Isobavachalcone microemulsion and preparation method thereof

Abstract

An isopsoralen chalcone microemulsion and a preparation method thereof, relating to an agricultural fungicide and a preparation method thereof, comprising 0.1% to 10% of isopsoralen chalcone, 10% to 30% of a solvent and a co-solvent, The emulsifier is 12% to 20%, and the rest is water; first prepare the oil phase, mix the pure isopsoralen chalcone or the plant extract of isopsoralen chalcone with solvent and co-solvent, and stir until completely dissolved; Then prepare the water phase, add the emulsifier into the water and stir to form a transparent and uniform solution; finally, slowly drop the oil phase into the solution, stir while adding, and observe the liquid state until a transparent and uniform solution is formed. The preparation uses water instead of organic solvents, reducing environmental pollution. The microemulsion has better control effects on rice blast, apple rot, pepper anthracnose, cucumber gray mold and other plant fungal diseases and plant virus diseases. , in line with the quality standards of pesticide microemulsion products.

Description

technical field [0001] The invention relates to an agricultural fungicide and a preparation method thereof, in particular to an isopsoralen chalcone microemulsion and a preparation method thereof. Background technique [0002] Isopsoralen chalcone comes from the seeds of the leguminous plant Psoralen, which is a natural product. Moreover, isopsoralenchalcone has high inhibitory activity against important plant diseases such as rice blast fungus, tomato virus, apple rot fungus, and cucumber anthracnose fungus. Process this natural product into highly efficient, environmentally friendly, non-toxic, non-residual, less likely to produce drug resistance, relatively safe for humans and livestock, and can maintain high-quality agricultural products. Plant-derived biopesticides promote the sustainable development of agriculture. [0003] For this reason, the inventor has obtained the "Mixed Preparation of Psoralen Chalcone Compounds and Psoralen Dihydroflavonoids for Controlling ...

AI Technical Summary

Problems solved by technology

It can be seen from Table 2 in the patent "Psoralen Chalcone Compounds and Psoralen Dihydroflavonoids Mixed Preparations for Plant Disease Prevention and Control" that the EC50 of isopsoralen chalcones on apple rot pathogens (to pathogen mycelium The inhibition rate of growth rate is 50% required concentration) is 4.51 mg / L, and the EC50 of psoralen dihydroflavone to apple rot bacteria is 8.62 mg / L. The EC50 of any kind of ratio of isopsoralenchalcone against apple rot pathogen is higher than 4.51 mg / L of isopsoralenchalcone single agent, and lower than 8.62 mg / L of psoralen dihydroflavone. L, indicating that the mixture of the two improves the activity of psoralen dihydroflavone, but neither has the high antibacterial activity of isopsoralen chalcone single agent

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