A botanical fungicide against cabbage soft rot

Abstract

The invention provides a botanical bactericide for resisting Chinese cabbage soft rot disease pathogens. The bactericide is prepared by using Polygonum orientale L. volatile oil as a main material andadding ethanol, tween-20 and water and the Polygonum orientale L. volatile oil is prepared through Polygonum orientale L. crushing, sieving, water soaking and steam distillation process extraction. The bactericide has the characteristics of simple preparation method and low cost. The bactericide has a significant sterilizing effect on Erwinia carotovora (Chinese cabbage soft rot disease pathogens) caused by the Chinese cabbage soft rot disease. The bactericide can well prevent and treat the Chinese cabbage soft rot disease after being sprayed on Chinese cabbage, has the advantages of good dispersibility, good stability, no pollution to the environment, and no residual, also has the effects of green manure, and is an ideal botanical bactericide.

Description

technical field

[0001] The invention relates to a botanical fungicide, in particular to a botanical fungicide for resisting Chinese cabbage soft rot fungus, which uses Polygonum rubra volatile oil as a main raw material. Background technique

[0002] Chinese cabbage is the main vegetable in winter and spring in Northeast China and North China. Cabbage soft rot, commonly known as rotten lump and rot disease, is a devastating disease in Chinese cabbage production. The yield loss is generally 5% to 20%, and severe plots even fail. Cabbage soft rot is caused by Erwinia carotovora (cabbage soft rot) through Chinese cabbage wounds, or spread by rain or insects. After the infection, the Chinese cabbage will rot. In the later period, the infected and rotten Chinese cabbage diseased leaves lose water and become dry, and stick to the leaf ball in the form of translucent thin paper. Finally, the whole cabbage softens, rots, and emits a foul smell. In addition, in addition to the fiel...

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