94 results about "Benthiavalicarb-isopropyl" patented technology

The present invention is to provide a composition for preventing plant diseases which comprises at least Component I and Component II, is capable of obtaining a synergic effect that cannot be expected with each single component, is capable of markedly increasing a control effect in a much smaller amount of chemicals against various plant pathogens, and causes no phytotoxicity suffering.A composition for preventing plant diseases comprises Components I and II as active ingredients. The Component I is (RS)—N-[2-(1,3-dimethylbutyl)thiophen-3-yl]-1-methyl-3-tri fluoromethyl-1H-pyrazole-4-carboxamide. As the Component II, there can be exemplified, for example, tetraconazole, flutriafol, imibenconazole, triadimefon, simeconazole, oxpoconazole fumarate, prothioconazole, bupirimate, spiroxamine, metiram, dodine, anilazine, chlozolinate, oxycarboxin, ethaboxam, iprovalicarb, pyrazophos, fluoroimide, diflumetorim, fenhexamid, famoxadone, fenamidone, cyazofamid, zoxamide, cyflufenamid, boscalid, benthiavalicarb-isopropyl, picoxystrobin, pyraclostrobin, fluoxastrobin or dimoxystrobin.

The invention relates to a sterilization compound containing ZJ0712. The effective components comprise ZJ0712 (A) and any one (B) selected from fluazinam, fluopicolide and benthiavalicarb-isopropyl, wherein the weight ratio of A to B is 100:1 to 1:100, and the weight percentage of the active component in the compound is 5-80 percent. The compound can be prepared into any preparation allowable in agriculture, and better preparation forms include suspending agent, wettable powder, water dispersible granules and the like. The sterilization compound is suitable for farmlands, orchards and the like and is used for preventing and treating multiple plant diseases of downy mildew and epidemic diseases of crops such as corns, vegetables, fruit trees, flowers and the like.

A plant pathogen control composition that contains at least ingredient (I) and ingredient (II), realizing a synergistic effect unexpectable from each individual of the ingredients, and that attains a striking enhancement of control efficacy to a wide spectrum of plant pathogens with low dosage, being free from phytotoxicity. There is provided a plant pathogen control composition comprising ingredient (I) and ingredient (II) as active ingredients. The ingredient (I) is (RS)-N-[2-(1,3-dimethylbutyl)thiophen-3-yl]-1-methyl-3-trifluloromethyl-1H-pyrazole-4-carboxamide. As the ingredient (II), there can be mentioned tetraconazole, flutriafol, imibenconazole, triadimefon, simeconazole, oxpoconazole fumarate, prothioconazole, bupirimate, spiroxamine, metiram, dodine, anirazine, chlozolinate, oxycarboxin, ethaboxam, iprovalicarb, pyrazophos, fluoroimide, diflumetorim, fenhexamide, famoxadone, fenamidone, cyazofamid, zoxamide, cyflufenamide, boscalid, benthiavalicarb-isopropyl, picoxystrobin, pyraclostrobin, fluoxastrobin or dimoxystrobin.

The invention relates to a disinfectant composition formed by using benthiavalicarb-isopropyl and propamocarb as main ingredients and adding addition agent as well as filler carriers. The composition has the advantages of special effects on preventing and curing the propamocarb disease for various crops, fruits and fruit trees, simple processing technique, no three wastes and convenient use.

The invention discloses a benthiavalicarb isopropyl containing bactericidal pesticide composite and application of the composite, and aims at solving the problem that the drug resistance of plants is generated and is gradually poor in prevention and control effect on diseases as a traditional pesticide used for tobacco black shank, cucumber downy mildew and tomato late blight already is high in dose and used for long term. The bactericidal pesticide composite comprises benthiavalicarb isopropyl and aliette. The bactericidal pesticide composite disclosed by the invention can effectively reduce the application amount of single doses, reduce the production cost, enlarge the bactericidal spectrum and prolong the drug resistance of the plants through the compatibility of components, can be used for preventing and controlling crops (which include vegetables, fruit trees, Chinese herbal medicines, flowers, cotton, hemps, oil materials, and the like) pestilence and the downy mildew, can also be used for preventing and controlling the tobacco black shank, is obviously superior to the single doses of the two drug components, namely the benthiavalicarb isopropyl and the aliette, in effect and has a relatively high application prospect and a relatively high popularization value.

The invention discloses an agricultural bactericidal composition for prevention and treatment of downy mildew and eqpidemic diseases. The bactericidal composition comprises two active components of a first active component and a second active component, wherein the first active component is fluopicolpkd (having a structural formula is shown in the patent specification), and the second active component comprises one or more of propineb, cymoxanil, dimethomorph, flumorph, chlorothalonil, metalaxyl, fluazinam, fluopicolide and benthiavalicarb-isopropyl. A weight ratio of the first active component to the second active component is in a range of (50: 1) to (1: 50). The bactericidal composition disclosed by the invention has the advantages of good bactericidal effects, low pharmacy cost, safety on crops, and good effects of prevention and treatment of downy mildew and eqpidemic diseases of melons, fruit trees and vegetables.

The invention discloses a seed coating containing benfuracarb, and particularly relates to the technical field of combination of pesticides. The seed coating is characterized by comprising two effective components A and B, wherein the component A is benfuracarb; the component B is at least one of fludioxonil, metalaxyl-m, tebuconazole, azoxystrobin, difenoconazole, pyraclostrobin, metconazole, kresoxim-methyl, trifloxystrobin, fluoxastrobin, benthiavalicarb-isopropyl, quinoxyfen, penthiopyrad, prothioconazole, silthiopham, orysastrobin, epoxiconazole, triticonazole and thifluzamide; the ratio of the effective components A and B in the seed coating in parts by weight is (1:35) to (25:1); the total parts of the effective components by weight account for 0.1%-60% of total parts of the overall preparation by weight; the balance is auxiliary components. The low-toxicity benfuracarb is taken as a main component of a pesticide; an efficient, broad-spectrum, low-toxicity and environment-friendly novel pesticide or a compound is taken as a main fungicidal ingredient; and the seed coating has significant prevention and treatment effects on plant diseases and insect pests.

The invention discloses a sterilization composition containing benthiavalicarb isopropyl and bactericide for preventing and treating oomycetes, comprising a first active ingredient benthiavalicarb isopropyl and a second active ingredient which is one selected from bactericides for preventing and treating oomycetes, such as phosethyl-aluminium, cymoxanil, dimethomorph, benalaxyl, cyazofamid, fluopicolide, iprovalicarb and oxadixyl, wherein weight ratio of the first active ingredient to the second active ingredient is 0.05-5. The sterilization composition disclosed by the invention can be prepared into agriculturally allowable water dispersible granules, wettable powder or suspending agent. The sterilization composition disclosed by the invention is reasonable in components, good in sterilization effect and low in medication cost, and activity and sterilization effect of the sterilization composition are not simple addition of activities of each component; and compared with the existing single preparation, the sterilization composition disclosed by the invention has obvious synergistic effect besides obvious sterilization effect, is low in the medication cost, produces no pollution to crops, has good safety and accords with safety requirements of pesticide preparation, so that the sterilization composition disclosed by the invention has obvious control effect to downy mildew and epidemic disease of the crop.

The invention relates to a fungicidal composition containing flumorph, of which the effective component is one of flumorph (A) and iprovalicarb, benthiavalicarb-isopropyl and propamocarb (B), the mass ratio of A and B is between 100:1 and 1:100, and the mass percentage of the active components in the composition is 20-80%. The composition can be prepared to suspending agent, wettable powder and water dispersing granule. The fungicidal composition can be applied in the farmland and orchard and is used for preventing various plant diseases, particularly the downy mildew and epidemic disease on the crops such as grain, vegetables, fruit tree and flowers.

The invention discloses a benthiavalicarb isopropyl containing bactericidal composition. An effective active ingredient is composed of a first active ingredient and a second active ingredient, wherein the first active ingredient is benthiavalicarb isopropyl, the second active ingredient is selected from strobilurin fungicide azoxystrobin, kresoxim-methyl, metominostrobin, fluoxastrobin, picoxystrobin or coumoxystrobin, the weight ratio of the first active ingredient to the second active ingredient is (1:10)-(8:1), preferably (1:8)-(5:1). The composition can be prepared into agriculturally allowable water dispersible granules, wettable powder and suspending agent dosage forms. The bactericidal composition disclosed by the invention is reasonable in ingredients, good in bactericidal effect and low in medicine application cost, and the activity and bactericidal effect of the bactericidal composition are not the simple combination of the activities of ingredients, so that compared with the existing single preparations, the bactericidal composition not only has a significant bactericidal effect but also has a significant synergistic effect, is low in medicine application cost and good in safety, has no pollution to crops, and conforms to the safety requirements of pesticide preparations. The bactericidal composition disclosed by the invention has a significant control effect on downy mildew, powdery mildew, rice blast and sheath blight of crops.

The invention relates to a bactericide composition prepared by an auxiliary agent and a packing material carrier. The bactericide composition takes benthiavalicarb-isopropyl and propamocarb as the principal components and has special effects for preventing and controlling the downy mildew diseases of various crops, fruits and fruit trees. The composition has the advantages of simple production technique, no discharge of three wastes and convenient use.

The invention relates to a bactericidal composition containing fluopicolide and benthiavalicarb-isopropyl. The bactericidal composition comprises the effective ingredients of fluopicolide and benthiavalicarb-isopropyl in binary compound, wherein the weight ratio of the fluopicolide to the benthiavalicarb-isopropyl is (1-40) to (40-1); the total mass of the effective ingredients fluopicolide and benthiavalicarb-isopropyl in the preparation is 1-80% of the mass of the entire preparation; and the others are auxiliary ingredients which are permitted to be used and accepted in pesticides. The dosage form of the bactericidal composition is missible oil, a suspending agent, wettable powder, a water dispersible granule, emulsion in water and microemulsion; and late blight of potatoes and tomatoes, plasmopara uiticola, downy mildew of cucurbits and parasitic downy mildew can be effectively controlled.

The invention discloses a bactericide composition containing polyoxins and benthiavalicarb isopropyl and belongs to the technical field of pesticide. Based on active components, the weight ratio of the polyoxins to the benthiavalicarb isopropyl is 1:10-10:1. The bactericide composition further comprises an additive and filler, wherein the polyoxins and the benthiavalicarb isopropyl occupy 5%-60% of the total weight of the bactericide, the additive occupies 5%-30% of the total weight of the bactericide, and the rest is the filler. Through actual tests, the bactericide has obvious control efficiency on wheat scab. Compared with a conventional wheat scab bactericide, the composite bactericide has the following advantages that compared with a single bactericide, the bactericide composition has the obvious synergistic effect on the wheat scab and can obviously improve the control efficiency; can replace parts of intermediately and highly toxic bactericides, reduce dosage, lower environment pollution and residuals in agricultural products and delay pesticide resistance of the wheat scab to the single bactericide, is long in lasting period, and can reduce cost compared with a single medicament.

The present invention is to provide a composition for preventing plant diseases which comprises at least Component I and Component II, is capable of obtaining a synergic effect that cannot be expected with each single component, is capable of markedly increasing a control effect in a much smaller amount of chemicals against various plant pathogens, and causes no phytotoxicity suffering.A composition for preventing plant diseases comprises Components I and II as active ingredients. The Component I is (RS)—N—[2-(1,3-dimethylbutyl)thiophen-3-yl]-1-methyl-3-tri fluoromethyl-1H-pyrazole-4-carboxamide. As the Component II, there can be exemplified, for example, tetraconazole, flutriafol, imibenconazole, triadimefon, simeconazole, oxpoconazole fumarate, prothioconazole, bupirimate, spiroxamine, metiram, dodine, anilazine, chlozolinate, oxycarboxin, ethaboxam, iprovalicarb, pyrazophos, fluoroimide, diflumetorim, fenhexamid, famoxadone, fenamidone, cyazofamid, zoxamide, cyflufenamid, boscalid, benthiavalicarb-isopropyl, picoxystrobin, pyraclostrobin, fluoxastrobin or dimoxystrobin.

The invention discloses a bactericidal composition with an effective active ingredient composed of benthiavalicarb isopropyl and captan at weight ratio of (1:20)-(10:1), preferably (1:10)-(5:1). The composition can be compounded to agriculturally allowable water dispersible granule, wettable powder or suspending agent. The composition has the advantages of reasonable component, good bactericidal effect and low pesticide utilization cost, and the activity and sterilizing effect are not the simple superposition of the activity of all components. Compared with a single preparation agent, besides the remarkable sterilizing effect, the composition also has the advantages of remarkable synergistic effect, low pesticide utilization cost, zero contamination for plants and good safety, and meets safety requirements of pesticide preparation agent. The composition also has remarkable prevention and cure effects for false mildew, powdery mildew and anthracnose of the crops.

The invention relates to a sterilizing combination containing benthiavalicarb-isopropyl and cyazofamid. An effective element of the sterilizing combination is made by compound of benthiavalicarb-isopropyl and cyazofamid, wherein the mass ratio of benthiavalicarb-isopropyl and cyazofamid is 1-40:40-1, the mass friction ratio of the effective elelments of benthiavalicarb-isopropyl and cyazofamid in a preparation is 1%-80%, the others are auxiliary parts permitted and accepted in pesticide, the sterilizing composition is in forms of missible oil, suspending agents, wettable powder, water dispersible granules, emulsion in water, microemulsion, granules and capsules. The sterilizing combination is mainly used for downy mildew, epidemic diseases, clubroot, damping off and the like, and is used for bacterium prevention and control of potatoes, grapes, vegetables (cucumbers, cabbages, tomatoes, onions and lettuces) and lawn.

A humic acid, boron and magnesium chelated insecticide-fertilizer comprises the following components in parts by weight: 20-30 parts of urea, 10-15 parts of diammonium hydrogen phosphate, 10-15 parts of potassium sulfate, 22-25 parts of humic acid, 1-2 parts of ammonium borate, 1-2 parts of magnesium sulfate, 1-1.5 parts of benthiavalicarb-isopropyl and 0.5-1 part of dinotefuran. Ammonium borate, magnesium sulfate and humic acid are added into a reactor and then added with water to react at 80-90 DEG C, as a result, a boron and magnesium chelation fertilizer solution is prepared; benthiavalicarb-isopropyl and dinotefuran are added into the boron and magnesium chelation fertilizer solution to obtain a pesticide chelation fertilizer mixed solution; urea, potassium sulfate and diammonium phosphate are mixed and added into a pelletizer and made into pellets after being sprayed with the pesticide chelation mixed solution, so as to the humic acid, boron and magnesium chelated insecticide-fertilizer. The humic acid, boron and magnesium chelated insecticide-fertilizer is rich in nutrition and high in utilization ratio of elements B and Mg, and not only can provide required nutrition to plants, but also has effect of insect killing, thereby effectively improving the yield of crop.

The invention discloses a sterile composition containing boscalid and benthiavalicarb isopropyl. The sterile composition comprises the boscalid and the benthiavalicarb isopropyl as effective ingredients, wherein the weight percent of the effective ingredients in the sterile composition is 5-80%, and the weight percent ratio proportion of the effective ingredients is (50:1)-(1:50), preferably, (20:1)-(1:20). The sterile composition disclosed by the invention achieves obvious synergistic effect after the boscalid and the benthiavalicarb isopropyl are compounded; the field dosage can be reduced greatly, the pesticide residue and environment pollution are reduced, and the production cost and the use cost are reduced; the single selection pressure on pathogenic bacteria is reduced to better prevent the generation of disease resistance and slow the generation speed of disease medicine resistance; and the sterile composition is mainly applied to the prevention and treatment of crops botrytis and downy mildew.

The invention relates to a bactericidal composition containing difenoconazole and benthiavalicarb-isopropyl. The bactericidal composition comprises active components and agriculturally useable and acceptable auxiliary components, wherein the effective components are difenoconazole and benthiavalicarb-isopropyl which are in binary compounding, the mass ratio of the difenoconazole to benthiavalicarb-isopropyl is (1-40): (40-1), the mass fraction ratio of difenoconazole and benthiavalicarb-isopropyl in the preparation is 1%-80%. The formulation form of the bactericidal composition provided by the invention can be emulsifiable oil, suspending agent, wettable powder, water dispersible granule, emulsion in water, micro emulsion, granules and micro capsule, and the bactericidal composition can be used for effectively preventing and controlling late blight, downy mildew, scab, anthrachose of grape, white rot, alternaria leaf spot, powdery mildew, brown spot, rust disease, yellow rust, gibberellic disease and the like, and has good effect on anthracnose and white rot on the grape.

The invention relates to a pesticide composition containing valifenalate and application thereof. Effective components of the pesticide composition comprise a component A and a component B, wherein the component A is the valifenalate and the component B is selected from one of benthiavalicarb-isopropyl, fluopicolide, fluazinam and mandipropamid; the weight part ratio of the component A to the component B ranges from (30 to 1) to (1 to 30). The composition provided by the invention can be used for preparing agriculturally acceptable missible oil, a suspension agent, water dispersible granules, wettable powder and emulsion in water. According to the pesticide composition, the effective components are reasonably matched, the activity and the sterilization effect of the composition are not simple superposition of the activity of all the components and the compound synergistic effect is remarkable; the usage amount of the effective components of a compound medicament chemical agent is remarkably reduced when being compared with that of single utilization of the effective components. The pesticide composition containing the valifenalate, provided by the invention, is suitable for preventing and controlling diseases caused by oomycete pathogenic bacteria, especially phytophthora capsici leonian, phytophthora infestans and downy mildew of various crops.

The invention relates to a bactericidal composition containing enostroburin and carbamates compounds, comprising an active component A and an active component B. The active component A is selected from enostroburin, and the active component B is one selected from the group consisting of propamocarb, propamocarb hydrochloride, diethofencarb and benthiavalicarb-isopropyl, wherein the weight ratio of effective active component A to effective active component B is in a range of 60:1 to 1:60. After added with auxiliary agents and excipients, the effective active components can be prepared into wettable powder, water dispersible granule, suspending agents, suspending emulsion, emulsion in water and micron emulsion. The bactericidal composition provided in the invention can be used for the prevention and treatment of a plurality of diseases like powdery mildew, botrytis, downy mildew, rust, drooping disease, eqpidemic disease, late blight, stem rot, peniciliosis, damping off, black shank, scab and leaf spot, has a significant synergy effect, is safe to crops, and has the advantages of resistance to rain wash, lasting drug effects and small dose of drugs.

The invention discloses a fungicidal composition containing boscalid and benthiavalicarb-isopropyl and application of the fungicidal composition. Boscalid and benthiavalicarb-isopropyl serve as main active ingredients of the fungicidal composition, wherein the weight ratio of boscalid to benthiavalicarb-isopropyl is (1-70):(1-50). The fungicidal composition can be applied to control over diseases of cereals, fruit trees and vegetables, has a high synergistic effect, overcomes and delays the pesticide resistance of fungi, and is high in fungicidal speed, long in lasting period, capable of reducing application cost and obviously superior to single dosages in control effect.

The invention discloses a preparation method of a full-effect selenium-containing slow-release drug fertilizer. The preparation method comprises the following steps: adding benfuracarb, sodium selenite and zeolite powder into a granulating machine to perform granulation so as to obtain a drug fertilizer basic core; adding urea into distilled water, adding a sodium hydroxide solution to adjust the pH value, adding formaldehyde for reaction, adding ammonium dihydrogen phosphate, adjusting the pH value by using phosphoric acid, and reacting continuously to obtain urea formaldehyde compound phosphorus; and adding the drug fertilizer basic core into the granulating machine, and performing granulation by using a mixture containing urea formaldehyde compound phosphorus, lignin, sodium selenite and benthiavalicarb-isopropyl, thereby obtaining the full-effect selenium-containing slow-release drug fertilizer. The preparation method disclosed by the invention has the advantages that the process is reasonable, an effect of long-acting relief is achieved, the utilization ratios of pesticides and fertilizers can be improved, selenium and a drug fertilizer are organically combined, and inorganic selenium is absorbed and converted by crops and becomes biological organic selenium enriched in agricultural products.

The invention discloses an analysis method for the contents of active components in a benthiavalicarb isopropyl.dimethomorph compound preparation. The analysis method comprises the following steps of: utilizing a silica gel column with the column length of 250 mm and the column diameter of 4.6 mm, and taking methanol-water solution with the volume fraction of 35-55% as a mobile phase, wherein the flow velocity is 0.8-1.2 mL / min, and the column temperature is 10-50 DEG C; carrying out quantitative analysis on benthiavalicarb isopropyl and dimethomorph which are active components in the compound preparation by utilizing an ultraviolet detector or a diode array detector and a high performance liquid chromatography (HPLC) method, wherein the detection wavelength is 240-260 nm. The method has the advantages that the precision is high, the reproducibility is good, the accuracy is high and the repetitiveness is good; a basis is provided for the quantitative analysis of the active components in the benthiavalicarb isopropyl.dimethomorph compound preparation; the method has an important practical value for the application of the benthiavalicarb isopropyl.dimethomorph compound preparation in agricultural production practice.

The invention provides a compound composition containing methanesulphonyl myclobutanil and carbamic acid ester bactericide and a preparation. The active ingredients of the compound composition comprise A and B, wherein A is methanesulphonyl myclobutanil, and B is an active bactericidal compound selected from carbamic acid ester bactericide propamocarb hydrochloride, diethofencarb, benthiavalicarb-isopropyl and iprovalicarb, wherein the chemical name of methanesulphonyl myclobutanil is 2-(p- fluorophenyl)-5-methylsulfonyl-1, 3, 4-oxadiazole. After additives or carriers are added, the compound composition can be prepared into such dosage forms as wettable powder, water dispersible granules, suspension, emulsion in water, granules and seed coating. The active ingredients A and B are compounded to have an obvious synergistic effect and can effectively prevent and treat various bacterial diseases and various fungal diseases, and the compound composition has the effects of strengthening the synergistic effect, expanding the disease prevention and treatment spectrum, alleviating the drug resistance and reducing the production cost.

The invention relates to a bactericidal composition containing active ingredients of benthiavalicarb isopropyl and azoxystrobin in a weight ratio of 2:1. The composition is mainly used for controlling downy mildew, has good control effect and is a bactericide worth popularization.

The invention relates to a sterilization composition containing benthiavalicarb isopropyl and prothioconazole. An effective component of the sterilization composition consists of the benthiavalicarb isopropyl and the prothioconazole which are mixed; the mass ratio of the benthiavalicarb isopropyl to the prothioconazole is (1-50): (50-1); the total mass of the benthiavalicarb isopropyl and the prothioconazole accounts for 1-80 percent of the mass of the effective component, and the effective component comprises the balance of agriculturally available and acceptable auxiliary components. The sterilization composition can be made into missible oil, a suspending agent, wettable powder, a water dispersible granule, an emulsion in water, a microemulsion, granula and microcapsule and can effectively control the late blight of potatoes and tomatoes, the downy mildew of grapes, the downy mildew of melons and the powdery mildew of wheat and barley.

A sterilization composition containing picarbutrazox and an amide type sterilizing agent and applications thereof are disclosed. Effective active components include a first active component that is the picarbutrazox and a second active component that is one of cuppricnonylphenolsulfonate, benthiavalicarb-isopropyl, valifenalate and hymexazol. The weight ratio of the first active component to the second active component is 1:80-60:1, preferably 1:60-40:1. The composition can be prepared into agriculturally acceptable dosage forms including wettable powder, water dispersible granules, suspensions, suspoemulsions, emulsions in water, microemulsions, micro-capsule suspensions, micro-capsule suspension-suspension agents, dispersible oil suspensions, and dry type suspensions. The composition has reasonable components and good sterilizing effects. Activity and sterilization effects of the composition are not simple sums of those of each component. Compared with single preparations at present, the composition has significant sterilizing effects and significant synergistic effects and is high in safety to crops. The composition has significant control effects on crop downy mildew and epidemic disease.

A provided sterilization composition with synergic effect comprises an active component A and an active component B with the mass ratio of 1:50 to 50:1; the active component A is polyhexamethylene biguanidine or its agriculturally-acceptable salt compounds; and the active component B is one selected from cyprodinil, epoxiconazole, benthiavalicarb-isopropyl, zoxamide, azoxystrobin, prothioconazole, difenoconazole, fenamidone, polyoxin, iprodione, acibenzolar, dithianon, pyraclostrobine, trifloxystrobin, picoxystrobin, fluazinam, thifluzamide and dimethomorph. Test results show that the provided above sterilization composition is obvious in synergic effect, and more importantly, the usage amount is less and the usage cost is reduced. By compounding sterilization agents with different action mechanisms and action manners, the usage amount of a single sterilization agent is effectively reduced, and extremely good effect is provided for expanding sterilization spectrum, delaying fungi resistance, improving controlling effect and other aspects.

The invention relates to the technical field of pesticide compounding, in particular to an amisulbrom and benthiavalicarb-isopropyl containing bactericidal composition and application thereof. The bactericidal composition comprises active ingredients including amisulbrom and benthiavalicarb-isopropyl in the mass ratio of 1:10 to 10:1, and the bactericidal composition comprises the following ingredients in percentage by mass: 1%-60% of amisulbrom and benthiavalicarb-isopropyl, and the balance of auxiliary ingredients which are allowed and accepted in pesticides. The bactericidal composition is in a form of wettable powder, suspending agent, emulsion in water, water dispersible granule or microemulsion and can effectively prevent and control diseases, such as downy mildew and epidemic disease, of vegetables, grapes, litchi fruits and melons.