Herba andrographitis water aqua for preventing and treating brown rot disease of fruit tree and preparation method thereof

Abstract

The invention discloses a herba andrographitis water aqua for preventing and treating a brown rot disease of a fruit tree and a preparation method thereof. The herba andrographitis water aqua comprises a compound extract of herba andrographitis and radix stemonae as well as caulis lonicerae, tea saponin, an antifreezing agent and a preservative, wherein the extract comprises the following raw materials in mix proportion: 80 to 120 parts of the herba andrographitis, 5 to 40 parts of the radix stemonae, and 5 to 35 parts of the caulis lonicerae. The preparation method of the herba andrographitis water aqua for preventing and treating the brown rot disease of the fruit tree comprises the following steps of (1), mixing the herba andrographitis, the radix stemonae and the caulis lonicerae in proportion, and carrying out microwave water extraction on an obtained mixture, wherein the pH (potential of hydrogen) of the obtained mixture is equal to 6.0 to 8.0, an extraction time is 30 minutes to 45 minutes, the microwave power is 500W, and a temperature is 50 DEG C; extracting the obtained mixture twice, merging extracting solutions, filtering a newly obtained mixture, precipitating a filtrate with alcohol, carrying out vacuum filtration on the alcohol-precipitated filtrate, and concentrating an obtained product to obtain a 0.8g(pharmacognostically) / ml to 2.3g(pharmacognostically) / ml of compound extracting solution; (2), mixing and agitating the compound extracting solution with the tea saponin, the antifreezing agent and the preservative, and adding a 0.5% of sodium carboxymethylcellulose aqueous solution into a finally obtained mixture in a constant-volume manner to obtain the herba andrographitis water aqua. The herba andrographitis water aqua for preventing and treating the brown rot disease of the fruit tree can be used for effectively carrying out sterilization and corrosion prevention, is good in effect, is nontoxic, has no residues, is simple in production technique, and is suitable for industrialized production.

Description

technical field [0001] The invention relates to an andrographis paniculata water agent for preventing and treating brown rot of fruit trees and a preparation method thereof. Background technique [0002] At present, chemical pesticides are an effective means to prevent and treat plant diseases, and play a huge role in ensuring high and stable crop yields. However, the "3R" problem caused by the long-term and large-scale unreasonable use of traditional chemical pesticides, that is, the residue, resistance, and re-emergence is becoming more and more serious, which has aroused widespread concern in the society and poses a huge threat to the environment and human health. It is more and more urgent to seek and develop new pesticides that are safe for human health and ecological environment. Compared with chemical pesticides, biological pesticides are generally considered to have obvious advantages such as no pollution, no pollution, no residue, and less resistance. [0003] Bro...

AI Technical Summary

Problems solved by technology

However, the "3R" problem caused by the long-term and large-scale unreasonable use of traditional chemical pesticides, that is, the residue, resistance, and rampantness is becoming more and more serious, which has aroused widespread concern in the society and poses a huge threat to the environment and human health.