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Oxazole thiadiazole organic copper compound, its preparation method, preparation and application in controlling agricultural plant diseases

A technology for oxazole thiadiazoles and oxazole thiadiazoles is applied in the field of preventing and controlling agricultural plant diseases, oxazole thiadiazole type organo-copper compounds and their preparation fields, and can solve the phytotoxicity of sensitive plants, the value-added of rust tick, Crop phytotoxicity and other problems, to achieve the effects of easy industrial production, mild reaction conditions, and broad bactericidal spectrum

Inactive Publication Date: 2012-06-27
NORTHWEST A & F UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is characterized by an advantageous protective fungicide with low cost, but its disadvantages are: first, it is easy to cause phytotoxicity, and its use is prohibited or restricted during the flowering and young fruit stages; second, its miscibility is poor, and most of the inorganic copper preparations are Alkaline pesticides cannot be mixed with most pesticides, and it is inconvenient to use; third, it is easy to cause the value-added of mites and rust ticks, which increases the cost of control in disguise; fourth, the treatment effect is not strong, and it is not easy to use on rice use
[0008] Although copper fungicides have many advantages, excessive copper ions can easily cause phytotoxicity to crops
Studies have shown that copper ions can kill pathogenic bacteria at 10mg / L, and cause phytotoxicity to sensitive plants when the concentration reaches 30mg / L
No new oxazole-thiadiazole compound copper-3-hydroxy-5-methylisoxazole-2-amino-5-mercapto-1,3,4-thiadiazole and its preparation method have been reported , it has not been found that the novel oxazole-thiadiazole compound copper-3-hydroxy-5-methylisoxazole-2-amino-5-mercapto-1,3,4-thiadiazole is used for agricultural plant diseases Related reports on prevention and treatment

Method used

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  • Oxazole thiadiazole organic copper compound, its preparation method, preparation and application in controlling agricultural plant diseases
  • Oxazole thiadiazole organic copper compound, its preparation method, preparation and application in controlling agricultural plant diseases
  • Oxazole thiadiazole organic copper compound, its preparation method, preparation and application in controlling agricultural plant diseases

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 6.6g of 99% purity of 3-hydroxyl-5-methylisoxazole, 5.4g of 98% of 2-amino-5-mercapto-1,3,4-thiadiazole and 160ml of 75% mass fraction The ethanol aqueous solution of % is thrown into 250ml reaction bottle at one time, is heated and dissolved at the temperature of 72 ℃, obtains solution A, and 2.5g purity is 99% copper sulfate pentahydrate and 25ml distilled water to join in the 250ml reaction bottle, heat, and Stir at a temperature of 44°C to make it fully dissolve. After the copper sulfate is completely dissolved in water, under the action of stirring, add solution A dropwise (0.02-0.05ml per drop) into the aqueous solution of copper sulfate. The dropwise addition is completed within 28 minutes, then the temperature is controlled at 70°C, and the reaction is stirred for 1 hour. After the reaction, the precipitation is allowed to stand for 3.5 hours. Washed with water, and then dried in a constant temperature drying oven at 105 ° C to obtain a yellow-green powder that ...

Embodiment 2

[0035] The preparation method of copper-3-hydroxyl-5-methylisoxazole-2-amino-5-mercapto-1,3,4-thiadiazole is the same as in Example 1.

[0036] Take the following materials in percentage by weight: 20.0% of copper-3-hydroxyl-5-methylisoxazole-2-amino-5-mercapto-1,3,4-thiadiazole prepared in this example, 1.0% octylphenol polyoxyethylene ether, 4.5% dibutyl naphthalene sulfonate sodium formaldehyde condensate, 74.5% white carbon black, according to the above ratio, mix the materials thoroughly, grind and pass through a 320-mesh sieve to obtain 20% Wettable powder of oxazole thiadiazole organocopper compound.

[0037] The tested strain is bacterial blight of rice, which is provided by the Pesticide Research Institute of Northwest Agriculture and Forestry University. The prepared 20% oxazolethiadiazole organic copper compound wettable powder is determined by routine antibacterial test according to the conventional method. 20% wettable powder of hymexazol or carbendazim (the exci...

Embodiment 3

[0039] 6.5g of 3-hydroxyl-5-methylisoxazole with 99% purity, 5.6g of 98% 2-amino-5-mercapto-1,3,4-thiadiazole and 240ml with a mass fraction of 95 The methanol aqueous solution of % is thrown into 500ml reaction bottle at one time, is heated and dissolved at the temperature of 85 ℃, obtains solution A, is that 99% copper sulfate pentahydrate and 25ml distilled water are added in the 500ml reaction bottle with 2.5g purity, heat, and Stir at a temperature of 35°C to make it fully dissolve. After the copper sulfate is completely dissolved in water, under the action of stirring, add solution A dropwise (0.02-0.05ml per drop) into the aqueous solution of copper sulfate. The dropwise addition is completed within 25 minutes, then the temperature is controlled at 65°C, and the reaction is stirred for 1 hour. After the reaction, the precipitation is allowed to stand for 4 hours. Wash, and then dry in a constant temperature drying oven at 110 ° C to obtain a yellow-green powder that is ...

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Abstract

The invention discloses an oxazole thiadiazole organic copper compound, its preparation method, preparation and application in controlling agricultural plant diseases. The preparation method comprises the following steps: adding 3-hydroxy-5-methyl isoxazole (hymexazol) and 2-amino-5-mercapto-1,3,4-thiadiazole and cupric salts in an organic solvent, reacting for 0.5-2 h, after the reaction successively carrying out separation, washing and drying to obtain the novel oxazole thiadiazole organic copper compound, that is, Cu-3-hydroxy-5-methyl isoxazole-2-amino-5-mercapto-1,3,4-thiadiazole. The obtained compound has stable properties and wide fungicide spectrum, can be made into wettable powder, dry suspending agents and aqueous suspending agents and the like, has outstanding control effects on main diseases of various crops, especially can control the diseases caused by Fusarium, aphanomyces invadans, Pythium aphanidermatum, and Corticium, and has special efficacy on various soil borne diseases and seedling damping off.

Description

technical field [0001] The invention belongs to the technical field of pesticide chemical industry, and in particular relates to an oxazole-thiadiazole organic copper compound, a preparation method, a preparation and an application in preventing and controlling agricultural plant diseases. Background technique [0002] The molecular formula of 3-hydroxy-5-methylisoxazole (hymexazole) is C 4 h 5 NO 2 , with a molecular weight of 99, soluble in most organic solvents, stable in acid and alkali solutions, non-corrosive, is a systemic fungicide and plant growth regulator, which has systemic and conductivity, can directly It is absorbed by the roots of plants, enters the plants, and moves very quickly. It only moves to the stems within 3 hours after moving in the root system, and moves to the whole body of plants within 24 hours. Its metabolites in plants are two kinds of glucosides, which are beneficial to plants. Promotes growth and root development. In addition, 3-hydroxy-5...

Claims

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Application Information

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IPC IPC(8): C07F1/08A01N55/02A01P1/00A01P3/00
Inventor 王永华张慧晓刘蒙蒙周伟王高学段金友
Owner NORTHWEST A & F UNIV
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