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A kind of broad-spectrum oligosaccharide compound fungicide and its application

A technology of compound fungicides and compound agents, applied in the direction of fungicides, applications, biocides, etc., to achieve the effect of not producing drug resistance, inducing plant disease resistance, and having a wide range of sources

Active Publication Date: 2018-11-27
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The combination of oligosaccharide biopesticide and chemical agent thiamethoxam as a new type of pesticide for the control of plant pathogenic microorganisms has not been reported in literature and patents

Method used

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  • A kind of broad-spectrum oligosaccharide compound fungicide and its application
  • A kind of broad-spectrum oligosaccharide compound fungicide and its application
  • A kind of broad-spectrum oligosaccharide compound fungicide and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1 Chitosan-oligosaccharide and thiamethoxam compound preparation inhibits apple rot pathogen

[0019] In this compound preparation, after mixing thiamethoxam and chitosan oligosaccharide according to the concentrations stated in Table 1, precipitation occurs, and 5% ammonia water is added until the precipitation dissolves to form a uniform solution.

[0020] After compounding 2.5% chitosan oligosaccharide and 0.5-2.0% thiamethoxam, the inhibitory effect on apple rot pathogens after dilution 1000 times is shown in Table 1. Synergistic effect, reducing the dosage of thiamethoxam in the compound preparation can achieve the effect of using thiamethoxam alone. The antibacterial test was carried out by the antibacterial circle method, and the relative antibacterial rate was calculated by measuring the size of the antibacterial circle.

[0021] Table 1 Inhibitory effect of chitosan oligosaccharide and thiamethonin compound on apple rot pathogen

[0022]

Embodiment 2

[0023] Example 2 Field efficacy of chitosan-oligosaccharide and thiamethoxam compound preparation on apple rot

[0024] 2.5% chitosan oligosaccharide and 2.0% thiamethoxam compound agent for the control of apple mosaic disease field efficacy test results show that the compound water agent diluted 1000 times, has a control effect on apple rot, up to 95.0%. The control effect is 88.3% higher than that of thiamethoxam alone.

[0025] Test site: Luochuan County, Shaanxi Province. The application method adopts the trunk smear method. Before applying the medicine, scrape the bark of the diseased part to the phloem with a knife, and fully apply the medicinal solution to the diseased scar, and at the same time, fully apply the medicinal solution within 2cm around the diseased scar.

[0026] Table 2 Control effect of chitosan oligosaccharide and thiamethoxam compound preparation on apple rot

[0027]

Embodiment 3

[0028] Example 3 Carrageenan oligosaccharides and thiamethoxamin compound preparation inhibiting effect on apple rot pathogen

[0029] In this compound, after mixing thiamethoxam and carrageenan oligosaccharide according to a certain ratio, precipitation occurs, and 0.2% sodium hydroxide is added until the precipitation dissolves to form a uniform solution.

[0030] Table 32.5% carrageenan oligosaccharides and 0.5-3.0% thiamethoxam compound 1000-fold dilution of the results of the inhibition of apple rot pathogens

[0031]

[0032]

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PUM

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Abstract

The invention relates to a fungicide compound containing oligosaccharides, wherein the oligosaccharides include sodium alginate oligosaccharides and their derivatives, chitosan oligosaccharides and their derivatives, oligogalacturonic acid and its derivatives, etc. One or more, and a broad-spectrum fungicide thiamethoxam. By mixing the two in different proportions, it forms a soluble compound, which is effective in the prevention and treatment of cucumber downy mildew, pear scab, apple scab, apple rot, citrus anthracnose, citrus canker, grape black pox, etc. Both bacterial and fungal diseases have synergistic effect. The dosage of oligosaccharides and their derivatives in the compound is 2.5-10%, the dosage of thiamethoxam is 0.5-4.0%, add 5-10% ammonia water and 0.2-10% sodium hydroxide to help dissolve, dilute 1000 times and use, the antibacterial effect up to 40‑99%. The compound preparation of oligosaccharides and their derivatives and thiamethoxam can not only maintain the original characteristics of the thiamethoxam fungicide, such as high spectral efficiency, low toxicity and safety, but also increase the oligosaccharide biopesticide, reduce the amount of chemically synthesized fungicides, overcome or delay Drug resistance, improve the crop's own defense response and crop yield, improve the quality of agricultural products, enhance the safety of application, and develop new environmentally friendly compound fungicides.

Description

technical field [0001] The invention relates to a compound preparation of oligosaccharides or oligosaccharide derivatives and fungicide thiametholone and its application in preventing and treating plant pathogenic bacteria. Background technique [0002] Agriculture is the foundation of human society and economic development. Plant disease is a major factor restricting the sustainable development of agriculture. Plant disease control plays an important role in sustainable agriculture. With the abuse of chemical agricultural preparations, plant pathogens gradually mutate and increase their drug resistance, making them more rampant. Finding safe, efficient and environmentally friendly new pesticides has become a top priority. [0003] Thiempyridone is an organic heterocyclic fungicide, which has a strong inhibitory effect on fungi and bacterial diseases. It has the characteristics of high efficiency, safety, low toxicity, and low residue. Elixir and easy to remove 1.6% thiame...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N43/80A01P3/00A01N43/16
Inventor 赵小明尹恒杜昱光王文霞刘启顺
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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