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Method for preventing rice sheath blight disease based on barnyard grass seed extract

A rice sheath blight and extract technology, which is applied in the field of prevention and treatment of rice sheath blight based on barnyardgrass seed extracts, can solve the problems such as the decline of the control effect, and achieve the effects of low cost, simple production method, and wide source of raw materials

Inactive Publication Date: 2017-04-26
姚旭
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] However, due to the long-term use of conventional pesticides, the rice sheath blight pathogen has developed resistance, and the resistance continues to increase, and the control effect gradually declines.
At present, there is no precedent for the use of barnyardgrass extracts in the control of rice sheath blight at home and abroad.

Method used

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  • Method for preventing rice sheath blight disease based on barnyard grass seed extract

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method of barnyardgrass tissue extract extract, the specific steps are as follows:

[0033] Step 1: Decompose barnyard grass into roots, stems, leaves and seeds, place them in an oven at 40°C for 5 hours, and crush them with a plant grinder;

[0034] Second step: soak the pulverized thing of the root, stem, leaf and seed of Barnyard Grass with organic solvent respectively, and described organic solvent is normal hexane; Described soaking divides and carries out, and each soaking time is 5 hours, and soaking temperature is 40°C; filter and remove residue to obtain an extract with a mass concentration of 0.05g / mL;

[0035] Step 3: Concentrate the filtered extract under reduced pressure at a temperature of 40°C to obtain Barnyard Grass Root Extract, Barnyard Grass Stem Extract, Barnyard Grass Leaf Extract and Barnyard Grass Seed Extract extract.

Embodiment 2

[0037] A preparation method of barnyardgrass tissue extract extract, the specific steps are as follows:

[0038] Step 1: Decompose barnyard grass into roots, stems, leaves and seeds, dry them in an oven at 60°C for 12 hours, and crush them with a plant grinder;

[0039] Second step: Soak the pulverized matter of the roots, stems, leaves and seeds of Barnyard Grass with an organic solvent respectively, and the organic solvent is toluene; °C; filter and remove residue to obtain an extract with a mass concentration of 0.10 g / mL;

[0040] Step 3: Concentrate the filtered extract under reduced pressure at a temperature of 60°C to obtain Barnyard Grass Root Extract, Barnyard Grass Stem Extract, Barnyard Grass Leaf Extract and Barnyard Grass Seed Extract extract.

Embodiment 3

[0042] A preparation method of barnyardgrass tissue extract extract, the specific steps are as follows:

[0043] Step 1: decompose barnyard grass into roots, stems, leaves and seeds, place them in an oven at 50°C for 8 hours, and crush them with a plant grinder;

[0044] Second step: Soak the pulverized matter of the roots, stems, leaves and seeds of Barnyard Grass with an organic solvent respectively, and the organic solvent is methanol; °C; filter and remove residue to obtain an extract with a mass concentration of 0.08g / mL;

[0045] Step 3: Concentrate the filtered extract under reduced pressure at a temperature of 50°C to obtain Barnyard Grass Root Extract, Barnyard Grass Stem Extract, Barnyard Grass Leaf Extract and Barnyard Grass Seed Extract extract.

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Abstract

The invention discloses a method for preventing a rice sheath blight disease based on a barnyard grass seed extract. A clear water diluent with the mass fraction being ranged from 0.1 percent to 5 percent of the barnyard grass seed extract is sprayed for the first time during the early stage of the rice sheath blight disease, and is sprayed for the second time after 6 to 8 days. The invention discovers the method for preventing the rice sheath blight disease based on the barnyard grass seed extract through spore suppression experiments of clear water diluents of extracts of different organs of barnyard grasses on pathogenic bacteria conidiospores of the rice sheath blight disease; according to the method, the pathogenic bacteria conidiospores of the rice sheath blight disease is suppressed through the clear water diluent of the barnyard grass seed extract, so that the breeding of the pathogenic bacteria of the rice sheath blight disease is suppressed, a pathogen infection base of the rice sheath blight disease is reduced, and the aim of preventing the disease is achieved; and the method provided by the invention is more natural and environmental-friendly, wide in raw material sources, simple in manufacturing method and low in cost.

Description

technical field [0001] The invention relates to the field of plant disease prevention and control, specifically a method for preventing and treating rice sheath blight based on barnyardgrass seed extract. Background technique [0002] Barnyardgrass is an annual herbaceous plant, barnyardgrass and rice are very similar in shape. Barnyardgrass grows in rice fields, swamps, ditches, and low-lying wastelands. The shape is like rice but the leaves are hairy and light in color. Barnyardgrass and rice together absorb nutrients in the rice field, so barnyardgrass is a vicious weed. [0003] Barnyardgrass has strong adaptability, luxuriant growth, good quality, high forage grass and seed yield, high nutritional value, crude protein content is 6.282-9.419%, and crude fat content is 1.921-2.45%. Fresh grass is the favorite of horses, cattle, and sheep; grass carp raised with barnyard grass grows fast and the meat tastes very delicious; hay is the favorite of cattle. Grains can be u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G13/00A01N65/44A01P3/00
CPCA01G13/00A01N65/00A01N65/44A01N2300/00
Inventor 姚旭
Owner 姚旭
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