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A kind of botanical compound rice stem borer insecticide and preparation method thereof

A technology of insecticide and stem borer, which is applied in the field of plant source compounded stem borer insecticide and its preparation, can solve problems such as environmental pollution and excessive pesticide residues, and achieve simple and effective preparation methods, small environmental hazards, The effect of a wide range of material sources

Active Publication Date: 2021-07-13
HUBEI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of excessive pesticide residues and environmental pollution of chemical pesticides, the present invention provides a plant-derived compound rice stem borer pesticide and a preparation method thereof, so that the prepared pesticide has a significant insecticidal effect and low pesticide residues and less harmful to the environment

Method used

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  • A kind of botanical compound rice stem borer insecticide and preparation method thereof
  • A kind of botanical compound rice stem borer insecticide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The preparation of compound insecticide of the present invention:

[0015] (1) Dried S. chinensis and Licewort respectively in an oven at 55°C to constant weight, then pulverized, passed through a 60-mesh sieve, and set aside;

[0016] (2) Take 50g of the sieve prepared in step (1) and add 10 times the amount of 75% ethanol, then place them in a conical flask for extraction for 48 hours, and then use ultrasonic waves (power 300W, frequency 40kHZ, temperature 40°C) to extract for 30 minutes, The filter residue was repeated three times, and suction filtered to obtain the S. chinensis filtrate and Licetium filtrate, which were set aside;

[0017] (3) Place the filtrate obtained in step (2) on a rotary evaporator to control the temperature at 55°C for distillation under reduced pressure. When no solvent flows out, collect the extract, and dry the extract in an oven at 60°C until constant Heavy, to obtain the extract of Snakevine and Licewort extract for use;

[0018] (4) ...

Embodiment 2

[0024] The preparation of the single compound insecticide of the extract of S. chinensis:

[0025] (1) Collect 1 g of the extract of S. chinensis in Example 1, add 1 g of co-solvent, 98 mL of distilled water, seal it and let it stand at room temperature for 1 hour, and then treat it with ultrasonic waves (power 300W, frequency 59kHZ, temperature 45°C) for 20 minutes;

[0026] (2) After stirring for 15 minutes, the single compound insecticide stock solution of the extract of S. chinensis can be obtained, and the concentration is 10g / L;

[0027] (3) After pre-experiment and under the conditions of saving raw materials and good insecticidal effect, after the stock solution of the single insecticide of S. chinensis extract was diluted 5.3 times, the optimum concentration of 1.88g / L of S. Determination of insect activity can obtain the single compound insecticide of the extract of S. chinensis.

Embodiment 3

[0029] Preparation of lice grass extract single compound insecticide:

[0030] (1)(2) is the same as (1)(2) in embodiment two;

[0031] (3) After pre-experiment and under the conditions of saving raw materials and good insecticidal effect, after diluting 6.6 times of single insecticide stock solution of licewort extract, choose the optimal concentration of 1.52g / L for indoor insecticide. After the activity measurement, the single compound insecticide of the lice grass extract can be obtained.

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Abstract

A plant-derived compound insecticide for Chilo borer, each 1L of the insecticide contains 0.1-1g of S. chinensis extract, 0.1-0.8g of Licetium extract, 10mL of co-solvent, and the balance is distilled water. The insecticide has the advantages that the insecticide can be obtained by using the extract of S. chinensis and the extract of lice grass as the effective components, and then assisting in adding co-solvent and distilled water as the formulation of the insecticide. On the one hand, the compounding method is simple, and only two kinds of plant extracts are needed to achieve the insecticidal effect; on the other hand, the composition raw materials are pure natural medicines, and it is difficult for pests to develop resistance, which is greener and more environmentally friendly than chemical agents.

Description

technical field [0001] The invention belongs to the technical field of biopesticides, and specifically relates to a plant-derived compound rice stem borer insecticide and a preparation method thereof. Background technique [0002] Chilo borer is one of the most important pests that harm rice. Harm to rice at the seedling stage can cause dry sheaths, dead hearts and insect damage to plants. Harm at the booting stage and earing stage can cause dry booting and white ears, etc., seriously affecting rice. quality and yield. At present, chemical agents are mostly used in production to prevent and control Chilo borer. However, the unreasonable use of chemical pesticides has led to the continuous improvement of the resistance of the C. borer and increased the rampant harm of the C. borer. At the same time, problems such as excessive pesticide residues and environmental pollution caused by chemical pesticides have become increasingly prominent. These unfavorable factors have promp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N65/36A01P7/04
CPCA01N65/00A01N65/36A01N65/14
Inventor 何玉池刘香丽王桂友甘露黄宝生张泽武张亚春张宏欣蔡得田宋兆建张献华
Owner HUBEI UNIV
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