Preparation method and application of pesticide preparation containing pyraclostrobin and tebuconazole

A technology for pyraclostrobin and pesticide formulations, applied in the field of pesticide formulation preparation, can solve the problems of easy melting and failure of pyraclostrobin, and achieve the effects of excellent control effect, easy storage and good persistence.

Inactive Publication Date: 2019-01-25
JIANGSU SHENGJIU AGROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fungicidal composition uses pyraclostrobin and tebuconazole as the main active ingredients, and can be formulated into emulsifiable concentrate, suspension concentrate, water emulsion, wettable powder, microemulsion or water dispersion by conventional methods with pesticide adjuvants and excipients. Granules; the fungicidal composition can be used to prevent and control diseases of cereals, melons, fruits or vegetable crops, but because pyraclostrobin is easy to melt under high temperature conditions, the conventional dosage forms are stored for too long or stored in high temperature, humidity, etc. conditions, prone to failure

Method used

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  • Preparation method and application of pesticide preparation containing pyraclostrobin and tebuconazole
  • Preparation method and application of pesticide preparation containing pyraclostrobin and tebuconazole

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of the pesticide preparation containing pyraclostrobin and tebuconazole comprises the following steps:

[0029] Step 1, add polylactic acid-glycolic acid copolymer into the mixed solution of N,N'-dicyclohexylcarbodiimide, 4-dimethylaminopyridine, and tetrahydrofuran, heat and stir at a temperature of 55°C and a stirring speed of 150rpm until The polylactic acid-glycolic acid copolymer is completely dissolved; wherein the mass ratio of polylactic acid-glycolic acid copolymer, N,N'-dicyclohexylcarbodiimide, 4-dimethylaminopyridine, and tetrahydrofuran is 6:20:5: 75;

[0030] Step 2, dissolving polyvinyl alcohol in water, adding tebuconazole, and mixing evenly; under ultrasonic conditions, adding the mixed solution prepared in step 1 dropwise, and ultrasonicating for more than 1 hour at an ultrasonic frequency of 200 Hz; after filtering, the obtained Solid matter; Wherein the mass ratio of polyvinyl alcohol, water, tebuconazole is 10:100:20;

[003...

Embodiment 2

[0035] The preparation method of the pesticide preparation containing pyraclostrobin and tebuconazole comprises the following steps:

[0036] Step 1, add polylactic acid-glycolic acid copolymer into the mixed solution of N,N'-dicyclohexylcarbodiimide, 4-dimethylaminopyridine, and tetrahydrofuran, heat and stir at 60°C, stirring speed 160rpm until The polylactic acid-glycolic acid copolymer is completely dissolved; wherein the mass ratio of polylactic acid-glycolic acid copolymer, N,N'-dicyclohexylcarbodiimide, 4-dimethylaminopyridine, and tetrahydrofuran is 8:25:7: 68;

[0037] Step 2, dissolving polyvinyl alcohol in water, adding tebuconazole, and mixing evenly; under ultrasonic conditions, adding the mixed solution prepared in step 1 dropwise, and ultrasonicating at an ultrasonic frequency of 250 Hz for more than 1 hour; after filtering, the obtained Solid matter; Wherein the mass ratio of polyvinyl alcohol, water, tebuconazole is 10:100:25;

[0038] Step 3, dissolving mic...

Embodiment 3

[0042] The preparation method of the pesticide preparation containing pyraclostrobin and tebuconazole comprises the following steps:

[0043] Step 1, add polylactic acid-glycolic acid copolymer into the mixed solution of N,N'-dicyclohexylcarbodiimide, 4-dimethylaminopyridine, and tetrahydrofuran, heat and stir at 65°C, stirring speed 180rpm until The polylactic acid-glycolic acid copolymer is completely dissolved; wherein the mass ratio of polylactic acid-glycolic acid copolymer, N,N'-dicyclohexylcarbodiimide, 4-dimethylaminopyridine, and tetrahydrofuran is 10:30:8: 62;

[0044] Step 2, dissolving polyvinyl alcohol in water, adding tebuconazole, and mixing evenly; under ultrasonic conditions, adding the mixed solution prepared in step 1 dropwise, and ultrasonicating at an ultrasonic frequency of 300 Hz for more than 1 hour; after filtering, the obtained Solid matter; wherein the mass ratio of polyvinyl alcohol, water, and tebuconazole is 10:100:30;

[0045] Step 3: Dissolve ...

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Abstract

The invention belongs to the technical field of pesticide, and particularly relates to a preparation method and application of a pesticide preparation containing pyraclostrobin and tebuconazole. The method comprises the following steps: step 1, adding a polylactic acid-glycolic acid copolymer into a mixed solution of N,N'-dicyclohexylcarbodiimide, 4-dimethylaminopyridine and tetrahydrofuran; step2, dissolving polyvinyl alcohol in water, adding the tebuconazole and mixing uniformly; in an ultrasonic condition, dropwise adding a mixed solution prepared in the step 1, performing ultrasonic treatment continuously, and filtering to obtain a solid substance; step 3, dissolving cellulose in a mixed solution of tetraethylammonium hydroxide, tetraethylphosphonium hydroxide and methylbenzene, adding the pyraclostrobin and isolongifolenone, and stirring uniformly; step 4, adding the solid substance, which is prepared in the step 2, into a mixed system prepared in the step 3, performing ultrasonic treatment, and introducing nitrogen gas; and step 5, freezing, drying, and carrying out superfine grinding by using a sand mill to prepare a product; the product has an excellent control effect on fusarium graminerum and blumeria graminis.

Description

technical field [0001] The invention belongs to the technical field of pesticides, in particular to a preparation method and application of a pesticide preparation containing pyraclostrobin and tebuconazole. Background technique [0002] Pyraclostrobin is a new type of broad-spectrum fungicide developed by BASF AG. The characteristics of biosafety, it has good activity against almost all fungal diseases such as powdery mildew, rust, net spot, downy mildew, rice blast, etc. It can be used for grains, rice, peanuts, grapes, potatoes, fruit trees, vegetables, coffee It is a fungicide with broad application prospects. Pyraclostrobin is a nematode respiration inhibitor, the mechanism of action is to exhibit antibacterial activity by inhibiting the electron transfer system in nematode and interacting with protein complexes. The agent can prevent spore germination, spore growth, hyphae invasion, appendage formation and spore formation in the life chain of pathogenic bacteria; Pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N43/653A01N47/24A01P3/00
CPCA01N43/653A01N47/24
Inventor 周国庆朱福新王夕方
Owner JIANGSU SHENGJIU AGROCHEM
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