Compound schima superba preparation for resisting rice blast and preparation thereof

A technology for resisting rice blast and wood lotus, which is applied in the fields of botanical equipment and methods, biocides, fungicides, etc. The effect of rich material sources and high anti-disease activity

Inactive Publication Date: 2008-07-09
JIANGXI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Rice is the main food crop in my country, and rice blast is the main disease of rice. The main problems are: 1. The rice blast pathogen (Pericularia oryzae) has a long incubation period; 2. There are many diseased parts: seedling blast, leaf blast, leaf pillow blast, Ear blast, branch blast and grain blast, etc.; 3. Wide distribution: it can occur in almost all rice areas; 4. Serious damage: it generally leads to a 10% to 20% reduction in rice production, and the severe one can reach 40% to 50%. , particularly heavy fields or even no harvest
However, botanical pesticides often have disadvantages such as low activity, short duration of efficacy, and high production costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Prepare the leaf powder mixture: wash the leaves of Schima superba and the fruits of Sapindia chinensis respectively, put them in air-dry at room temperature, then weigh 15 kg of leaves of Schima superba and 8 kg of fruits of Sapindia sativa, and crush them into powders, mixing them to obtain a powdery mixture;

[0028] 2. 80% ethanol reflux extraction: put the above powder mixture into a container, then pour 115L of 80% ethanol aqueous solution into the container, reflux extraction at 75°C for 5 hours, filter off the residue, and obtain the extract;

[0029] 3. Organic solvent extraction: extract the extract with petroleum ether equal to the volume of the extract to obtain the first raffinate, and then continue to extract the first raffinate with ethyl acetate equal to the volume of the first raffinate. The raffinate is extracted to obtain the second raffinate;

[0030] 4. Preparation preparation: add 2% alkyl polyoxyethylene ether sulfonate in the amount of the se...

Embodiment 2

[0036] 1. Preparation of leaf powder mixture: wash the Schima superba leaves and the tea leaves separately, put them in air-dry at room temperature, then weigh 15kg of the Schima superba leaves and 20kg of the tea leaves, mix them together, and crush them with a pulverizer into powder to obtain the leaf powder mixture;

[0037] 2. 80% ethanol reflux extraction: put the above-mentioned leaf powder mixture into a container, then pour 175L of 80% ethanol aqueous solution into the container, reflux extraction at 75°C for 4 hours, filter off the residue, and obtain the extract;

[0038] 3. Organic solvent extraction: extract the extract with petroleum ether equal to the volume of the extract to obtain the first raffinate, and then continue to extract the first raffinate with ethyl acetate equal to the volume of the first raffinate. The raffinate is extracted to obtain the second raffinate;

[0039] 4. Preparation preparation: add 2% sodium dodecylsulfonate in the second raffinate ...

Embodiment 3

[0041] 1. Preparation of leaf powder mixture: wash the leaves of Schima superba and tea leaves separately, put them in air-dry at room temperature, then weigh 15kg of leaves of Schima superba and 100kg of tea leaves, mix them together, and crush them with a pulverizer into powder to obtain the leaf powder mixture;

[0042]2. 80% ethanol reflux extraction: put the leaf powder mixture into a container, then pour 80% ethanol aqueous solution into the container at a ratio of 1:5, reflux extraction at 75°C for 8 hours, and filter off the residue , to obtain the extract;

[0043] 3. Organic solvent extraction: extract the extract with petroleum ether equal to the volume of the extract to obtain the first raffinate, and then continue to extract the first raffinate with ethyl acetate equal to the volume of the first raffinate. The raffinate is extracted to obtain the second raffinate;

[0044] 4. Preparation preparation: add 5% alkyl polyoxyethylene ether sulfonate in the amount of ...

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PUM

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Abstract

The invention discloses a compound Schima superba Gardn.et Champ rice blast resistant preparation and a preparation method. The preparation adopts the leaves of Schima superba Gardn.et Champ and synergist (the leaves of Camellia oleifera Abel or the fruit of Sapindus mulorossi Gaertn) as raw materials. After crushing, the leaves of Schima superba Gardn.et Champ and the synergist X are mixed by the weight proportion of 3 portions of the leaves of Schima superba Gardn.et Champ and 4-20 portions of the leaves of Camellia oleifera Abel X or 1.6-40 portions of the fruit of Sapindus mulorossi Gaertn X. The mixture then is extracted by 80% of ethanol. Exacting solution is extracted by petroleum ether, ethyl acetate one after another. Raffinate is made into the preparation by adding pesticide auxiliary agents (alkyl polyoxyethylene ether sulphonates or lauryl sodium sulphonate), wherein the weight ratio of the mixed extraction of the Schima superba Gardn.et Champ leaves and the synergist is 15 percent- 25 percent. The invention has the advantages of strong anti-pathogenic activity to the rise blast, environmental protection, low toxicity, and that pesticide resistance is not easy to be generated, the comprehensive utilization of resources is convenient and the invention is suitable for scale production.

Description

technical field [0001] The invention relates to biological pesticides, in particular to a compound Schima superba anti-rice blast preparation and a preparation method thereof. technical background [0002] Rice is the main food crop in my country, and rice blast is the main disease of rice. The main problems are: 1. The rice blast pathogen (Pericularia oryzae) has a long incubation period; 2. There are many diseased parts: seedling blast, leaf blast, leaf pillow blast, Ear blast, branch blast and grain blast, etc.; 3. Wide distribution: it can occur in almost all rice areas; 4. Serious damage: it generally leads to a 10% to 20% reduction in rice production, and the severe one can reach 40% to 50%. , especially heavy fields or even no harvest. In recent years, rice blast has also shown a trend of frequent occurrence, recurrence and outbreak in our province. At present, the prevention and control of rice blast is mainly based on the selection of high-yield and disease-suppress...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N65/00A01P3/00
Inventor 霍光华詹五根陈明辉李红
Owner JIANGXI AGRICULTURAL UNIVERSITY
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