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

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...

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

There is no relevant report on the novel oxazole-thiadiazole compound copper-3-hydroxyl-5-methylisoxazole-2-amino-5-mercapto-1,3,4-thiadiazole and its preparation method , and 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

Images