A kind of biological control method of rice blast

A technology of rice blast and extract, which is applied in the field of biological control of rice blast, can solve the problems such as the decline of control effect, and achieve the effects of low cost, reduced infection base, and wide source of raw materials

Active Publication Date: 2017-12-22
江西兴安种业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, due to the long-term use of conventional pesticides, the rice blast pathogen has developed resistance, and the resistance continues to increase, and the control effect is gradually declining.
At present, there is no precedent of water hyacinth extract being used in the control of rice blast at home and abroad

Method used

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  • A kind of biological control method of rice blast

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Experimental program
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Effect test

Embodiment 1

[0029] A preparation method of water hyacinth tissue extract extract, the specific steps are as follows:

[0030] Step 1: Decompose the water hyacinth into roots, stems, leaves, flowers and seeds, dry them in an oven at 40°C for 5 hours, and crush them with a plant grinder;

[0031] Second step: Soak the pulverized objects of roots, stems, leaves, flowers and seeds of water hyacinth with organic solvent respectively, and the organic solvent is n-hexane; The temperature is 40°C; the slag is removed by filtration to obtain an extract with a mass concentration of 0.05g / mL;

[0032] Step 3: Concentrate the filtered extract under reduced pressure at a temperature of 40°C to obtain water hyacinth root extract, water hyacinth stem extract, water hyacinth leaf extract, and water hyacinth flower extract respectively. extract and water hyacinth seed extract.

Embodiment 2

[0034] A preparation method of water hyacinth tissue extract extract, the specific steps are as follows:

[0035] Step 1: Decompose the water hyacinth into roots, stems, leaves, flowers and seeds, dry them in an oven at 60°C for 12 hours, and crush them with a plant grinder;

[0036] Second step: Soak the pulverized objects of roots, stems, leaves, flowers and seeds of water hyacinth respectively in an organic solvent, the organic solvent being ethyl acetate; the soaking is carried out in 5 minutes, each soaking time is 8 hours, The soaking temperature is 60°C; filter and remove the slag to obtain an extract with a mass concentration of 0.10g / mL;

[0037] Step 3: Concentrate the filtered extract under reduced pressure at a temperature of 60°C to obtain water hyacinth root extract extract, water hyacinth stem extract extract, water hyacinth leaf extract extract, water hyacinth flower extract extract and water hyacinth seed extract.

Embodiment 3

[0039] A preparation method of water hyacinth tissue extract extract, the specific steps are as follows:

[0040] Step 1: Decompose the water hyacinth into roots, stems, leaves, flowers and seeds, dry them in an oven at 50°C for 8 hours, and crush them with a plant grinder;

[0041] Second step: Soak the root, stem, leaf, flower and seed of water hyacinth with organic solvent respectively, and the organic solvent is ethanol; The soaking is divided into 4, and the soaking time is 7 hours each time. at 50°C; remove the slag by filtration to obtain an extract with a mass concentration of 0.08g / mL;

[0042] Step 3: Concentrate the filtered extract under reduced pressure at a temperature of 50°C to obtain water hyacinth root extract, water hyacinth stem extract, water hyacinth leaf extract, and water hyacinth flower extract respectively. extract and water hyacinth seed extract.

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Abstract

The invention discloses a method for biological control of rice blast. In the initial stage of rice blast, spraying a clear water dilution of water hyacinth root extract with a mass fraction of 0.1%-5% once, 6-8 days later Just spray it again. The present invention finds a biological control method for preventing and treating rice blast through the antisporulation experiment of the clear water dilution of extracts of different organs of water hyacinth to the conidia of rice blast pathogenic bacteria; The clear water dilution of the ointment inhibits the conidia of the rice blast pathogen, thereby inhibiting the reproduction of the rice blast pathogen, reducing the infection base of the rice blast pathogen, and achieving the purpose of preventing and curing diseases; the invention is more natural and environmentally friendly, and has a wide range of raw materials. The preparation method is simple and the cost is low.

Description

technical field [0001] The invention relates to the field of plant disease prevention and control, in particular to a method for biological control of rice blast. Background technique [0002] Water hyacinth (Water Hyacinth) scientific name: water hyacinth, belongs to Hyacinthaceae, Hyacinth genus. The stems and leaves of water hyacinth hang over the water, and the tillers prostrate on the water surface. The flowers are multi-edged and trumpet-shaped, and the flowers are gorgeous and beautiful. The leaves are emerald green and darker. The leaves are entire, smooth and textured. With well-developed fibrous roots, fast tillering and reproduction, and extensive management, it is a good plant for beautifying the environment and purifying water. In the suitable growth area, water hyacinth reproduces extremely fast, often due to over-breeding, it consumes a large amount of dissolved oxygen during growth, suffocates fish, and has almost become synonymous with "pollution". [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N65/40A01P3/00
Inventor 何强生
Owner 江西兴安种业有限公司
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