2-20:1.5.

[0018] The chitooligosaccharide composition of this embodiment can be used in the preparation of medicines for the prevention and treatment of plant pathogenic bacteria. , Magnaporthe grisea, tomato cinerea, tomato bacterial wilt and other diseases have achieved obvious control effect. When applying the chitooligosaccharide composition of this embodiment, the main application methods are spraying and irrigation, and the dilution concentration for spraying or irrigation is 300-1500 times.

Embodiment 2

[0020] See Table 1, the present embodiment has studied the control effect of chitooligosaccharides and 3-hydroxysebacic acid compositions of different degrees of acetylation to the control effect of Xanthomonas cucumber, as can be seen from Table 1, the chitooligosaccharides of different degrees of acetylation It is mixed with 3-hydroxysebacic acid to form a composition, and after being diluted 500 times and sprayed, the two have different weight ratios, and have different control effects on 30% of the diseased strains infected with Xanthomonas cucumis. Among them, the weight ratio of 30% acetylated chitooligosaccharides to 3-hydroxysebacic acid is 1:0.3, 1:0.4, 1:0.5, the control effect is the best, and the disease has been controlled after 2 days of application, and After 5 days, no new disease occurred, and the plants grew well. Therefore, in this embodiment, considering the cost, the acetylation degree of chitooligosaccharides is determined to be 30%, and the weight ratio ...

Embodiment 3

[0024] See Table 2, the present embodiment studies the control effect of chitooligosaccharides and 3-hydroxysebacic acid compositions of different degrees of acetylation on wheat head blight, as can be seen from Table 2, the chitooligosaccharides of different degrees of acetylation It is mixed with 3-hydroxysebacic acid to form a composition, and after being diluted 600 times and sprayed, the weight ratio of the two is different, and it has different control effects on 30% of the diseased strains infected with Gibberella wheat, among which, chitosan with 35% acetylation The weight ratio of polysaccharide to 3-hydroxysebacic acid is 1:0.7, 1:0.8, 1:0.9, the control effect is the best, and the disease is under control after 2 days of application, and no new disease occurs after 4 days, and the plant grows good. Therefore, in this embodiment, considering the cost, the acetylation degree of chitooligosaccharides is determined to be 35%, and the weight ratio of chitooligosaccharide...

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Abstract

The invention relates to the technical field of agricultural crop disease control, and discloses a chitosan oligosaccharide composition which comprises chitosan oligosaccharide with the acetyl degree of 20%-40% and 3-hydroxysebacic acid, and the weight ratio of the chitosan oligosaccharide to the 3-hydroxysebacic acid is 1:0.2 to 20:1.5. The invention also discloses application. According to the chitosan oligosaccharide composition disclosed by the invention, biostimulant and chemical medicines are combined, and a formed novel bactericide has the characteristics of high efficiency, low toxicity and environment friendliness and has a unique sterilization mechanism. The chitosan oligosaccharide composition disclosed by the invention has an obvious inhibiting effect on pathogenic bacteria, and has an effective preventing and treating effect on diseased plants caused by Fusarium graminearum, cucumber angular leaf spot bacteria, cotton fusarium wilt, rice blast bacteria, tomato botrytis cinerea, Ralstorinia solanacearum and the like.

Description

technical field [0001] The invention relates to the technical field of agricultural crop disease prevention and control, in particular to a chitooligosaccharide composition and its application. Background technique [0002] Plant diseases are one of the reasons that threaten crop growth and food safety, lead to low yield or low quality of vegetables and fruits. Plant diseases cause direct economic losses up to hundreds of billions of dollars every year, more than half of which are caused by plant pathogens. At present, chemical fungicides are one of the main measures to prevent and control crop diseases in agricultural production, but the long-term use of a large number of chemical fungicides not only pollutes the environment, but also causes the rapid development of drug resistance of pathogens, making treatment more difficult. Therefore, there is an urgent need to develop new fungicides with high efficiency, low toxicity, environmental friendliness and unique mechanism of...

Claims

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Application Information

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IPC IPC(8): A01N43/16A01N37/36A01P3/00
CPCA01N43/16A01N37/36
Inventor 张萍陈凯荣黄启华司更花孙建忠王方谭陈菊龚秋林
Owner 张萍
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