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A kind of biological control method of rice sheath blight

A rice sheath blight and seed technology, applied in the field of biological control of rice sheath blight, can solve problems such as the decline of control effect, achieve the effects of low cost, inhibit reproduction, and reduce the infection base

Active Publication Date: 2017-12-05
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] 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 of water hyacinth extract being used in the control of rice sheath blight at home and abroad.

Method used

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  • A kind of biological control method of rice sheath blight

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A preparation method of water hyacinth tissue extract extract, the specific steps are as follows:

[0034] 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;

[0035] 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;

[0036] 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

[0038] A preparation method of water hyacinth tissue extract extract, the specific steps are as follows:

[0039] 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;

[0040]Second step: Soak the pulverized objects of roots, stems, leaves, flowers and seeds of water hyacinth with an organic solvent respectively, and the organic solvent is toluene; at 60°C; remove the slag by filtration to obtain an extract with a mass concentration of 0.10 g / mL;

[0041] 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

[0043] A preparation method of water hyacinth tissue extract extract, the specific steps are as follows:

[0044] 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;

[0045] Second step: Soak the root, stem, leaf, flower and seed of the water hyacinth with organic solvent respectively, and the organic solvent is methanol; at 50°C; remove the slag by filtration to obtain an extract with a mass concentration of 0.08g / mL;

[0046] 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 biological control method of rice sheath blight. The biological control method comprises the following steps: in the early stage of the rice sheath blight, spraying a clear water diluent, with the mass percentage of 0.1-5%, of a water hyacinth seed extract; after 6-8 days, spraying once again. Through spore inhibiting experiments of the clear water diluents of extracts from different organs of water hyacinth on rice sheath blight pathogen conidiophores, the biological control method for controlling the rice sheath blight is found; in the biological control method, the rice sheath blight pathogen conidiophores are inhibited by the clear water diluent of the water hyacinth seed extract so as to inhibit propagation of the rice sheath blight pathogens and reduce the infection base number of the rice sheath blight pathogens, so that an aim of controlling a disease is achieved; the biological control method is more natural and environment-friendly; the raw material is wide in source; the clear water diluent is simple in preparation 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 biological control of rice sheath blight. 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". ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N65/40A01P3/00
Inventor 梁海霞田保华刘红伟
Owner TAIYUAN UNIV OF TECH
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