Plant extract is a product formed from plants as raw materials, through physical and chemical extraction and separation process according to the needs of the use of the final product extracted, to obtain and concentrate one or more active components in plants in a directional way, without changing the structure of the active components.
Proportional extract is the extract, liquid extract or powder made by the extraction and concentration of raw materials such as plants and animals. The number of raw materials before extraction and the mathematical ratio of the product after extraction and concentration generally do not have very clear composition and content.
1. According to the content of active ingredients, it can be divided into three types: effective monomer extract, standard extract and ratio extract;
2. Divided into glycosides, acids, polyphenols, polysaccharides, terpenoids, flavonoids, alkaloids, etc.
3. According to the product form, it can be divided into vegetable oil, extract, powder, lens, etc.
4. According to their use, plant extracts can be divided into natural pigment products, traditional Chinese medicine extracts, extract products and concentrated products.
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After continuous rain, pay attention to the control of apple brown spot
After the rainy season, a systemic fungicide was sprayed immediately to inhibit the further expansion of pathogenic bacteria that had invaded the host leaves, and to prevent the manifest disease and sporulation. After 5-7 days of spraying the systemic fungicide, Bordeaux's solution was applied once more. The systemic therapeutic agent may be selected from fluorosiliconazole, tebuconazole, propiconazole, prochloraz, and other active ingredients, such as Fuxing and tebuconazole, etc., and sprayed at the manufacturer's recommended dosage. In order to improve the adhesiveness of the drug, it is recommended to use a multi-step Bordeaux mixture with a ratio of: copper sulfate: quicklime: water = 1:2-3:200-240.