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Timely Harvesting, Processing and Application of Pyrethrum Leaves

A technology of timely harvesting and processing methods, applied in the fields of application, botanical equipment and methods, pesticides, etc., can solve problems such as waste of resources, and achieve the effects of reduced production costs, abundant raw materials, and increased quantities

Active Publication Date: 2012-02-22
YUNNAN CHUANGSEN IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The leaves of pyrethrum are basically not used, resulting in a certain waste of resources

Method used

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  • Timely Harvesting, Processing and Application of Pyrethrum Leaves

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Experimental program
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Effect test

Embodiment

[0016] 1. The choice of the timing of harvesting pyrethrum leaves: when the pyrethrum has buds and buds, the pyrethrum leaves are harvested;

[0017] 2. The method of harvesting leaves: Pick or cut off the mature leaves by hand or scissors. It is best to choose leaves with 5-25 cm long pyrethrum leaves for picking. If it is planted on a large scale, it can also be harvested mechanically, only the leaves are harvested but not the flowers.

[0018] 3. Processing of pyrethrum leaves: After the pyrethrum leaves are harvested, dry or dry them on the clean ground in time to keep the moisture content below 10%;

[0019] 4. Crushing and extraction: Pyrethrum leaves are dried and crushed to 20-60 meshes, and pyrethrins can be obtained by using the same extraction and separation method as that of dried pyrethrum flowers. Such as carbon dioxide supercritical extraction, solvent extraction, ultrasonic solvent extraction, subcritical extraction and other methods.

[0020] 5. Use the extr...

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Abstract

The invention discloses a method for timely collecting and processing pyrethrum leaves. The method comprises the following steps of: collecting the pyrethrum leaves when the flower bud of the pyrethrum opens; picking or shearing ripe leaves by using a hand or a scissor, selecting the leaves with length of 5-25 cm to pick; after the pyrethrum leaves are collected, timely drying or baking on a clean ground to enable the water content of the leaves is less than 10%; drying the pyrethrum leaves, pulverizing to 20-60 meshes, and carrying out carbon dioxide supercritical extraction, or solvent extraction, or ultrasonic solvent extraction, or subcritical extraction to obtain the pyrethrin. The invention ends the history of discarding the pyrethrum leaves so that the materials of the obtained pyrethrin are more abundant; after the ripe leaves are collected, the content of the pyrethrin can not be affected, and the number of the pyrethrum flowers can be increased. By adopting the invention, the natural resource is sufficiently utilized and the production cost of the pyrethrin is greatly lowered.

Description

technical field [0001] The invention relates to timely harvesting, processing and application methods of pyrethrum leaves. Background technique [0002] Pyrethrum is a perennial herb of Compositae, and its flowers contain high insecticidal active ingredient pyrethrin. Previous research literatures all believed that pyrethrins were distributed in glands, and that pyrethrins were only found in flowers. Therefore, for more than one hundred years, people have only used it for picking flowers. The leaves of pyrethrum are basically not used, causing a certain waste of resources. Contents of the invention [0003] The object of the present invention is to provide a method for timely harvesting, processing and application of pyrethrum leaves. [0004] After years of research, the present invention finds that pyrethrins are distributed in the cells, and the whole plant contains pyrethrins. Among them, the content of flowers and leaves is relatively high, which has the value of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01D45/00A01N65/12A01P7/04
CPCY02A50/30
Inventor 王登记罗怀仲王维维
Owner YUNNAN CHUANGSEN IND CO LTD