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Plant source pesticide for inhibiting rice blast and application thereof in aspect for inhibiting rice blast

A plant-derived pesticide and rice blast technology, which is applied in the field of rice blast botanical-derived pesticides, can solve problems such as unseen Chinese Sophora japonica, and achieve the effects of improving drug efficacy, simple production process, and reducing toxic and side effects.

Inactive Publication Date: 2009-08-12
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] But there is no report that the leaf and stem extract of Sophora japonica is effective against rice blast

Method used

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  • Plant source pesticide for inhibiting rice blast and application thereof in aspect for inhibiting rice blast
  • Plant source pesticide for inhibiting rice blast and application thereof in aspect for inhibiting rice blast
  • Plant source pesticide for inhibiting rice blast and application thereof in aspect for inhibiting rice blast

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Raw materials: fresh wild or cultivated Sophora japonica plant. Organic solvent: n-hexane (technical grade). Emulsifier: Tween-80.

[0025] Squeeze the tissue of Sophora japonica leaves and stem 100kg with a juice extractor. Take the slag and put it into the extraction kettle, add 200kg of n-hexane, soak and extract at room temperature for 20 hours, and extract in this way for 3 times; after concentrating the extract under reduced pressure below 50°C, 1.5kg of solid concentrate is obtained, and then add 1.0 kg of n-hexane was dissolved under heating and stirring, then 0.15 kg of Tween-80 was added, fully stirred, and then water was added to 30 kg to obtain a 5% aqueous emulsion of plant-derived pesticides for inhibiting rice blast.

Embodiment 2

[0027] Raw materials: fresh wild or cultivated Sophora japonica plant. Organic solvent: n-hexane (technical grade). Emulsifier: Tween-60.

[0028] Squeeze 100kg of Sophora japonica leaves and stems with a juicer, put the residue into an extraction kettle, add 250kg of n-hexane, soak and extract at room temperature for 24 hours, and extract twice in this way; keep the extract below 50°C After concentrating under reduced pressure at high temperature, 1.0kg of solid concentrate was obtained, then 1.0kg of n-hexane was added, and after dissolving under heating and stirring in a water bath, 0.1kg of Tween-60 was added, fully stirred, and then water was added to 10kg to obtain 10 % inhibition of rice blast botanical pesticide aqueous emulsion.

Embodiment 3

[0030] Raw materials: fresh wild or cultivated Sophora japonica plant. Organic solvent: n-hexane (technical grade). Emulsifier: Tween-60.

[0031] Squeeze 100kg of Sophora japonica leaves and stems with a juicer, put the residue into an extraction kettle, add 250kg of n-hexane, soak and extract at room temperature for 24 hours, and extract twice in this way; keep the extract below 50°C After concentrating under reduced pressure at high temperature, 1.0kg of solid concentrate was obtained, then 1.0kg of n-hexane was added, and after dissolving under heating and stirring in a water bath, 0.1kg of Tween-60 was added, stirred thoroughly, and then water was added to 20kg to obtain 5.0 % inhibition of rice blast botanical pesticide aqueous emulsion.

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Abstract

The present invention discloses a plant pesticide which restrains the rice blast and the application of the plant pesticide for restraining rice blast. The plant pesticide is a low-toxicity and high-efficient novel biological product which is developed by using the plant of Chinese scholar tree as raw material. The pesticide is applied with a mode of foliage spray and can be applied to the agricultural field. The plant pesticide for restraining the rice blast according to the invention is obtained through the following steps: using the Chinese scholar tree as raw material, putting the raw material into an extraction kettle after breaking the tissue of raw material, adding the organic solvent with the weight of 2-3 times of the weight of raw material, immersing and extracting for 12-24 hours in the condition of room temperature, extracting for 2-3 times; condensing the extracted liquid to solid-state concentrate; dissolving the solid-state concentrate into the organic solvent with the weight of 0.5-1.5 times of the weight of solid-state concentrate, adding the emulsifying agent with the weight of 0.1-0.15 times of the weight of solid-state concentrate, sufficiently mixing, adding the water with the weight of 20-40 times of the weight of solid-state concentrate, and the plant pesticide aqueous emulsion for restraining rice blast is prepared. The plant pesticide aqueous emulsion for restraining rice blast can effectively restrain the magnaporthe grisea, increases the quality of arable farming and strengthens the capability of crop for resisting disasters and pests.

Description

technical field [0001] The present invention relates to a plant source pesticide (temporary name) for suppressing rice blast, which is a low-toxic, high-efficiency new biological product developed from Sophora japonicaLinn plant as raw material, and sprayed on the leaves , applied to rice, can inhibit rice blast fungus, no residual pollution, broad application prospects. In line with the direction of pesticide development, it has the characteristics of advanced, practical, popularizable and environmentally friendly products for new product development, which is of great significance for the development of organic agriculture and green agriculture. Background technique [0002] Rice blast disease is one of the major obstacles to rice production in southern China. At present, the medicaments used for the prevention and control of rice blast disease in my country are all chemical agents. The commonly used ones are Daowenjing, Kewensan, triazole ring, isidaowenjing, and kasugam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N65/20A01N25/04A01P3/00A01P21/00
Inventor 高桂枝陈敏东郑有飞
Owner NANJING UNIV OF INFORMATION SCI & TECH
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