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Preparation method of plant extracts for inducing tobacco to generate resistance to powdery mildew

A technology of plant extracts and ginger extracts, which is applied in the direction of chemicals, biocides, plant growth regulators, etc. for biological control, can solve the problem of insufficient resistance activity and improve the induced resistance to powdery mildew Active effect, cost saving, effect of less dosage

Inactive Publication Date: 2016-12-07
DEQING LONGXI AGRI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The prior art has disclosed the anti-powdery mildew activity induced by a red onion extract on tobacco plants, but the effect of inducing resistance activity by this method is not good enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method for inducing tobacco to produce a plant extract resistant to powdery mildew, characterized in that the steps are as follows:

[0022] (1) Preparation of ginger extract: Dry the ginger, crush it, extract it twice with methanol at a ratio of 1:5, filter, and concentrate the filtrate under reduced pressure with a rotary evaporator below 30°C to obtain an extract, and store it at low temperature for later use;

[0023] (2) The preparation of the extract of Sapindus chinensis, dry Sapindus chinensis, crush, extract three times with water at a ratio of 1:5, filter, and concentrate the filtrate under reduced pressure with a rotary evaporator below 30°C to obtain an extract, and store it at low temperature spare;

[0024] (3) Preparation of sea coconut extract: Dry the sea coconut, crush it, extract it three times with ethanol at a ratio of 1:3, filter, and concentrate the filtrate under reduced pressure with a rotary evaporator below 30°C to obtain the ext...

Embodiment 2

[0030] A preparation method for inducing tobacco to produce a plant extract resistant to powdery mildew, characterized in that the steps are as follows:

[0031] (1) Preparation of ginger extract: Dry the ginger, crush it, extract it twice with methanol at a ratio of 1:5, filter, and concentrate the filtrate under reduced pressure with a rotary evaporator below 30°C to obtain an extract, and store it at low temperature for later use;

[0032] (2) The preparation of the extract of Sapindus chinensis, dry Sapindus chinensis, crush, extract three times with water at a ratio of 1:5, filter, and concentrate the filtrate under reduced pressure with a rotary evaporator below 30°C to obtain an extract, and store it at low temperature spare;

[0033] (3) Preparation of sea coconut extract: Dry the sea coconut, crush it, extract it three times with ethanol at a ratio of 1:3, filter, and concentrate the filtrate under reduced pressure with a rotary evaporator below 30°C to obtain the ext...

Embodiment 3

[0039] A preparation method for inducing tobacco to produce a plant extract resistant to powdery mildew, characterized in that the steps are as follows:

[0040] (1) Preparation of ginger extract: Dry the ginger, crush it, extract it twice with methanol at a ratio of 1:5, filter, and concentrate the filtrate under reduced pressure with a rotary evaporator below 30°C to obtain an extract, and store it at low temperature for later use;

[0041] (2) The preparation of the extract of Sapindus chinensis, dry Sapindus chinensis, crush, extract three times with water at a ratio of 1:5, filter, and concentrate the filtrate under reduced pressure with a rotary evaporator below 30°C to obtain an extract, and store it at low temperature spare;

[0042] (3) Preparation of sea coconut extract: Dry the sea coconut, crush it, extract it three times with ethanol at a ratio of 1:3, filter, and concentrate the filtrate under reduced pressure with a rotary evaporator below 30°C to obtain the ext...

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PUM

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Abstract

The invention discloses a preparation method of plant extracts for inducing tobacco to generate resistance to powdery mildew. The preparation method comprises the steps that 1, a fresh ginger extract is prepared; 2, a Chinese soapberry fruit extract is prepared; 3, a lodoicea maldivica extract is prepared; 4, a ficus tikoua extract is prepared; 5, 5-10 parts of fresh ginger extract, 3-5 parts of Chinese soapberry fruit extract, 2-3 parts of lodoicea maldivica extract, 3-5 parts of ficus tikoua extract and 120 parts of purified water are taken by weight to be mixed, and then the plant extracts for inducing the tobacco to generate the resistance to the powdery mildew are obtained. A using method of the plant extracts comprises the steps that the plant extracts are sprayed to tobacco plants with 13 leaves in a field through a sprayer, then the resistance inducing effect is investigated after ten days, and the resistance activity inducing effect is 70.2% to 92.3%.

Description

technical field [0001] The invention belongs to the technical field of green ecological prevention and control of plant diseases and insect pests, in particular a plant extract used to induce tobacco to produce resistance to powdery mildew. Background technique [0002] Tobacco powdery mildew is commonly known as "upper gray", "lower frost" and "upper nitrate". The disease mostly damages mature old leaves and develops from bottom to top. Leaf disease, first is a small round yellow-brown spot, then white powdery dots appear on the back spot, making the spot a carpet, the spot expands, the white powder covers the whole leaf, the diseased leaf turns green and brown first, and then dead. When it is serious, it will damage the tender stems, and the diseased stems will also be covered with white powder. After baking, the diseased leaves are as thin as paper, dark and rusty brown in color, and lose their economic value. It occurs in various smoking areas in China, and the most ...

Claims

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Application Information

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IPC IPC(8): A01N65/48A01P3/00
CPCA01N65/00A01N65/48A01N2300/00
Inventor 房春华
Owner DEQING LONGXI AGRI TECH
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