Jerusalem artichoke blade phenolic extract, as well as preparation method and application thereof

Abstract

The invention relates to a jerusalem artichoke blade phenolic extract, as well a preparation method and application of the jerusalem artichoke blade phenolic extract. The preparation method comprises the following steps of: drying fresh jerusalem artichoke blades, and crushing the fresh jerusalem artichoke blades to obtain dry powder of the jerusalem artichoke blades; putting the dry powder of the jerusalem artichoke blades into a decompression reflux extraction device, adding de-ionized water, extracting at room temperature to obtain a water phenolic extract, and concentrating or drying the water phenolic extract; or, adding an organic solvent into the decompression reflux extraction device, extracting while refluxing or decompressing and refluxing, and concentrating or drying to obtain an organic solvent phenolic extract; and extracting the water phenolic extract of the jerusalem artichoke blades or the organic solvent phenolic extract by using petroleum ether, chloroform, ethyl acetate and n-butyl alcohol respectively in turn according to the volume ratio in a stepwise manner, and finally, concentrating and drying to obtain the stepwise phenolic extract. The extract disclosed by the invention belongs to the novel plant-source (vegetative) pesticide, has specially good effects on a plurality of plant pathogenic bacteria, such as botrytis cinerea, phytophthora capsici leonian, colletotrichum gloeosporioides, rhizoctonia cerealis and gaeumannomyces graminis, and also can be used as a natural plant-source fungicide and a preservation preservative of fruits and vegetables.

Description

technical field [0001] The invention belongs to the field of plant pesticides, and specifically relates to a class of plant extracts and their preparation methods and applications, in particular to Jerusalem artichoke leaf extracts, their preparation methods and their application as fungicides and preservatives in plant disease control. Background technique [0002] With the continuous development of human society and the further deepening of human cognition, the prevention and control of harmful organisms, overcoming their resistance, ensuring food safety and protecting the environment have received more and more widespread attention. In the field of agriculture, the abuse of chemically synthesized pesticides and their own shortcomings are the main factors that lead to resistance of diseases and insect pests, excessive pesticide residues in agricultural products and damage to the ecological environment. In order to solve these practical problems, people have intensified the...

AI Technical Summary

Problems solved by technology

And it can be beaten by frost and resist various diseases, and the characteristics of not needing to use pesticides are easily overlooked by people. Therefore, the research on the components in its plants to inhibit pathogenic bacteria is still blank at home and abroad.

The present invention is based on the research on antibacterial activity of chemical substances in Jerusalem artichoke leaves, using phenolic chemical substances in Jerusalem artichoke leaves to develop botanical fungicides and fruit and vegetable fresh-keeping agents, which is the first case at home and abroad

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