Preparation method for agricultural bactericide of plant source

Abstract

The invention relates to a preparation method for the agricultural bactericide of a plant source, and belongs to the technical field of agricultural bactericide. The preparation method comprises the following steps: firstly, taking fruit of cubeb litsea tree as raw materials, breaking and homogenizing the fruit of cubeb litsea tree, adding into deionized water for extraction; carrying out transpiration by vapour to obtain effective substances; standing for layering to obtain the essential oil of the fruit of cubeb litsea tree; extracting bacteriocidal substances of alkylphenolic acids in ginkgo leaves by the deionized water; subsequently, extracting antibacterial substances in cinnamon herba pogostemonis by ethyl alcohol; and finally, carrying out heating stirring on ginkgo leaf extracts, cinnamon extracts, litsea cubeba oil and the like; through a synergistic effect among multiple ingredients, achieving a sterilization purpose to obtain the agricultural bactericide of plant source. The agricultural bactericide prepared with the preparation method has a broad-spectrum inhibition function on various plant pathogenic bacteria, is safe to crops, does not pollute environment and has the advantages of high efficiency and low toxicity, and resistance is unlikely to generate to the agricultural bactericide by the bacteria.

Description

technical field [0001] The invention relates to a preparation method of a plant source agricultural fungicide, belonging to the technical field of agricultural fungicides. Background technique [0002] Botanical fungicides refer to substances with fungicidal activity directly extracted from plants. Although there are not many plant-derived substances that can be used as fungicides, the research is still very deep and extensive. Artemisinin isolated from Artemisia annua plants, stearyl alcohol isolated from Salvia miltiorrhiza, alfalfaic acid present in the root of alfalfa, and pterostilbene in sea red bean all showed strong antifungal activity. Lvdi EC, which is made from active substances extracted and separated from ginkgo trees, has significant bactericidal and bacteriostatic effects on various vegetables, apples, wheat, and cotton, and is a broad-spectrum agricultural fungicide. [0003] Rice blast is one of the most serious rice diseases in the world's rice fields. Th...

AI Technical Summary

Problems solved by technology

[0005] The main technical problems to be solved by the present invention are: aiming at the simplification of current plant resistant varieties, the genetic complexity of physiological races of plant pathogenic bacteria and the diversity of pathogenicity, as well as the toxicity of chemical pesticides and the drug resistance of pathogenic bacteria, resistant varieties The use of chemical pesticides and chemical pesticides is subject to certain restrictions in production, and a preparation method of botanical agricultural fungicides is provided. The present invention first uses Litsea cubeba as a raw material, crushes and homogenizes it, puts it into deionized water and extracts it, and then extracts it in deionized water. The effective substances are evaporated with water vapor, and the litsea cubeba essential oil is obtained after standing for stratification, and the bactericidal substances of alkylphenolic acids in ginkgo biloba are extracted with deionized water, and the antibacterial components in cinnamon patchouli are extracted with ethanol , and finally heat and stir Ginkgo biloba extract, cassia bark extract and Litsea cubeba oil, etc., and achieve the purpose of sterilization through the synergistic effect between multiple components, and obtain a botanical agricultural fungicide. The agricultural fungicide prepared by the present invention is effective for many Plant pathogenic bacteria have a broad-spectrum inhibitory effect, and are safe for crops, do not pollute the environment, have the advantages of high efficiency, low toxicity, and bacteria are not easy to develop resistance to them