Plant-derived fungicides use certain antibacterial substances contained in some plants or induced plant defense elements to kill or effectively inhibit the growth and development of certain pathogenic bacteria.Antibacterial compounds in plants are a variety of secondary metabolites with antibacterial activity produced by plants, including alkaloids, flavonoids, proteins, organic acids and phenolic compounds and many other types, such as Artemisia serrata Capillin , saponin . It has been reported that 1,389 kinds of plants may be used as pesticides and fungicides.
The results of the study showed that bamboo extracts such as Phyllostachys pubescens, Phyllostachys pubescens, Phyllostachys edulis, Phyllostachys brevifolia and other bamboo extracts showed strong antifungal effects, and the inhibition rate of the hyphae of Fusarium graminearum in 72 hours was above 80%. The screening of 56 kinds of plants for antibacterial activity showed that lettuce, cocklebur, sophora serrata and other plants have strong antibacterial effects. The study on the antibacterial activity of Sophora flavescens extract shows that the ethyl acetate extract of Sophora flavescens has a significant inhibitory effect on a variety of fungi and bacteria, and the diameter of the inhibition zone is 10~42nm.
In addition, it has also been found that many plants have strong antibacterial activity, such as tea seeds, Chinese pepper, certain mangroves and fern plants. Plant-derived antiviral agent. Plant viruses are known as "plant cancers". Now There are more than 1,000 known species, which are very harmful in agriculture, and their degree of damage is second only to fungal diseases. According to statistics, the world's annual losses due to plant virus diseases exceed 15 billion U.S. dollars.
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