阅读说明：本技术 含霜脲氰和氟啶胺的杀菌组合物及其在防治黄瓜霜霉病中的应用 (Bactericidal composition containing cymoxanil and fluazinam and application of bactericidal composition in prevention and treatment of cucumber downy mildew ) 是由 张松柏 刘勇 张德咏 于 2019-10-31 设计创作，主要内容包括：本发明公开了一种含霜脲氰和氟啶胺的杀菌组合物及其在防治黄瓜霜霉病中的应用,该杀菌组合物包括霜脲氰和氟啶胺,霜脲氰与氟啶胺的质量比为3～7∶3～7,可用于有效防治黄瓜霜霉病。该杀菌组合物可延缓和治理黄瓜霜霉病病原菌的抗药性,杀菌效果明显,见效快,药效持续时间长,且可以减少施药量,具有广泛的应用前景。(The invention discloses a bactericidal composition containing cymoxanil and fluazinam and application thereof in controlling cucumber downy mildew, wherein the bactericidal composition comprises the cymoxanil and the fluazinam, the mass ratio of the cymoxanil to the fluazinam is 3-7: 3-7, and the bactericidal composition can be used for effectively controlling the cucumber downy mildew. The bactericidal composition can delay and treat the drug resistance of cucumber downy mildew pathogenic bacteria, has obvious bactericidal effect, quick response and long drug effect duration, can reduce the application dosage, and has wide application prospect.)

1. The bactericidal composition containing cymoxanil and fluazinam is characterized by comprising cymoxanil and fluazinam, wherein the mass ratio of the cymoxanil to the fluazinam is 3-7: 3-7.

2. The bactericidal composition containing cymoxanil and fluazinam according to claim 1, wherein the mass ratio of cymoxanil to fluazinam is 3: 7.

3. The bactericidal composition containing cymoxanil and fluazinam according to claim 1, wherein the mass ratio of cymoxanil to fluazinam is 4: 6.

4. The bactericidal composition containing cymoxanil and fluazinam according to claim 1, characterized in that the mass ratio of cymoxanil to fluazinam is 5: 5.

5. The bactericidal composition containing cymoxanil and fluazinam according to claim 1, wherein the mass ratio of cymoxanil to fluazinam is 6: 4.

6. The bactericidal composition containing cymoxanil and fluazinam according to claim 1, characterized in that the mass ratio of cymoxanil to fluazinam is 7: 3.

7. The cymoxanil and fluazinam-containing fungicidal composition according to any one of claims 1 to 6, characterized in that the fungicidal composition further comprises auxiliary components.

8. Use of the bactericidal composition containing cymoxanil and fluazinam according to any one of claims 1 to 7 for controlling cucumber downy mildew.

9. Use according to claim 8, for the control of cucumber downy mildew of open cucumber.

10. Use according to claim 8 or 9, characterized in that it is carried out in a tank mix, i.e. cymoxanil and fluazinam are mixed in water for the control of cucumber downy mildew.

Technical Field

The invention belongs to the field of plant protection, relates to a bactericidal composition and application thereof, and particularly relates to a bactericidal composition containing cymoxanil and fluazinam and application thereof in preventing and treating cucumber downy mildew.

Background

Cucumber downy mildew is an air-borne disease caused by infection with Pseudoperonospora cubensis (Berk. & m.a. curtis) rotohaze, a fungus family, of the order oomycetes, the subdivision of the flagellata. The disease is one of the most important diseases affecting the safety production of the cucumbers, the spread and prevalence speed of the cucumber is extremely high in the whole growth period of the cucumber if appropriate disease conditions are met, and serious loss can be caused no matter the cucumber is cultivated in open fields or protected fields. Currently, the most effective method for controlling cucumber downy mildew is chemical agent control, however, the unreasonable use of a single agent or a single type of chemical agent is easy to cause the rapid rise of the drug resistance of pathogenic bacteria due to the selection pressure of the chemical agent. Researches show that the reasonable compound agent of the chemical agent is one of effective methods for solving the problem, not only can the generation of the drug resistance of pathogenic bacteria be delayed, the control effect be improved, but also the service life of the chemical agent can be prolonged, and the input amount of the chemical agent can be reduced, so that the problems of pesticide residue, environmental pollution and the like can be reduced.

Fluazinam is a dinitroaniline bactericide developed by Nippon stone Seiko, acts on a plurality of specific sites of ATP synthase at the tail end of the respiratory chain in mitochondria, and is the only bactericide which destroys the synthesis of pathogenic bacteria energy by inhibiting the respiratory action of pathogenic bacteria on the market at present. Cymoxanil is a fungicide with a systemic action, mainly acts on the biosynthesis of lipid compounds of fungi so as to inhibit the synthesis of cell membranes, and is a fungicide with protection and prevention functions. However, both bactericides are single-action targets, and if the bactericide is used singly at a high dose for a long time, the bactericide easily causes high selective pressure on strains, thereby accelerating the generation speed of drug resistance. Therefore, synergistic pharmaceutical compositions with different modes of action should be developed to solve the problem of rapid rise in drug resistance during production.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a bactericidal composition containing cymoxanil and fluazinam, which has a synergistic effect, is low in use cost, can reduce the use amount of pesticides and delay and treat the drug resistance of pathogenic bacteria of cucumber downy mildew, and an application thereof in preventing and treating cucumber downy mildew.

In order to solve the technical problems, the invention adopts the following technical scheme.

The bactericidal composition comprises cymoxanil and fluazinam, and the mass ratio of the cymoxanil to the fluazinam is 3-7: 3-7.

In the bactericidal composition containing cymoxanil and fluazinam, the weight ratio of the cymoxanil to the fluazinam is preferably 3: 7.

In the bactericidal composition containing cymoxanil and fluazinam, the mass ratio of the cymoxanil to the fluazinam is preferably 4: 6.

In the bactericidal composition containing cymoxanil and fluazinam, the mass ratio of the cymoxanil to the fluazinam is preferably 5: 5.

In the bactericidal composition containing cymoxanil and fluazinam, the mass ratio of the cymoxanil to the fluazinam is preferably 6: 4.

In the bactericidal composition containing cymoxanil and fluazinam, the mass ratio of the cymoxanil to the fluazinam is preferably 7: 3.

In the above-mentioned germicidal composition containing cymoxanil and fluazinam, preferably, the germicidal composition further comprises an auxiliary component. If the sterilizing composition is used for indoor toxicity, a small amount of acetone can be added, and then water is added for dilution, if field experiments are carried out, preparations can be adopted, and auxiliary components of the preparations can be determined according to actual requirements according to differences of dosage forms and manufacturers.

As a general technical concept, the invention also provides an application of the bactericidal composition containing cymoxanil and fluazinam in controlling cucumber downy mildew.

Of the above applications, preferably, the application is an application in controlling cucumber downy mildew of open field cucumbers.

In the above application, preferably, the application is carried out in a tank mixing mode, namely mixing cymoxanil and fluazinam in water for controlling cucumber downy mildew.

In the bactericidal composition containing cymoxanil and fluazinam, the mass ratio is 3-7: 3-7, so that a good control effect on cucumber downy mildew can be achieved. In the synergistic bactericidal composition (or the effective active ingredients), the mass ratio of the cymoxanil to the fluazinam is 3: 7 and 4: 6, the effect is better, and particularly, the 3: 7 is the best synergistic composition.

The germicidal composition containing cymoxanil and fluazinam according to the present invention is used in a method of preparation called "tank mix", i.e. a commercially available form of cymoxanil and fluazinam is mixed by the user into a quantity of water for the control of cucumber downy mildew, in particular for the control of cucumber downy mildew of open cucumbers.

The invention relates to the field of plant protection, in particular to a bactericidal composition containing cymoxanil and fluazinam.

Compared with the prior art, the invention has the advantages that:

the bactericidal composition containing cymoxanil and fluazinam has good synergistic effect in a specific range, can be used for delaying and controlling the drug resistance of cucumber downy mildew pathogenic bacteria, and has the advantages of quick response, long drug effect duration, low use cost, obvious reduction of pesticide use amount and very good prevention and control effect on cucumber downy mildew.

Detailed Description

The invention is further described below with reference to specific preferred embodiments, without thereby limiting the scope of protection of the invention.

The materials and equipment used in the following examples are commercially available.