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Preparation and application method of botanical insecticide

A botanical and pesticide technology, applied in the fields of botanical equipment and methods, pesticides, plant growth regulators, etc., can solve the problems of high energy consumption, secondary environmental pollution, etc. The effect of improved efficiency and simple preparation process

Inactive Publication Date: 2008-07-02
HENAN AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used methods for preparing botanical pesticides are: organic solvent extraction, water immersion or cooking, etc. These methods are simple in technology, but the use of a large amount of organic solvents in the extraction process will bring secondary environmental pollution, or the method It consumes a lot of energy

Method used

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  • Preparation and application method of botanical insecticide
  • Preparation and application method of botanical insecticide
  • Preparation and application method of botanical insecticide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Pretreating plant materials (tobacco leaves, Sophora flavescens, Herba baculata, Flos japonica, and Flos damanthus respectively according to the ratio of 1.5: 2.5: 1.5: 0.5: 0.5 by weight, respectively, to obtain the required raw materials.

[0025] 2. Preparation of Insecticidal Active Ingredient A Agent

[0026] Tobacco leaves are taken, and 150g, 50g and 50g of Yangjinhua and Naoyanghua fragments are put into supercritical CO 2 In the extractor of the fluid extraction device, ethanol is added as a carrier agent, and after 3 hours of circular extraction at a pressure of 20 MPa and an extraction temperature of 60 ° C, the extract of plant insecticidal active ingredients is obtained. The extract is filtered and left to stand for 24 hours. After the precipitation is removed, the obtained supernatant is the plant insecticidal active ingredient A agent.

[0027] 3. Preparation of Insecticidal Active Ingredient B Agent

[0028] Take 250g and 150g of Sophora flavescens ...

Embodiment 2

[0035] 1 Preparation of botanical insecticide No. 1

[0036] (1) Plant materials (tobacco leaves, Sophora flavescens, Herba baculata, Flos japonica, and Flos daturae) are respectively pretreated according to the ratio of 2:2:1:1:1 by weight to obtain the required raw materials.

[0037] (2) Preparation of Insecticidal Active Ingredient A Agent

[0038] Tobacco leaves are taken, and 200g, 100g and 100g of Yangjinhua and Naoyanghua fragments are put into supercritical CO 2 In the extractor of the fluid extraction device, ethanol is added as a carrier agent, and after 2 hours of circular extraction at a pressure of 30 MPa and an extraction temperature of 40 ° C, the extract of plant insecticidal active ingredients is obtained. The extract is filtered and left to stand for 24 hours. After the precipitation is removed, the obtained supernatant is the plant insecticidal active ingredient A agent.

[0039] (3) preparation of insecticidal active ingredient B agent

[0040] Take 200...

Embodiment 3

[0070] Get No. 1 stock solution of botanical insecticide prepared in Example 2, add 5% cypermethrin by 1 / 6 of the volume of the stock solution to prepare compound insecticide.

[0071] With the support of Yuzhou Tobacco Company, the applicant conducted a field experiment in the tobacco field of Yanlou Village, Guolian Township, Yuzhou City. The results showed that the 500-fold control effect on tobacco budworm was similar to that of local chemical pesticides, but the effect period was longer. The control effect on tobacco aphids is better than that of local commonly used chemical pesticides (Table 4 and Table 5).

[0072] Table 4 Investigation and statistics of the experiment on preventing and controlling budworm

[0073]

[0074] Table 5 Records and questionnaires for controlling aphids

[0075]

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Abstract

The invention discloses a method for preparing and using a vegetable insecticide. A supercritical CO2 liquid is utilized to extract and prepare active ingredient A agent for vegetable insecticide and a dipping method is utilized to prepare an active ingredient B agent for vegetable insecticide. The A agent and the B agent form the vegetable insecticide which is applied to control crop pests. The invention has the advantages that : 1, the invention has easily acquired materials, low mammalian toxicity, security and economy and no waste water and gas generated in the whole preparing technique flow, and the waste slag can be mixed with other fertilizers to be retted into a compound fertilizer; 2, the invention has simple preparing technique, thus being beneficial to industrial production; 3, the invention consists of various effective active insecticidal ingredients and the ingredients lead the pests hard to adapt and generate drug fastness and the drug effect is remarkable through field test; 4,the insecticide acquired by the invention can be matched with chemical pesticides for use according to a certain proportion and the drug effect is remarkably improved; 5, the insecticide acquired by the invention is stable and the effective usage period can be 2 years.

Description

technical field [0001] The present invention belongs to the preparation and use method of insecticide, especially relates to a kind of supercritical CO 2 Fluid extraction and common organic solvent extraction of plant insecticide components, preparation of plant insecticides and methods of use. Background technique [0002] Extensive use of chemical pesticides not only causes environmental pollution, destroys ecological security, endangers human health, but also reduces the immunity of crops themselves. my country is the earliest country to use insecticidal plants. At present, the commonly used methods for preparing botanical pesticides are: organic solvent extraction, water immersion or cooking, etc. These methods are simple in technology, but the use of a large amount of organic solvents in the extraction process will bring secondary environmental pollution, or the method The energy consumption itself is large. In order to effectively control crop pests and protect huma...

Claims

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Application Information

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IPC IPC(8): A01N65/00A01P7/04
CPCY02A50/30
Inventor 韩富根赵铭钦
Owner HENAN AGRICULTURAL UNIVERSITY
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