CN117426391A - Sterilization composition containing thifluzamide - Google Patents

Sterilization composition containing thifluzamide Download PDF

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Publication number
CN117426391A
CN117426391A CN202311490471.0A CN202311490471A CN117426391A CN 117426391 A CN117426391 A CN 117426391A CN 202311490471 A CN202311490471 A CN 202311490471A CN 117426391 A CN117426391 A CN 117426391A
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CN
China
Prior art keywords
thifluzamide
pyraclostrobin
corn
bactericidal composition
southern rust
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311490471.0A
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Chinese (zh)
Inventor
张风文
姜兴印
李向东
王一庚
田延平
闫志勇
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Shandong Agricultural University
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Shandong Agricultural University
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Priority to CN202311490471.0A priority Critical patent/CN117426391A/en
Publication of CN117426391A publication Critical patent/CN117426391A/en
Pending legal-status Critical Current

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    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01NPRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N47/00Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
    • A01N47/08Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
    • A01N47/10Carbamic acid derivatives, i.e. containing the group —O—CO—N<; Thio analogues thereof
    • A01N47/24Carbamic acid derivatives, i.e. containing the group —O—CO—N<; Thio analogues thereof containing the groups, or; Thio analogues thereof
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01GHORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G13/00Protecting plants
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01NPRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N47/00Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
    • A01N47/02Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having no bond to a nitrogen atom
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01PBIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
    • A01P3/00Fungicides

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Plant Pathology (AREA)
  • General Health & Medical Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Dentistry (AREA)
  • Agronomy & Crop Science (AREA)
  • Microbiology (AREA)
  • Mycology (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Toxicology (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

The invention discloses a bactericidal composition containing thifluzamide, and belongs to the technical field of pesticides. The active ingredients of the bactericidal composition comprise thifluzamide and pyraclostrobin, and the weight ratio of the thifluzamide to the pyraclostrobin is 20:1-1:1. The thifluzamide and the pyraclostrobin are mixed for use, so that the thifluzamide and the pyraclostrobin have remarkable synergistic effect, effectively reduce the use dosage, delay the occurrence of drug resistance and can be used for preventing and treating southern rust of corn.

Description

Sterilization composition containing thifluzamide
Technical Field
The invention relates to the technical field of pesticides, in particular to a bactericidal composition containing thifluzamide.
Background
Thifluzamide belongs to thiazole amide bactericides, has an action mechanism of succinic dehydrogenase inhibitor, and has strong systemic conductivity and long lasting effect. Thifluzamide has activity on pathogenic fungi such as rhizoctonia, puccinia, blackia, rhizoctonia, fusarium and the like, and has special effects on diseases caused by basidiomycete fungi such as banded sclerotial blight and the like. Is widely applied to various crops such as rice, wheat, potato, peanut, cotton, beet and the like, lawns and the like.
Pyraclostrobin is a bactericide of methoxy acrylic esters. The action mechanism is mitochondrial respiration inhibitor, and has the characteristics of permeability, local systemic activity, long lasting period, rain wash resistance and the like. Has strong inhibiting effect on spore germination and mycelium growth in leaves, and has protective and therapeutic activities. The compound has low toxicity, is relatively safe to non-target organisms, is environment-friendly, is listed as a candidate agent for reducing risks by EPA in the United states, and is widely used for preventing and treating various diseases on crops such as wheat, rice, peanut, grape, potato, vegetables, various fruit trees and the like.
The southern rust is a typical air-borne disease and has the characteristics of high spreading and epidemic speed, strong outbreak and damage loss of weight. Can occur in all overground tissues of corn plants, mainly in corn leaves, and can also be in the serious cases in the form of ears, bracts or even male flowers. Once the prevention and control are insufficient, more than 10% of yield loss can be caused, when the disease is heavy, the leaves are fully distributed in spore stacks, then the leaves are dried up in advance, more than 50% of yield reduction can be caused for corn yield, and part of land parcels are even dead. There is no report in the prior art on the combined use of thifluzamide and pyraclostrobin for preventing and treating southern rust in corn.
Disclosure of Invention
The present invention has been made in view of the above-mentioned prior art, and an object of the present invention is to provide a bactericidal composition containing thifluzamide. The thifluzamide and the pyraclostrobin are mixed for use, so that the thifluzamide and the pyraclostrobin have remarkable synergistic effect, effectively reduce the use dosage, delay the occurrence of drug resistance and can be used for preventing and treating southern rust of corn.
In order to achieve the above purpose, the invention adopts the following technical scheme:
according to the first aspect of the invention, a bactericidal composition containing thifluzamide is provided, and the active ingredients of the bactericidal composition comprise thifluzamide and pyraclostrobin, wherein the weight ratio of the thifluzamide to the pyraclostrobin is 20:1-1:1.
Preferably, the weight ratio of thifluzamide to pyraclostrobin is 5:1.
In a second aspect of the present invention, there is provided the use of the above-described fungicidal composition in (1) or (2) as follows:
(1) Preventing and treating southern rust of corn;
(2) And preparing a product for preventing and treating southern rust of corn.
In a third aspect of the present invention, there is provided a medicament for controlling southern rust in corn, the medicament comprising an effective amount of the bactericidal composition described above.
Preferably, in the medicament, the weight percentage of the bactericidal composition is 10-60%.
Preferably, the dosage form of the medicament can be granules, powder, suspending agents, water agents, aqueous emulsion, sustained release agents, tablets and the like.
In a fourth aspect, the invention provides application of the medicament in preventing and treating southern rust of corn.
In a fifth aspect of the present invention, there is provided a method for controlling southern rust in corn, comprising the steps of:
before or during the onset of southern rust disease of corn, the medicament is sprayed on the aerial parts of corn plants.
The invention has the beneficial effects that:
the invention discovers that thifluzamide and pyraclostrobin are mixed, the synergistic effect of the thifluzamide and pyraclostrobin is obvious within the range of 20:1-1:1, wherein 5:1 is the optimal ratio. Can reduce the dosage of the medicament, improve the control effect, reduce the use cost, delay the medicament resistance and improve the safety to crops and environment.
The specific embodiment is as follows:
it should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In order to enable those skilled in the art to more clearly understand the technical solutions of the present application, the technical solutions of the present application will be described in detail below with reference to specific embodiments. If experimental details are not specified in the examples, the conditions are generally conventional or recommended by the reagent company; reagents, consumables, etc. used in the following examples and comparative examples are commercially available unless otherwise specified.
Example 1: preparation of bactericidal composition containing thifluzamide
The thifluzamide and the pyraclostrobin are mixed according to the weight ratio of 1:1 to be used as the bactericidal composition containing the thifluzamide.
Example 2: preparation of bactericidal composition containing thifluzamide
The thifluzamide and the pyraclostrobin are mixed according to a weight ratio of 5:1 to obtain the bactericidal composition containing the thifluzamide.
Example 3: preparation of bactericidal composition containing thifluzamide
The thifluzamide and the pyraclostrobin are mixed according to the weight ratio of 10:1 to be used as the bactericidal composition containing the thifluzamide.
Example 4: preparation of bactericidal composition containing thifluzamide
The thifluzamide and the pyraclostrobin are mixed according to the weight ratio of 15:1 to be used as the bactericidal composition containing the thifluzamide.
Example 5: preparation of bactericidal composition containing thifluzamide
The thifluzamide and the pyraclostrobin are mixed according to the weight ratio of 20:1 to be used as the bactericidal composition containing the thifluzamide.
Example 6: preparation of bactericidal composition containing thifluzamide
The thifluzamide and the pyraclostrobin are mixed according to the weight ratio of 30:1 to be used as the bactericidal composition containing the thifluzamide.
Example 4: preparation of bactericidal composition containing thifluzamide
The thifluzamide and the pyraclostrobin are mixed according to the weight ratio of 1:5 to obtain the bactericidal composition containing the thifluzamide.
Application example: indoor toxicity determination test of thifluzamide and pyraclostrobin on southern corn rust
1. Testing for pathogenic bacteria: southern rust (Puccinia polysora Underw) of maize. And (5) field collection, and separating and identifying the obtained product to be used for indoor toxicity measurement.
2. The test method comprises the following steps:
reference is made to the combined action assay of spore germination concave slide method (NY/T1156.1-2006) and bactericide compounding (NY/T1156.6-2006) of the pesticide indoor biological assay criterion bactericide. Sequentially sucking 1mL from low concentration to high concentration by a pipette or a pipette, respectively adding into small test tubes, and then sucking 1mL of prepared spore suspension, so that the liquid medicine and the spore suspension are equal in quantity and uniformly mixed.
The mixed liquid is sucked by a microsampler and is put on a concave slide, then the concave slide is put in a culture dish with shallow water, and the concave slide is covered and cultured in an incubator with proper temperature. No less than 4 replicates per treatment and no drug containing treatment was used as a blank. And (3) culturing for 5h in an illumination biochemical incubator at 28 ℃ with the relative humidity of 90%.
When the germination rate of the blank control spores reaches more than 90%, the germination condition of each treated spore is checked. Since the germination rate of spores of southern rust of corn is relatively low, the germination of spores of each treatment is checked when the germination rate of spores of the blank control reaches more than 85% in the test process.
Three or more fields were randomly observed for each treatment, the total number of spores was not less than 200, and the germination number and total number of spores were recorded, respectively. The short radius of the spore bud tube length greater than the spores is considered germination.
The blank control spore germination inhibition rate is less than 5% without correction; the blank control spore germination inhibition rate is 5% -20%, and the correction inhibition rate of each treatment is calculated by using an Abott formula; the blank control spore germination inhibition rate is more than 20%, and then the test is required to be reworked.
According to investigation data, calculating the relative inhibition rate of spore germination of each treatment, wherein the unit is percentage (%), the control effect of each treatment concentration is calculated according to a formula, then adopting DPS data processing software to calculate test results, respectively solving virulence regression equations, EC50 and EC90 and 95% confidence limits of single-dose and mixed agents with different proportions of the test agents, solving co-toxicity coefficients (CTC) of the two agents with different proportions, and screening out the optimal proportion of the test agents. And records each process all the repeated raw data.
Correction inhibition (%) = (control spore germination rate-treated spore germination rate)/control spore germination rate x 100
And calculating the co-toxicity coefficient (CTC) of the compound medicament mixture according to the grand cloud Pei method. The co-toxicity coefficient (CTC) is calculated as follows:
measured virulence index (ATI) = (EC 50 of standard agent/EC 50 of test agent) ×100
Theoretical Toxicity Index (TTI) =toxicity index of agent a x percent of agent a in the mix + toxicity index of agent B x percent of agent B in the mix
Co-toxicity coefficient (CTC) = (ATI/TTI) ×100
According to the division standard of co-toxicity coefficient (CTC), CTC is less than or equal to 80 and is antagonism, CTC 80 is additive, CTC is greater than or equal to 120 and is synergistic.
3. Test results:
the test results are shown in Table 1.
Table 1: indoor combined toxicity measurement result of thifluzamide and pyraclostrobin on southern corn rust pathogen
As can be seen from the results in Table 1, the thifluzamide and the pyraclostrobin are mixed, the co-toxicity coefficient (CTC) of the thifluzamide and the pyraclostrobin is greater than 120 in the range of 20:1-1:1, the synergistic effect is obvious, and the thifluzamide and the pyraclostrobin show very high activity on southern rust bacteria, wherein the ratio of 5:1 is the optimal ratio.
In conclusion, the bactericidal composition thifluzamide and pyraclostrobin are compounded, the synergistic effect is obvious, the dosage of the medicament can be reduced, the effect of preventing and treating southern rust of corn is improved, the use cost is reduced, the medicament resistance is delayed, and the safety to crops and the environment is improved.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (7)

1. The bactericidal composition containing the thifluzamide is characterized in that the active ingredients of the bactericidal composition contain the thifluzamide and the pyraclostrobin, and the weight ratio of the thifluzamide to the pyraclostrobin is 20:1-1:1.
2. The bactericidal composition of claim 1, wherein the weight ratio of thifluzamide to pyraclostrobin is 5:1.
3. Use of the fungicidal composition as claimed in claim 1 or 2 in (1) or (2) as follows:
(1) Preventing and treating southern rust of corn;
(2) And preparing a product for preventing and treating southern rust of corn.
4. A medicament for controlling southern rust in corn, comprising an effective amount of the fungicidal composition of claim 1 or 2.
5. The pharmaceutical formulation of claim 4, wherein the formulation of the pharmaceutical formulation is a granule, powder, suspension, aqueous solution, emulsion in water, sustained release formulation, or tablet.
6. Use of the agent according to claim 4 or 5 for controlling southern rust in corn.
7. A method for controlling southern rust in corn, comprising the steps of:
the agent of claim 4 or 5 is sprayed on the aerial parts of corn plants before or at the time of onset of southern rust disease of corn.
CN202311490471.0A 2023-11-10 2023-11-10 Sterilization composition containing thifluzamide Pending CN117426391A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311490471.0A CN117426391A (en) 2023-11-10 2023-11-10 Sterilization composition containing thifluzamide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311490471.0A CN117426391A (en) 2023-11-10 2023-11-10 Sterilization composition containing thifluzamide

Publications (1)

Publication Number Publication Date
CN117426391A true CN117426391A (en) 2024-01-23

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Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
CN (1) CN117426391A (en)

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