Application of linalool in prevention and control of plant soil-borne diseases

A soil-borne disease, linalool technology, applied in the field of pesticides, can solve the problems of unstable control effects, pesticide residues, and poor control effects, and achieve good control effects, no pesticide residues, and better effects

Active Publication Date: 2021-08-06
ZUNYI TOBACCO OF GUIZHOU TOBACCO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tobacco black shank and bacterial wilt are caused by these two types of pathogenic bacteria, and the damage is extremely serious, especially in the southern smoking areas of my country, which often occur mixedly and are difficult to control
At present, the control of the above two diseases mainly relies on chemical agents, such as metalaxyl mancozeb, dimethomorph, propamocarb, etc. for the control of tobacco black shank, and the main agent for the control of bacterial wilt is Thiobacillus Copper preparations such as copper and copper hydroxide are very likely to cause pesticide residues, environmental pollution and drug resistance of pathogenic bacteria
At present, there are many microbial pesticides that have been studied, but there are problems such as poor control effect and unstable control effect, and it is difficult to replace chemical pesticides.

Method used

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  • Application of linalool in prevention and control of plant soil-borne diseases
  • Application of linalool in prevention and control of plant soil-borne diseases
  • Application of linalool in prevention and control of plant soil-borne diseases

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preparation example Construction

[0019] The present invention also provides a preparation method of linalool microcapsules for preventing and treating plant soil-borne diseases, comprising the following steps: mixing linalool, β-cyclodextrin and water in a mass ratio of 1:8:8 Stir for 40 minutes, vacuum dry, grind, and collect the part with a particle size less than 200 μm to obtain the linalool microcapsules.

[0020] The temperature of the vacuum drying in the present invention is preferably 70° C., and the time is preferably 12 hours. The linalool microcapsules of the invention use linalool as an active ingredient and β-cyclodextrin as an embedding agent.

[0021] The invention also provides the linalool microcapsules for preventing and controlling plant soil-borne diseases prepared by the above preparation method.

[0022] The mass percent content of linalool in the linalool microcapsules of the present invention is preferably 80±5%.

[0023] The invention provides the linalool microcapsules for prevent...

Embodiment 1

[0028] Preparation of Linalool Microcapsules

[0029] (1) Mix linalool, β-cyclodextrin and water in a mass ratio of 1:8:8, and fully stir for 40 minutes;

[0030] (2) Dry the above sample in a vacuum oven at 70°C for 12 hours;

[0031] (3) Gently grind and sieve the dried product to obtain a fraction smaller than 200 μm to prepare microcapsules with a linalool content of 80±5%.

Embodiment 2

[0033] Inhibitory Effect of Linalool on Tobacco Blackleg

[0034] 1. Measurement method

[0035] 1.1 Linalool plate antibacterial test

[0036] Mycelium growth rate method. Use DMSO (0.5%, v / v) to make linalool into different concentrations of oat medium plates (abbreviated as OA, boil 30g oatmeal with 1000ml water for 20min, filter with 4 layers of gauze, add 17g agar, and sterilize at 121°C for 20min ), the final concentration of linalool was 5, 10, 20, 40, 80, 120 μl / L. Inoculate Phytophthora nicotiana cake (5mm) on OA medium containing different concentrations of chrysanthemum essential oil, culture at 28°C for 5 days, and use the same dilution ratio of DMSO as a control, measure the colony diameter by cross method, and calculate the mycelial growth inhibition rate.

[0037] 1.2 Determination of fumigation effect

[0038] The fumigation activity of linalool against Phytophthora nicotiana was determined by the sealed plate buckle method. Phytophthora nicotiana cakes wi...

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Abstract

The invention provides application of linalool in prevention and control of plant soil-borne diseases, and relates to the technical field of pesticides. The invention provides the application of linalool in prevention and control of soil-borne diseases of plants. A linalool microcapsule for prevention and control of soil-borne diseases of plants is prepared, and the linalool microcapsule has a good prevention and control effect on soil-borne diseases caused by Phytophthora nicotianae and Ralstonia solanacearum, and has a better effect on a field where the two kinds of diseases occur in a mixed mode. Compared with a chemical agent, the agent has the advantages of equivalent prevention effect, environment friendliness and no pesticide residue; and the control effect is better than that of a microbial agent and is stable.

Description

technical field [0001] The invention belongs to the technical field of pesticides, and in particular relates to the application of linalool in preventing and treating plant soil-borne diseases. Background technique [0002] Soil-borne diseases seriously endanger crop production. There are many types of pathogenic bacteria, wide transmission routes, and difficult to control. Phytophthora and Solanella, in particular, can infect a variety of crops, often causing devastating diseases. Tobacco black shank and bacterial wilt are caused by these two types of pathogenic bacteria, and the damage is extremely serious, especially in the southern smoking areas of my country, which often occur mixedly and are difficult to control. At present, the control of the above two diseases mainly relies on chemical agents, such as metalaxyl mancozeb, dimethomorph, propamocarb, etc. for the control of tobacco black shank, and the main agent for the control of bacterial wilt is Thiobacillus Coppe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N49/00A01N25/28A01P1/00A01P3/00
CPCA01N49/00A01N25/28
Inventor 张成省韩小斌荆常亮刘明宏赵栋霖王先勃池兴江刘京温明霞黄纯杨
Owner ZUNYI TOBACCO OF GUIZHOU TOBACCO CORP
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