Cephalotaxus sinensis Li. insecticide and its preparation method

An insecticide and torreya technology, which is applied in the field of pesticides, can solve the problems of unexplored system insecticidal effect, failure to apply agricultural production, and failure to form products, and achieves simple manufacturing method, low cost and high insecticidal effect. Effect

Active Publication Date: 2013-06-12
NORTHWEST A & F UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these are the results of laboratory measurements, and no systematic research on insecticidal effects has been seen so far, and no products have been formed, and they have not been applied to agricultural production.

Method used

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  • Cephalotaxus sinensis Li. insecticide and its preparation method
  • Cephalotaxus sinensis Li. insecticide and its preparation method
  • Cephalotaxus sinensis Li. insecticide and its preparation method

Examples

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preparation example Construction

[0030] The preparation method of Chinese crude torreya insecticide is:

[0031] A. Obtaining Chinese Torreya Torreya Extract

[0032] Mix the branches and leaves of Torreya chinensis with the seeds, and pulverize them to a coarse pulverization of 1 mm to 5 mm with a plant tissue grinder. The obtained coarse pulverized material is leached by a conventional solvent method, the solvent used is ethanol, ethyl acetate, chloroform, petroleum ether, any one or more of them in water, the extraction temperature is 50-80 ° C, and the extraction time is 6 ~12 hours to obtain the extract, which is vacuum concentrated to the equivalent of 1kg of dry powder / kg of concentrate, that is, the Chinese crude Torreya extract.

[0033] B. Preparation of wettable powder and microemulsion

[0034] Chinese Torreya chinensis extract is formulated with solvents or fillers and surfactants into microemulsions and wettable powders for pest control (Plutella xylostella).

[0035] The mass percent of each r...

Embodiment 1

[0041] Embodiment 1: Preparation of 65% Chinese Torreya wettable powder

[0042] Add 25kg of filler white carbon black into the conical mixer, spray 65kg of Chinese Torreya chinensis concentrate into the mixer through a high-pressure nozzle, and mix well; then add 7kg of sodium lignosulfonate and 3kg of polyoxyethylene lauryl ether, Mix well and evenly to get 65% Chinese Torreya wettable powder. The water dispersibility, diluent stability, and cold and hot storage stability of the preparation meet the requirements of commercial pesticide preparations.

Embodiment 2

[0043] Embodiment 2: the preparation of 20% thick Chinese Torreya microemulsion

[0044] Weigh 20kg of Chinese crude torreya concentrate, dissolve it in 30kg of ethyl acetate, then add 15kg of calcium dodecylbenzenesulfonate and 5kg of styrene acid polyoxyethylene ether, mix under high-speed stirring, and heat to about 40°C; Add 30 kg of deionized water dropwise under high-speed stirring, control the rate of addition of water, and keep the temperature at about 40 ° C; after the addition of water, the temperature is raised to 50 ° C, stirred for 1 hour, and 100 kg of 20% Chinese Torreya microemulsion is obtained. The stability and appearance of the preparation meet the requirements of commercial preparations.

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Abstract

The invention discloses a Cephalotaxus sinensis Li. insecticide and its preparation method. The Cephalotaxus sinensis Li. insecticide is made by taking a Cephalotaxus sinensis Li. extract as a main component and adding additives. The preparation can be in the form of wettable powder and a microemulsion, and is mainly used for the prevention and treatment of Mythimna separata and Plutella xylostella. The Cephalotaxus sinensis Li. Insecticide provided in the invention not only good insecticidal effects, but is also safe to the environment, human, livestock, natural enemies of pests and other beneficial organisms, and pests do not produce resistance to the insecticide. With a simple preparation process and a low cost, the Cephalotaxus sinensis Li. insecticide is suitable for the popularization and application.

Description

technical field [0001] The invention belongs to the technical field of pesticides, and specifically relates to a pesticide and its preparation, in particular to an insecticide prepared by using the Chinese Torreya sinensis plant as a raw material and a method thereof. Background technique [0002] Compared with traditional chemical pesticides, botanical pesticides have the advantages of easy availability of raw materials, more action sites, less resistance to pests, easy degradation, low residue, less harm to natural enemies and insects, and environmental safety. Screening highly active substances from natural products, using them as templates to synthesize new chemical pesticides, or directly developing them into natural-source pesticide preparations with high efficiency, low toxicity, low residue, and harmony with the environment has become an important step in the creation of new pesticides. One of the effective ways is the development direction of pesticides in the futur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N65/06A01P7/04
CPCY02A50/30
Inventor 马志卿周一万吴华李雪娇冯俊涛张兴
Owner NORTHWEST A & F UNIV
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