CN111616152A - Sterilization composition containing tetraconazole and flusilazole and application thereof - Google Patents

Abstract

The invention discloses a bactericidal composition containing tetraconazole and flusilazole and application thereof, and relates to the technical field of pesticides, wherein the bactericidal composition comprises effective components and an auxiliary agent, the effective components account for 2-50% of the total mass, the effective components comprise tetraconazole and flusilazole, and the mass ratio of the tetraconazole to the flusilazole is (1-25): (1-25). The broad-spectrum bactericidal composition for preventing and treating banana scab is prepared by compounding tetraconazole and flusilazole with different action mechanisms serving as main components, and has the characteristics of high efficiency, low toxicity, low residue and excellent prevention and treatment effect.

Description

Sterilization composition containing tetraconazole and flusilazole and application thereof

Technical Field

The invention relates to the technical field of pesticides, and particularly relates to a bactericidal composition containing tetraconazole and flusilazole for preventing and treating banana scab and application of the bactericidal composition in preventing and treating banana scab.

Background

The banana scab is a main disease affecting the quality of bananas, mainly damaging leaves and green fruits, and preventing the banana scab from being scab germs. The affected leaves initially appear a plurality of dark brown to black specks on the leaves, are densely piled and similar to coal smoke, appear as stripes from the middle pulse to the edges of the leaves, then the speckles are enlarged, the outer edges have light yellow halos, the middle part is light yellow brown or gray, the seriously damaged leaves turn yellow, wither in advance and die. The damaged Chinese olive produces a plurality of scattered or dense black brown small grains, short stripes and round or oval disease spots on the bending part of the fruit back and the surface of the fruit finger, the edge of the disease spot is brown, a light yellow brown halo is arranged on the periphery of the disease spot, the disease is aggravated when the fruit is mature, the surface of the fruit is blackened in a large area, the diseased fruit is not uniformly soft and ripe, the diseased part tissue is mildewed and sunk, and a plurality of small black spots are grown. The banana scab is widely distributed in banana producing areas in China.

At present, the pesticides for preventing and treating banana scab mainly comprise myclobutanil, pyraclostrobin, thiophanate methyl and the like, and the pesticides are easy to induce pathogenic bacteria to generate drug resistance after long-term use, so that the problems of increased dosage, reduced control effect, shortened lasting period and the like are caused, and the sustainable development of the environment is not facilitated.

Disclosure of Invention

Aiming at the technical defects, the invention discloses a bactericidal composition containing tetraconazole and flusilazole and application thereof, which are used for realizing the following purposes:

the control effect is good, and the control effect on banana scab is up to 74% at most after the pesticide is applied for 7 days;

secondly, the drug effect is fast, the post-drug repair is fast, the drug effect duration is long, and the drug resistance can not be generated;

thirdly, the efficacy is high, and the dosage is low;

fourthly, the adhesive property is good, and the rain erosion resistance is strong;

fifth, the security is high, innoxious to environment and people and animals.

In order to achieve the purpose, the technical scheme of the invention is as follows:

the bactericidal composition containing tetraconazole and flusilazole comprises effective components and an auxiliary agent, wherein the effective components account for 2% -50% of the total mass, the effective components comprise tetraconazole and flusilazole, and the mass ratio of the tetraconazole to the flusilazole is (1-25): (1-25).

Preferably, the effective components account for 2-30% of the total mass, and the mass ratio of the tetraconazole to the flusilazole is (1-15): (1-15).

Wherein the bactericidal composition is one of a suspending agent, a microemulsion or an aqueous emulsion.

As an embodiment, the bactericidal composition is a suspending agent, and comprises the following components in percentage by weight: 1-25% of tetraconazole, 1-25% of flusilazole, 1-6% of dispersing agent, 1-5% of wetting agent, 4-6% of antifreezing agent, 0.1-2% of thickening agent, 0.1-1% of defoaming agent, 0.1-1% of preservative, 0.5-2% of structure regulator and water, wherein the balance is up to 100%.

The specific preparation method of the suspending agent comprises the following steps:

firstly, weighing a dispersing agent, a wetting agent, an antifreezing agent, a defoaming agent, a preservative and water according to the proportion, uniformly mixing, then adding tetraconazole, flusilazole, a thickening agent and a structure regulator according to the proportion, and sanding for 2-3 hours to ensure that the particle size of the suspending agent is below 5 micrometers, thus obtaining the suspending agent preparation of the bactericide composition containing tetraconazole and flusilazole.

As another embodiment, the germicidal composition is a microemulsion comprising, by weight percent: 1-25% of tetraconazole, 1-25% of flusilazole, 5-20% of emulsifier, 10-20% of solvent, 1-6% of antifreezing agent, 0.1-1% of defoaming agent and water, wherein the balance is up to 100%.

The preparation method of the microemulsion comprises the following steps:

dissolving tetraconazole, flusilazole and a solvent together according to the proportion to form a uniform oil phase; then adding an emulsifier according to the proportion and stirring uniformly; then mixing water, an antifreezing agent, a thickening agent and a defoaming agent together according to a ratio to form a uniform water phase; adding the water phase into the oil phase while stirring at high speed in the reaction kettle to form transparent microemulsion, thus obtaining the microemulsion preparation of the bactericide composition containing tetraconazole and flusilazole.

As another embodiment, the bactericidal composition is an aqueous emulsion, and comprises the following components in percentage by weight: 1-25% of tetraconazole, 1-25% of flusilazole, 1-10% of emulsifier, 10-20% of solvent, 1-8% of antifreezing agent, 0.1-2% of thickening agent, 0.1-0.8% of defoaming agent and water, wherein the balance is up to 100%.

The preparation method of the aqueous emulsion comprises the following steps:

dissolving tetraconazole, flusilazole and a solvent together according to the proportion, adding an emulsifier according to the proportion, and uniformly stirring to form a uniform oil phase; then mixing part of water, the antifreezing agent, the thickening agent and the defoaming agent together according to the proportion to form a uniform water phase; adding the oil phase into the water phase while stirring at a high speed in a reaction kettle, slowly adding water to a phase inversion point, carrying out high-speed shearing, adding the rest water, and shearing for about half an hour to form an oil-in-water type emulsion in water, namely the emulsion in water preparation of the bactericide composition containing tetraconazole and flusilazole.

Wherein the dispersing agent is one or more of polycarboxylate, glycerin fatty acid ester polyoxyethylene ether, alkylphenol polyoxyethylene formaldehyde condensate, calcium lignosulfonate, naphthalene sulfonate and diphenyl phenol polyoxyethylene polyoxymethylene condensate.

Wherein the wetting agent is: one of alkylphenol polyoxyethylene phosphate, polyoxyethylene polyoxypropylene block copolymer and alkylphenol polyoxyethylene.

Wherein the preservative is one of cason, benzoic acid and sodium benzoate.

Wherein the structure regulator is one or more of kaolin, diatomite, bentonite, white carbon black and magnesium aluminum silicate.

Wherein the antifreezing agent is one or more of ethylene glycol, propylene glycol, glycerol, polyethylene glycol, urea and sorbitol.

Wherein the thickener is one or more of xanthan gum, sodium carboxymethylcellulose, polyvinyl alcohol, guar gum and sodium alginate.

Wherein the defoaming agent is one or more of n-butyl alcohol, polydimethylsiloxane, trialkyl melamine and lauric acid.

Wherein the solvent is one or more of methanol, ethanol, butanol, propylene glycol, glycerol, polyethylene glycol, acetone, cyclohexanone, pyrrolidone, toluene, xylene, ethyl acetate, sec-butyl acetate, decalin, petroleum ether and pine matrix vegetable oil.

The emulsifier is one or more of alkylphenol polyoxyethylene ether formaldehyde condensate, alkylphenol polyoxyethylene ether phosphate, diphenyl phenol polyoxyethylene polyoxypropylene ether, styrol polyoxyethylene ether, diphenyl phenol polyoxyethylene polyoxy-formaldehyde condensate, agricultural milk 300#, agricultural milk 500#, agricultural milk 600#, agricultural milk 700#, agricultural milk 0201B, agricultural milk 0203B and methylene dinaphthalene sodium sulfonate.

The sterilization composition containing tetraconazole and flusilazole is applied to preventing and treating banana scab, and the highest effect of preventing and treating banana scab reaches 74 percent after the sterilization composition is applied in a field for 7 days; the highest prevention and treatment effect on banana scab reaches 92% after the indoor drug is used for 10 days.

After the technical scheme is adopted, the invention has the beneficial effects that:

the broad-spectrum bactericidal composition for preventing and treating banana scab is prepared by compounding tetraconazole and flusilazole with different action mechanisms as main components, has the characteristics of high efficiency, low toxicity, low residue and excellent prevention and treatment effect, and specifically comprises the following components:

according to the bactericidal composition containing tetraconazole and flusilazole, the tetraconazole and the flusilazole have a synergistic effect within a certain combination proportion range, and the control effect on germs is obviously improved compared with that of the single use of the tetraconazole and the flusilazole;

secondly, the bactericidal composition containing tetraconazole and flusilazole has quick-acting property and quick restoration after being applied to treat banana scab, the sign of drying of the back of a scab appears after 1 day of application, and the efficacy is obvious after 2 days of application;

the tetraconazole and the flusilazole respectively have different action mechanisms, all diseases are effectively controlled 4 days after the sterilization, no continuous infection phenomenon occurs on healthy leaves after the sterilization is carried out for 30 days, the lasting period is long, the drying speed and the degree of scab are better than those of the scab which is singly used, and the drug resistance cannot be generated;

fourthly, the bactericidal composition containing tetraconazole and flusilazole has higher pesticide effect and reduces the pesticide dosage;

the sterilization composition containing tetraconazole and flusilazole is safe to bananas, has no abnormal phenomenon on flowers and growth of tender leaves at growth points in the medication process, and is high in safety;

sixthly, the surfaces of the banana leaves are smooth, and the liquid medicine is not easy to adhere, when the bactericidal composition containing tetraconazole and flusilazole is used for spraying the banana leaves forward and backward uniformly, the bactericidal composition has better adhesiveness and strong rain erosion resistance due to the use of a special surfactant;

the sterilization composition containing tetraconazole and flusilazole has low toxicity, short residual time of degradation products in the environment, no toxicity to the environment, people and livestock and no public nuisance, is a good environment-friendly medicament, and reduces the pollution to the environment.

The specific implementation mode is as follows:

the present invention will be described in detail with reference to examples.

A sterilization composition containing tetraconazole and flusilazole comprises effective components and an auxiliary agent, wherein the effective components account for 2-50% of the total mass, the effective components comprise tetraconazole and flusilazole, and the mass ratio of the tetraconazole to the flusilazole is (1-25): (1-25). Further preferably, the effective components account for 2-30% of the total mass, and the mass ratio of tetraconazole to flusilazole is (1-15): (1-15).

The bactericidal composition containing tetraconazole and flusilazole is one of a suspending agent, a microemulsion or an aqueous emulsion.

The specific implementation mode is as follows:

the first embodiment is as follows:

a sterilization composition containing tetraconazole and flusilazole is a suspending agent and comprises effective components and an auxiliary agent. The effective components account for 2-50% of the total mass, and comprise: 1-25% of tetraconazole, 1-25% of flusilazole, 1-6% of dispersing agent, 1-5% of wetting agent, 4-6% of antifreezing agent, 0.1-2% of thickening agent, 0.1-1% of defoaming agent, 0.1-1% of preservative, 0.5-2% of structure regulator and water which are added to 100%

In this embodiment, the dispersant is one or more of a polycarboxylate, a glycerin fatty acid ester polyoxyethylene ether, an alkylphenol polyoxyethylene ether formaldehyde condensate, a calcium lignosulfonate, a naphthalenesulfonate, and a diphenylphenol polyoxyethylene polyoxy-formaldehyde condensate, and more preferably, the dispersant is a polycarboxylate.

In this embodiment, the wetting agent is one of alkylphenol polyoxyethylene phosphate, polyoxyethylene polyoxypropylene block copolymer, and alkylphenol polyoxyethylene, and more preferably, the wetting agent is alkylphenol polyoxyethylene.

In the present embodiment, the preservative is one of cason, benzoic acid, and sodium benzoate, and more preferably cason.

In this embodiment, the structure modifier is one or more of kaolin, diatomaceous earth, bentonite, white carbon black, and magnesium aluminum silicate, and more preferably, the structure modifier is bentonite.

In this embodiment, the antifreeze is one or more selected from ethylene glycol, propylene glycol, glycerin, polyethylene glycol, urea, and sorbitol, and more preferably propylene glycol.

In this embodiment, the thickener is one or more of xanthan gum, sodium carboxymethylcellulose, polyvinyl alcohol, guar gum, and sodium alginate, and more preferably, the thickener is xanthan gum.

In the present embodiment, the defoaming agent is one or more of n-butanol, polydimethylsiloxane, trialkylamine, and lauric acid, and more preferably, the defoaming agent is n-butanol.

The preparation method of the suspending agent comprises the following steps:

s1, weighing a dispersing agent, a wetting agent, an antifreezing agent, a defoaming agent, an antiseptic and water according to the proportion, and uniformly mixing, wherein the preferred mixing is carried out by a high-speed shearing machine in the embodiment;

s2, adding tetraconazole, flusilazole, a thickening agent and a structure regulator according to the proportion, and sanding for 2-3 hours in a sand mill to ensure that the particle size of the suspending agent is below 5 microns, thus obtaining the suspending agent preparation of the bactericide composition containing tetraconazole and flusilazole.

Example two:

this embodiment is substantially the same as the first embodiment, except that:

the effective components account for 14 percent of the total mass, and the mass ratio of tetraconazole to flusilazole is 4: 10. comprises the following components in percentage by weight: 4% of tetraconazole, 10% of flusilazole, 4% of dispersing agent, 3% of wetting agent, 4% of antifreezing agent, 0.3% of thickening agent, 0.5% of defoaming agent, 0.5% of preservative, 1% of structure regulator and water, wherein the balance is up to 100%.

Example three:

this embodiment is substantially the same as the first embodiment, except that:

the effective components account for 50 percent of the total mass, the mass ratio of tetraconazole to flusilazole is 25: 25. according to the weight percentage, the coating comprises 25% of tetraconazole, 25% of flusilazole, 5% of dispersing agent, 1% of wetting agent, 4% of antifreezing agent, 0.2% of thickening agent, 0.5% of defoaming agent, 0.1% of preservative, 1.5% of structure regulator and water which are added to 100%.

Example four:

this embodiment is substantially the same as the first embodiment, except that:

the active ingredients account for 2 percent of the total mass, and the mass ratio of tetraconazole to flusilazole is 1: 1. the coating comprises 1% of tetraconazole, 1% of flusilazole, 6% of dispersing agent, 5% of wetting agent, 5% of antifreezing agent, 0.3% of thickening agent, 0.5% of defoaming agent, 1% of preservative, 2% of structure regulator and water which are added to 100% by weight.

Example five:

this embodiment is substantially the same as the first embodiment, except that:

the effective components account for 30 percent of the total mass, the mass ratio of tetraconazole to flusilazole is 15: 15. according to the weight percentage, the coating comprises 15% of tetraconazole, 15% of flusilazole, 5% of dispersing agent, 2% of wetting agent, 4% of antifreezing agent, 0.5% of thickening agent, 0.3% of defoaming agent, 0.3% of preservative, 0.5% of structure regulator and water which are complemented to 100%.

Example six:

this embodiment is substantially the same as the first embodiment, except that:

the active ingredients account for 20 percent of the total mass, the mass ratio of tetraconazole to flusilazole is 10: 10. according to the weight percentage, the coating comprises 10% of tetraconazole, 10% of flusilazole, 1% of dispersing agent, 2% of wetting agent, 6% of antifreezing agent, 0.1% of thickening agent, 0.1% of defoaming agent, 0.6% of preservative, 1.2% of structure regulator and water which are added to 100%.

Example seven:

this embodiment is substantially the same as the first embodiment, except that:

the active ingredients account for 10 percent of the total mass, and the mass ratio of tetraconazole to flusilazole is 5: 5. the coating comprises, by weight, 5% of tetraconazole, 5% of flusilazole, 3% of a dispersing agent, 4% of a wetting agent, 5% of an antifreezing agent, 2% of a thickening agent, 1% of a defoaming agent, 0.8% of a preservative, 1.5% of a structure regulator and water, wherein the balance is added to 100%.

Example eight:

a sterilization composition containing tetraconazole and flusilazole is a microemulsion and comprises effective components and an auxiliary agent. The effective components account for 2-50% of the total mass, the effective components comprise tetraconazole and flusilazole, and the mass ratio of the tetraconazole to the flusilazole is (1-25): (1-25). The auxiliary agent comprises an emulsifier, a solvent, an antifreezing agent, a thickening agent and a defoaming agent. Comprises the following components in percentage by weight: 1-25% of tetraconazole, 1-25% of flusilazole, 5-20% of emulsifier, 10-20% of solvent, 1-6% of antifreezing agent, 0.1-1% of defoaming agent and water, wherein the balance is up to 100%.

In this embodiment, the solvent is one or more selected from methanol, ethanol, butanol, propylene glycol, glycerol, polyethylene glycol, acetone, cyclohexanone, pyrrolidone, toluene, xylene, ethyl acetate, sec-butyl acetate, decalin, petroleum ether, and pine-based vegetable oil, and more preferably the solvent is pine-based vegetable oil.

In the embodiment, the emulsifier is one or more of alkylphenol polyoxyethylene ether formaldehyde condensate, alkylphenol polyoxyethylene ether phosphate, diphenylphenol polyoxyethylene polyoxypropylene ether, styryl phenol polyoxyethylene ether, diphenylphenol polyoxyethylene polyoxy-formaldehyde condensate, agricultural milk 300#, agricultural milk 500#, agricultural milk 600#, agricultural milk 700#, agricultural milk 0201B, agricultural milk 0203B and sodium methylene dinaphthalene sulfonate, and further preferably, the emulsifier is alkylphenol polyoxyethylene ether formaldehyde condensate.

In this embodiment, the antifreeze is one or more selected from ethylene glycol, propylene glycol, glycerin, polyethylene glycol, urea, and sorbitol, and further preferably glycerin.

In the present embodiment, the defoaming agent is one or more of n-butanol, polydimethylsiloxane, trialkylamine, and lauric acid, and more preferably, the defoaming agent is n-butanol.

The preparation method of the microemulsion comprises the following steps:

s1, dissolving tetraconazole, flusilazole and a solvent together according to a ratio, mixing into a uniform oil phase, adding an emulsifier according to a ratio, and stirring uniformly;

s2, mixing water, an antifreezing agent and a defoaming agent together according to a ratio to form a uniform water phase;

s3, adding the water phase into the oil phase while stirring at high speed in the reaction kettle to form transparent microemulsion, thus obtaining the microemulsion preparation of the bactericide composition containing tetraconazole and flusilazole.

Example nine:

this embodiment is basically the same as example eight, except that:

the effective components account for 30 percent of the total mass, the mass ratio of tetraconazole to flusilazole is 15: 15. comprises the following components in percentage by weight: 15% of tetraconazole, 15% of flusilazole, 10% of emulsifier, 15% of solvent, 3% of antifreezing agent, 0.5% of defoaming agent and water, wherein the water is added to 100%.

Example ten:

this embodiment is basically the same as example eight, except that:

the effective components account for 50 percent of the total mass, the mass ratio of tetraconazole to flusilazole is 25: 25. comprises the following components in percentage by weight: 25% of tetraconazole, 25% of flusilazole, 8% of emulsifier, 20% of solvent, 6% of antifreezing agent, 0.3% of defoaming agent and water, wherein the water is added to 100%.

Example eleven:

this embodiment is basically the same as example eight, except that:

the active ingredients account for 2 percent of the total mass, and the mass ratio of tetraconazole to flusilazole is 1: 1. comprises the following components in percentage by weight: 1% of tetraconazole, 1% of flusilazole, 5% of emulsifier, 10% of solvent, 1% of antifreezing agent, 0.1% of defoaming agent and water, and the balance is made up to 100%.

Example twelve:

this embodiment is basically the same as example eight, except that:

the effective components account for 14 percent of the total mass, and the mass ratio of tetraconazole to flusilazole is 4: 10. comprises the following components in percentage by weight: 4% of tetraconazole, 10% of flusilazole, 15% of emulsifier, 15% of solvent, 3% of antifreezing agent, 0.5% of defoaming agent and water, wherein the water is added to 100%.

Example thirteen:

this embodiment is basically the same as example eight, except that:

the active ingredients account for 20 percent of the total mass, the mass ratio of tetraconazole to flusilazole is 10: 10. comprises the following components in percentage by weight: 10% of tetraconazole, 10% of flusilazole, 20% of emulsifier, 15% of solvent, 5% of antifreezing agent, 1% of defoaming agent and water, and the balance is made up to 100%.

Example fourteen:

a sterilization composition containing tetraconazole and flusilazole is an aqueous emulsion and comprises effective components and an auxiliary agent. The effective components account for 2-50% of the total mass, the effective components comprise tetraconazole and flusilazole, and the mass ratio of the tetraconazole to the flusilazole is (1-25): (1-25). The auxiliary agent comprises an emulsifier, a solvent, an antifreezing agent, a thickening agent and a defoaming agent. Comprises the following components in percentage by weight: 1-25% of tetraconazole, 1-25% of flusilazole, 1-10% of emulsifier, 10-20% of solvent, 1-8% of antifreezing agent, 0.1-2% of thickening agent, 0.1-0.8% of defoaming agent and water, wherein the balance is up to 100%.

In this embodiment, the solvent is one or more selected from methanol, ethanol, butanol, propylene glycol, glycerol, polyethylene glycol, acetone, cyclohexanone, pyrrolidone, toluene, xylene, ethyl acetate, sec-butyl acetate, decalin, petroleum ether, and pine-based vegetable oil, and more preferably the solvent is pine-based vegetable oil.

In the embodiment, the emulsifier is one or more of alkylphenol polyoxyethylene ether formaldehyde condensate, alkylphenol polyoxyethylene ether phosphate, diphenylphenol polyoxyethylene polyoxypropylene ether, styryl phenol polyoxyethylene ether, diphenylphenol polyoxyethylene polyoxy-formaldehyde condensate, agricultural milk 300#, agricultural milk 500#, agricultural milk 600#, agricultural milk 700#, agricultural milk 0201B, agricultural milk 0203B and sodium methylene dinaphthalene sulfonate, and further preferably, the emulsifier is alkylphenol polyoxyethylene ether phosphate.

In this embodiment, the antifreeze is one or more selected from ethylene glycol, propylene glycol, glycerin, polyethylene glycol, urea, and sorbitol, and more preferably propylene glycol.

In this embodiment, the thickener is one or more of xanthan gum, sodium carboxymethylcellulose, polyvinyl alcohol, guar gum, and sodium alginate, and more preferably, the thickener is xanthan gum.

In the present embodiment, the defoaming agent is one or more of n-butanol, polydimethylsiloxane, trialkylamine, and lauric acid, and more preferably, the defoaming agent is polydimethylsiloxane.

The preparation method of the aqueous emulsion comprises the following steps:

s1, dissolving tetraconazole, flusilazole and a solvent together according to a ratio, adding an emulsifier, and mixing to form a uniform oil phase;

s2, mixing part of water, an antifreezing agent, a thickening agent and a defoaming agent together according to a ratio to form a uniform water phase;

s3, adding the oil phase into the water phase while stirring at a high speed in the reaction kettle, and slowly adding water to a phase inversion point;

s4, opening a shearing machine to shear at high speed, adding the rest water, and shearing for about half an hour to form an oil-in-water type emulsion in water, namely the emulsion in water preparation of the bactericide composition containing tetraconazole and flusilazole.

Example fifteen:

this embodiment is substantially the same as example fourteen, except that:

the effective components account for 30 percent of the total mass, the mass ratio of tetraconazole to flusilazole is 15: 15. according to the weight percentage, the coating comprises 15% of tetraconazole, 15% of flusilazole, 10% of emulsifier, 20% of solvent, 8% of antifreezing agent, 0.2% of thickening agent, 0.8% of defoaming agent and water which are complemented to 100%.

Example sixteen:

this embodiment is substantially the same as example fourteen, except that:

the active ingredients account for 2 percent of the total mass, and the mass ratio of tetraconazole to flusilazole is 1: 1. the coating comprises 1% of tetraconazole, 1% of flusilazole, 6% of emulsifier, 10% of solvent, 3% of antifreezing agent, 0.1% of thickening agent, 0.1% of defoaming agent and water which are added to 100% in percentage by weight.

Example seventeen:

this embodiment is substantially the same as example fourteen, except that:

the effective components account for 50 percent of the total mass, the mass ratio of tetraconazole to flusilazole is 25: 25. according to the weight percentage, the coating comprises 25% of tetraconazole, 25% of flusilazole, 9% of emulsifier, 16% of solvent, 6% of antifreezing agent, 0.5% of thickening agent, 0.2% of defoaming agent and water which are complemented to 100%.

Example eighteen:

this embodiment is substantially the same as example fourteen, except that:

the effective components account for 14 percent of the total mass, and the mass ratio of tetraconazole to flusilazole is 4: 10. comprises the following components in percentage by weight: 4% of tetraconazole, 10% of flusilazole, 5% of emulsifier, 15% of solvent, 4% of antifreezing agent, 0.1% of thickening agent, 0.4% of defoaming agent and water, wherein the balance is up to 100%.

Example nineteenth:

this embodiment is substantially the same as example fourteen, except that:

the active ingredients account for 20 percent of the total mass, the mass ratio of tetraconazole to flusilazole is 10: 10. comprises the following components in percentage by weight: 10% of tetraconazole, 10% of flusilazole, 1% of emulsifier, 15% of solvent, 1% of antifreezing agent, 2% of thickening agent, 0.5% of defoaming agent and water, wherein the water is added to 100%.

Example twenty:

the sterilization composition containing tetraconazole and flusilazole disclosed in any one of the first to the nineteen embodiments is applied to control banana scab, and the control effect on banana scab is up to 74% at most after the sterilization composition is applied in a field for 7 days; the highest prevention and treatment effect on banana scab reaches 92% after the indoor drug is used for 10 days.

Experiment one:

through field experiments, the indoor efficacy comparison result of the sterilization composition containing tetraconazole and flusilazole for preventing and treating banana scab is as follows:

conclusion and analysis of the above experiment:

the embodiment and the experimental result show that the inhibition rate of the bactericidal composition containing tetraconazole and flusilazole to banana scab is obviously superior to that of the comparative example.

Experiment two:

through field experiments, the field efficacy comparison result of the sterilization composition containing tetraconazole and flusilazole for preventing and treating banana scab is as follows:

conclusion and analysis of the above experiment:

the bactericidal composition containing tetraconazole and flusilazole provided by the invention has a better control effect on banana scab than a comparative example. Through the observation of the whole experiment process, the compound bactericide has better safety to bananas under the corresponding dilution multiple concentration, has no adverse effect on the growth of the bananas and has no phytotoxicity.

The present invention is not limited to the above-described embodiments, and those skilled in the art will be able to make various modifications without creative efforts from the above-described conception, and fall within the scope of the present invention.

Claims (10)

1. The bactericidal composition containing tetraconazole and flusilazole is characterized by comprising effective components and auxiliaries, wherein the effective components account for 2% -50% of the total mass, the effective components comprise tetraconazole and flusilazole, and the mass ratio of the tetraconazole to the flusilazole is (1-25): (1-25).

2. The bactericidal composition containing tetraconazole and flusilazole according to claim 1, wherein the active ingredients account for 2% -30% of the total mass, and the mass ratio of the tetraconazole to the flusilazole is (1-15): (1-15).

3. The bactericidal composition containing tetraconazole and flusilazole according to claim 1, wherein the bactericidal composition is one of a suspending agent, a microemulsion or an aqueous emulsion.

4. The bactericidal composition containing tetraconazole and flusilazole according to claim 3, wherein the bactericidal composition is a suspending agent and comprises the following components in percentage by weight: 1-25% of tetraconazole, 1-25% of flusilazole, 1-6% of dispersing agent, 1-5% of wetting agent, 4-6% of antifreezing agent, 0.1-2% of thickening agent, 0.1-1% of defoaming agent, 0.1-1% of preservative, 0.5-2% of structure regulator and water, wherein the balance is up to 100%.

5. The bactericidal composition containing tetraconazole and flusilazole according to claim 3, wherein the bactericidal composition is a microemulsion and comprises the following components in percentage by weight: 1-25% of tetraconazole, 1-25% of flusilazole, 5-20% of emulsifier, 10-20% of solvent, 1-6% of antifreezing agent, 0.1-1% of defoaming agent and water, wherein the balance is up to 100%.

6. The bactericidal composition containing tetraconazole and flusilazole according to claim 3, wherein the bactericidal composition is an aqueous emulsion and comprises the following components in percentage by weight: 1-25% of tetraconazole, 1-25% of flusilazole, 1-10% of emulsifier, 10-20% of solvent, 1-8% of antifreezing agent, 0.1-2% of thickening agent, 0.1-0.8% of defoaming agent and water, wherein the balance is up to 100%.

7. The bactericidal composition containing tetraconazole and flusilazole as claimed in claim 4, wherein the dispersing agent is one or more of polycarboxylate, glycerol fatty acid ester polyoxyethylene ether, alkylphenol polyoxyethylene ether formaldehyde condensate, calcium lignosulfonate, naphthalenesulfonate and diphenyl phenol polyoxyethylene polyoxy-formaldehyde condensate;

the wetting agent is one of alkylphenol polyoxyethylene phosphate, polyoxyethylene polyoxypropylene block copolymer and alkylphenol polyoxyethylene.

8. The bactericidal composition containing tetraconazole and flusilazole as claimed in any one of claims 4 to 6, wherein the antifreezing agent is one or more of ethylene glycol, propylene glycol, glycerol, polyethylene glycol, urea and sorbitol;

the thickening agent is one or more of xanthan gum, sodium carboxymethylcellulose, polyvinyl alcohol, guar gum and sodium alginate;

the defoaming agent is one or more of n-butyl alcohol, polydimethylsiloxane, trialkyl melamine and lauric acid;

the preservative is one of cason, benzoic acid and sodium benzoate;

the structure regulator is one or more of kaolin, diatomite, bentonite, white carbon black and magnesium aluminum silicate.

9. The bactericidal composition containing tetraconazole and flusilazole as claimed in any one of claims 5 to 6, wherein the solvent is one or more of methanol, ethanol, butanol, propylene glycol, glycerol, polyethylene glycol, acetone, cyclohexanone, pyrrolidone, toluene, xylene, ethyl acetate, sec-butyl acetate, decalin, petroleum ether and pine-based vegetable oil;

the emulsifier is one or more of alkylphenol polyoxyethylene ether formaldehyde condensate, alkylphenol polyoxyethylene ether phosphate, diphenyl phenol polyoxyethylene polyoxypropylene ether, styrol polyoxyethylene ether, diphenyl phenol polyoxyethylene polyoxy-formaldehyde condensate, agricultural milk 300#, agricultural milk 500#, agricultural milk 600#, agricultural milk 700#, agricultural milk 0201B, agricultural milk 0203B and methylene dinaphthalene sodium sulfonate.

10. The use of the fungicidal combination containing tetraconazole and flusilazole of any one of claims 1 to 9 for preventing and treating banana scab.