321 results about "Bacteriocidal Agents" patented technology

To provide a novel pest control agent composition, particularly a bactericidal composition.SOLUTION: A bactericidal or bacteriostatic composition comprising an active ingredient A selected from pyrazole compounds or salts thereof represented by formula (I): [G represents G-1; G1 represents C1-C6 haloalkyl or the like; T represents an oxygen atom or the like; RX represents C1-C6 alkyl or the like; RY represents a hydrogen atom or the like; R1 represents a hydrogen atom or the like; R2 represents a hydrogen atom or the like; R3 represents a hydrogen atom or the like; Ra represents a hydrogen atom or the like; Z represents Z-1 or the like; Z1 represents C1-C6 alkyl or the like; m5 and n5 each represent an integer of 0, 1, 2, 3, 4, or 5; and p represents an integer of 0 or 1] and an active ingredient B selected from known bactericidal or bacteriostatic compounds.SELECTED DRAWING: None

The invention relates to the technical field of reverse osmosis membrane maintenance, in particular to a cleaning scale inhibitor special for a reverse osmosis membrane and application of the cleaning scale inhibitor. The cleaning scale inhibitor provided by the invention comprises an agent A, an agent B and an agent C, the agent A comprises the following components in percentage by mass: 10-20% of organic phosphonic acid, 10-20% of polycarboxylic acid polymer, 5-10% of sulfamic acid, 3-8% of sodium gluconate and the balance of water; the agent B comprises 8-15% of an isothiazolinone bactericide, 5-10% of a nonionic surfactant, 3-8% of a chlorine bactericide, 2-5% of sodium dodecyl benzene sulfonate and the balance of water; and the agent C comprises 10-20% of sodium polyacrylate, 8-15% of sodium hexametaphosphate, 5-10% of citric acid, 3-8% of silicate and the balance of water. The cleaning scale inhibitor provided by the invention has an efficient cleaning effect on various pollutants, is environment-friendly, and does not cause chemical damage to a reverse osmosis membrane.

The invention discloses a novel bradyrhizobium strain SBM1 as well as a preparation and application thereof, and belongs to the technical field of microorganisms. The novel bradyrhizobium strain SBM1 disclosed by the invention is preserved in the China General Microbiological Culture Collection Center (CGMCC), and the preservation number is CGMCC No.29121. The strain has good tolerance to herbicides, bactericides and insecticides, and is high in nodulation and nitrogen fixation capacity, wide in symbiotic spectrum and remarkable in nitrogen-saving and high-yield-promoting capacity. Under the field planting condition that the application amount of nitrogen fertilizer is reduced by 50%, the strain can remarkably improve the nitrogen fixation and growth performance of crops, so that a strain source is provided for obtaining a rhizobium inoculant suitable for planting various varieties of peanuts, the application amount of the nitrogen fertilizer is reduced, normal implementation of crop pesticides is guaranteed, and the economic benefit is increased. The important significance is realized on the increase of the crop yield.

The invention is suitable for the technical field of agricultural bactericides, and provides application of an echinocandin antifungal drug in prevention and treatment of agricultural diseases. According to the present invention, the two common echinocandin antifungal drugs such as the anidulafungin and the Rezafungin acetate, which are common in the field of medicine, are firstly applied to prevention and control of crop diseases; prevention and control tests are carried out on crop fungal diseases such as sclerotiniose, corn southern leaf blight, tomato gray mold, rice blast and crop anthracnose, and results show that the two drugs can significantly inhibit the growth of pathogenic fungal hyphae, and compared with an existing agricultural commercial bactericide carbendazim, the bactericidal composition shows higher inhibitory activity and has the characteristics of high efficiency and low toxicity. The invention lays a foundation for deep research and application of echinocandin drugs in the agricultural field, has a wide market prospect, effectively improves the crop disease prevention and control level, and promotes grain yield increase and quality safety.

The invention discloses a disinfection tank for wastewater treatment, and belongs to the field of wastewater treatment.The disinfection tank comprises a disinfection tank body, and a liquid inlet device is fixedly installed on one side of the disinfection tank body; the rapid decomposition assembly comprises a heating plate fixedly mounted on the bottom wall of an inner cavity of the disinfection tank, a square rod is rotatably mounted on the bottom wall of the inner cavity of the disinfection tank, a sleeve frame sleeves the outer side of the square rod, a cylinder is rotatably mounted on the top wall of the inner cavity of the disinfection tank, a reciprocating screw rod is arranged in an inner cavity of the cylinder, and a rotating shaft is arranged in the inner cavity of the cylinder; the reciprocating screw rod is rotatably mounted with the disinfection tank and the cylinder, and a movable plate is slidably mounted in an inner cavity of the cylinder; according to the sterilizing tank, wastewater and a sterilizing agent in the sterilizing tank can be uniformly heated, and the process of decomposing the sterilizing agent into active ingredients can be accelerated by combining heating with efficient mixing, so that the residual sterilizing agent which is not completely reacted and the generation of potential pollutants are reduced, and the sterilizing efficiency is further improved.

The invention discloses a method for detecting drug resistance of botrytis cinerea to succinate dehydrogenase (SDHI) bactericides. On the basis of an RPA-CRISPR / Cas12a system, a specific primer pair amplification target fragment and crRNA for activating Cas12a trans-cleavage activity are designed aiming at key mutation sites related to drug resistance in a bactericide action target SdhB gene, so that fluorescent light visible to naked eyes can be generated only when a resistant strain sequence is matched with the crRNA, and the fluorescent light is opposite to the fluorescent light generated when a sensitive strain sequence is matched with the crRNA. The method provided by the invention overcomes the dependence on laboratories and large instruments in the traditional drug resistance detection method, provides key technical support for accurate prevention and control and drug resistance management of grape gray mold, and provides direct drug use basis for scientific prevention and control in the field.

The invention belongs to the technical field of agricultural microorganisms, and discloses a bacillus flexus strain BJ699 and application thereof in strawberry production. Specifically, the invention provides a novel bacillus flexus strain BJ699, and the preservation number of the strain BJ699 in the China Center for Type Culture Collection is CCTCC (China Center for Type Culture Collection) NO: M20252013. The invention also provides a microbial agent containing the strain BJ699 as an active component and application of the strain BJ699 in preparation of a microbial agent for prevention and control of strawberry root rot pathogenic bacteria and / or degradation of pyraclostrobin. The new strain or the microbial agent containing the strain comes from the natural environment, has no cross resistance to existing bactericides and insecticides, has the advantages of high efficiency, low toxicity, no environmental pollution, low possibility of drug resistance generation and the like, and has a wide application prospect.

The invention relates to the technical field of sewage treatment, in particular to a preparation method of a degradable bactericide for an oil field. According to the invention, a hydroxypropyl guanidine gum-polycaprolactone-ethylenediamine fragment copolymer is taken as a carrier, a methylisothiazolinone quaternary ammonium salt (Q-MIT) bactericide is loaded, and the degradable bactericide for the oil field is obtained by cooperating with a dodecyl ethyl sulfide (TC-SE) bactericide and combining with sodium polyaspartate. A carrier forms a hydrogen bond with a polar group on the surface of a biological membrane through a hydroxypropyl guanidine gum main chain to realize targeted anchoring, a polycaprolactone branched chain encapsulates Q-MIT through a hydrophobic effect, primary amino groups of ethylenediamine are introduced to form a pH sensitive Schiff base bond with Q-MIT, and the primary amino groups and adipic dihydrazide form a thermal response hydrazide bond to construct a dual dynamic covalent bond, so that controlled release of Q-MIT is realized, and the biomembrane is prepared. And moreover, the components of the whole system are connected through degradable chemical bonds, so that the environmental protection property and sustainability of oil field operation are guaranteed.

The invention relates to a synergistic composition for preventing and treating celery root rot. The tannic acid and fludioxonil in the synergistic composition disclosed by the invention show a relatively good synergistic effect in a compounding mass ratio range of (1: 50)-(50: 1). According to the synergistic composition disclosed by the invention, tannic acid with weak bacteriostatic activity on celery root rot and fludioxonil with excellent bacteriostatic activity are compounded for use, so that a remarkable synergistic effect is achieved, the prevention and treatment effect is far higher than that of a single agent, and the synergistic effect is achieved by reducing pesticide. Besides, according to the synergistic composition disclosed by the invention, the plant source tannic acid and the chemical bactericide fludioxonil are compounded for use, and the use amount of chemical agents is reduced, so that the resistance risk of the chemical bactericide is reduced, pesticide residues and ecological environment pollution are reduced, and the synergistic composition has a good application prospect.

The invention relates to the technical field of gastrodia elata cultivation, in particular to a fungus material for gastrodia elata cultivation and a cultivation method.The fungus material contains plants capable of inhibiting pathogenic bacteria causing gastrodia elata tuber rot disease, and the fungus material is composed of, by mass, 58% of sawdust, 30% of cottonseed hulls, 10% of maytenus stems, 1% of gypsum powder, 0.5% of KH2PO4 and 0.5% of MgSO4. The fungus material provided by the invention contains the plant maytenus stems capable of inhibiting pathogenic bacteria causing the gastrodia elata tuber rot disease, the ethanol extract of the maytenus stems can efficiently inhibit the pathogenic bacteria primary verticillium atrophaeum causing the gastrodia elata tuber rot disease, and in addition, the ethanol extract of the maytenus stems has no obvious inhibiting effect on armillaria mellea; the method ensures that a gastrodia elata-armillaria mellea symbiotic system is not interfered, the field experiment control effect is 76.85% when the fungus material is used and a method for spraying the maytenus stem ethanol extract bactericide is combined, and the method has important value for ensuring sustainable development of the gastrodia elata industry.

According to the suspending agent containing the pydiflumetofen and the meconazole, provided by the invention, the defects of a traditional single bactericide are overcome, and the control effect on various plant diseases is improved. According to the suspending agent disclosed by the invention, a natural biological source substance chitosan oligosaccharide is introduced as a thickening agent, so that the prevention and treatment effect of the agent on the rice sheath blight disease can be improved unexpectedly.

The invention relates to the technical field of agricultural plant disease control, and particularly discloses a biological and chemical compound bactericide and application thereof. The biological and chemical compound bactericide comprises a bacterial solution of a biocontrol strain bacillus velezensis LHN1 and a chemical bactericide, the biocontrol strain bacillus velezensis LHN1 is preserved in Guangdong Microbial Culture Collection Center, and the preservation number is GDMCC No: 63550; the chemical bactericide is selected from at least one of prochloraz, pyraclostrobin or tebuconazole; in the compound bactericide, the volume ratio of the LHN1 bacterial liquid to the chemical bactericide is (1: 4)-(4: 1). Through the synergistic effect of biological prevention and control and chemical prevention and control, the problems that a single chemical bactericide pollutes the environment and the single biological prevention and control effect is unstable are solved, the prevention effect in a pot experiment reaches up to 83.99%, meanwhile, the dosage of chemical agents is reduced by 30%-50%, and the method has the advantages of being efficient, low in toxicity and low in cost and is suitable for root rot prevention and control in large-scale planting of rhizoma polygonati.

The invention relates to the technical field of pesticides, in particular to a hydrazide derivative containing a 3, 4-dihydroisoquinoline structure, a preparation method and application. The hydrazide derivative containing the 3, 4-dihydroisoquinoline structure is a compound as shown in a formula (I), or a stereoisomer, a tautomer, an isotope derivative and a pesticide acceptable salt thereof. The hydrazide derivative containing the 3, 4-dihydroisoquinoline structure has broad-spectrum inhibitory activity on phytopathogens such as plant pathogenic fungi, especially has excellent inhibitory activity on basidiomycota and ascomycomycota pathogenic fungi such as gaeumannomyces graminis, physalospora piricola, sclerotinia sclerotiorum, botrytis cinerea and rhizoctonia solani, and has broad-spectrum inhibitory activity. The bactericide is expected to be developed into a novel green bactericide which is efficient, safe, economical and environment-friendly.

The application discloses application of 5,8,11-eicosatrienoic acid in prevention and treatment of plant fungal diseases and belongs to the field of pesticide chemistry. The 5,8,11-eicosatrienoic acid mainly prevents and treats diseases caused by the oomycete class capsicum phytophthora, the compound is a long-chain unsaturated fatty acid, has an antifungal disease effect and can be used as a fungicide to prevent and treat plant diseases. The compound can effectively prevent pathogenic bacteria from invading plants by inhibiting mycelium growth, enhancing cell membrane permeability and interfering with the spore sac release process, and is further used for preventing and treating huge plant fungal diseases. Biological tests show that the compound has a significant concentration-dependent inhibitory effect on the mycelium growth of the capsicum phytophthora, and the half effective inhibitory concentration (EC50) is 60.2 µg / mL. At a concentration of 200 µg / mL, the inhibition rate is more than 83%, the 5,8,11-eicosatrienoic acid can effectively inhibit the release of the capsicum phytophthora spore sac, and the EC50 is 156.3 µg / mL. At a concentration of 200 µg / mL, the inhibition rate is morethan 77%.

The invention relates to the field of agricultural bactericides, in particular to a suspending agent containing fenaminstrobin and validamycin A and application of the suspending agent. The bactericidal composition comprises a suspending agent containing fenaminstrobin and validamycin A, an active component, a stabilizer, an auxiliary agent and water, the active component accounts for 1-70% of the mass of the preparation, and the stabilizer accounts for 0.1-10% of the mass of the preparation; wherein the active ingredients are fenaminstrobin and validamycin A, and the stabilizer is meglumine (N-methyl-D-glucosamine). The suspending agent prepared by the technical scheme of the invention effectively inhibits the increase of the particle size of a sample in the thermal storage process of a preparation, effectively improves the suspension rate of fenaminstrobin after the thermal storage of the preparation, improves the utilization rate of a pesticide, and ensures the normal exertion of the efficacy of the pesticide at the same time. Meanwhile, the quality of the active components of the stabilizer-containing bactericide is stable within the shelf life, the addition of the stabilizer does not cause the decomposition of the active components, and the preparation does not have obvious physical or chemical change.

A living paint comprises a living photosynthetic microorganism, binder, growth medium, and water. The microorganism may comprise algae, cyanobacteria, or lichens. The binder may be composed of primary

The present application relates to a kind of bactericidal liquid agent based on cuprous hydroxide, and its preparation method and use method, with the suspension of cuprous hydroxide as bactericidal liquid agent, can effectively prevent and cure the disease caused by a variety of oomycetes, fungi and / or bacteria, wherein the suspension of cuprous hydroxide is obtained by stirring in water by the solution state cuprous chloride coordination compound decomposition.This bactericidal liquid agent of the present application can be far lower than the existing copper ion bactericide while the single copper dosage is lower, and the prevention and cure range of disease is wider.This not only solves the risk of heavy metal excess residue caused by the existing copper preparation, but also avoids the problem of needing to use multiple bactericides simultaneously to prevent and cure one or more diseases.The bactericidal liquid agent of the present application has important significance for plant disease prevention and cure, and has great application potential in agricultural market.

The invention discloses an antibacterial peptide induced by sulfate reducing bacteria and application of the antibacterial peptide, and belongs to the technical field of marine corrosion protection. The amino acid sequence of the SRB-induced antibacterial peptide is VAHKRLVVGTR, and the SRB-induced antibacterial peptide has efficient antibacterial activity on corrosive bacteria such as SRB and has the advantages of being environmentally friendly and not prone to inducing the bacteria to generate drug resistance, and the problems that an existing antibacterial peptide is insufficient in corrosive bacteria specificity, poor in environmental stability and the like are solved; meanwhile, peptide chains are short, synthesis is easy, and the production cost is low; the compound corrosion inhibition bactericide formed by combining the compound with a chemical bactericide can significantly improve the antibacterial and antiseptic effects, saves the dosage of the chemical bactericide, effectively solves the problems of bacterial drug resistance, high cost, environmental pollution and other pain points caused by abuse of the existing bactericide, and is suitable for the fields of marine microbial corrosion protection and the like.

The invention relates to antibacterial and mildew-proof leather sponge with silver ions, which comprises the following components in parts by weight: 60-80 parts of ethylene vinyl acetate and 1-5 parts of foaming agent. The leather comprises the following components in parts by weight: 40-60 parts of polyester modified MD I, 10-20 parts of a silver ion antibacterial agent, 1-3 parts of a plasticizer, 15-25 parts of a bactericide, 1-2 parts of a mildew preventive, 1-3 parts of sponge glue, 3-5 parts of a cross-linking agent, 0.5-0.6 part of a catalyst, 40-50 parts of a leather body, 1-2 parts of leather softening enzyme and 1-2 parts of a leather adhesive. According to the antibacterial and mildew-proof leather sponge with the silver ions and the preparation method, when sponge leather is prepared, due to the excellent antibacterial performance of the silver ions, the silver ions are in contact reaction with cells, inherent components of bacteria are damaged or functional obstacles are generated, and bacterial death is caused, meanwhile, the leather sponge can be prevented from mildewing in cooperation with the mildew preventive, and the antibacterial and mildew-proof effects are achieved. The leather sponge has the antibacterial and mildew-proof functions, and the use experience of a user is improved.

The invention discloses a bacteriophage capable of efficiently splitting Pseudomonas ongdamura and a composition and application thereof, the bacteriophage is Pseudomonas ongdamura bacteriophage PL1P1, the preservation number is CCTCCM20251191, the Pseudomonas ongdamura bacteriophage PL1P1 is a virulent bacteriophage separated from the nature, and the Pseudomonas ongdamura bacteriophage PL1P1 has relatively high tolerance to ultraviolet rays and pH, and can be used for efficiently splitting Pseudomonas ongdamura and Pseudomonas ongdamura and Pseudomonas ongdamura. The bacteriophage is suitable for different prevention and treatment environments and can achieve a good fresh-keeping effect on chilled meat, DNA of the bacteriophage cannot encode protein possibly causing potential health risks, the possibility of carrying lysogenic genes does not exist, the bacteriophage has high affinity and splitting capacity, the titer of 10 < 10 > PFU / mL or above can be achieved within 24 h of culture, and the bacteriophage has good application prospects. The Pseudomonas longdamura phage PL1P1 can specifically partially or completely inactivate Pseudomonas longdamura, can complete mass proliferation only by using a small amount of initial phage, and provides a high-quality phage strain source for industrial production of phage bactericides.

The utility model discloses a reaction kettle for preparing a non-oxidizing bactericide, and relates to the technical field of reaction kettles for preparing non-oxidizing bactericides, in particular to a reaction kettle for preparing a non-oxidizing bactericide, which comprises a preparation tank, a workbench, a mounting box and a mounting frame, a feeding mechanism is arranged at the bottom of the preparation tank, a tank cover is clamped to the top of the preparation tank, a stirring mechanism is arranged in the preparation tank, a driving motor is fixedly mounted in the mounting box, a driving shaft is fixedly connected to the top output end of the driving motor, a rotating seat is fixedly connected to the top end of the driving shaft, and a mounting plate is arranged at the top of the rotating seat. A hydraulic cylinder is fixedly mounted at the top of the mounting plate, a piston rod is fixedly connected to the output end of the top of the hydraulic cylinder, a hoisting mechanism is arranged at the top end of the piston rod, a cleaning mechanism is arranged in the mounting frame, cleaning can be more thorough through the arrangement of the rotary cleaning mechanism, and thorough discharging is facilitated through the arrangement of a discharging mechanism.

The compound shown in the formula (I) has good activity to various pathogenic bacteria in agriculture or other fields. Moreover, the compound can obtain good prevention and treatment effect at a very low dose, and thus can be used for preparing a fungicide. In addition, the compound has simple preparation steps and high yield, and thus has good application prospect.

The invention belongs to the technical field of marine corrosion and protection, and discloses an antibacterial peptide for marine corrosion prevention and fouling prevention and application of the antibacterial peptide, the sequence of the antibacterial peptide is H-NIle-NVal-NLys-NLU-NPhe-NLU-NTyr-NArg-NSer-NTrp-NLU-NHis-NLU-NLU-NIle-NH2, the antibacterial and preservative effects of common corrosion inhibition bactericides such as quaternary ammonium salts, organic guanidines and aldehydes can be effectively enhanced, and the antibacterial peptide can be applied to marine corrosion prevention and fouling prevention. The generation of a corrosive biological membrane and the microbial corrosion rate can be effectively inhibited, the dosage of a bactericide can be reduced by 60% or above, and continuous antibacterial and anticorrosion for 30 days can be realized.

The use of an LtPCL6 protein and a gene encoding same in regulating pathogenicity, mycelial growth, and stress resistance of Lasiodiplodia theobromae. The gene encoding LtPCL6 protein is derived from Lasiodiplodia theobromae, and a knockout mutant is obtained by constructing a knockout fragment of a Lasiodiplodia theobromae LtPCL6 gene, and introducing same into a Lasiodiplodia theobromae protoplast. Experiments indicate that the LtPCL6 gene has an effect in the growth, cell wall and cell membrane integrity, and stress resistance of Lasiodiplodia theobromae, and significantly reduces the pathogenicity of the Lasiodiplodia theobromae with regard to a host. Therefore, the LtPCL6, serving as a fungicide target and a key protein of a pathogenic mechanism of diseases, can be used for developing agents for diseases caused by Lasiodiplodia theobromae infection and breeding new resistant varieties, and has broad application prospects in the control of plant pathogenic fungal diseases.

The invention discloses application of carnosic acid as an agricultural bactericide and a synergist in plant diseases and a composition of the carnosic acid, and the carnosic acid has a remarkable inhibition effect on colletotrichum sorghum and is superior to a positive control drug azoxystrobin. In addition, carnosic acid is used as a synergist and is compounded with a QoI bactericide capable of inhibiting mitochondrial respiration and / or an SDHI succinate dehydrogenase inhibitor, so that the bactericidal activity can be remarkably improved. The antibacterial effect of the bactericidal composition is greatly improved by compounding the bactericidal composition with azoxystrobin, and the anti-colletotrichum sorghum result shows that when the compounding ratio of azoxystrobin to carnosic acid is 1: 4, the synergistic coefficient SR value is 1.637, and the bactericidal composition has a remarkable synergistic effect.

The invention belongs to the technical field of pesticides, and relates to 11 bactericide compositions for mainly preventing and treating crop diseases caused by pyricularia oryzae and colletotrichum gloeosporioides. The compound YJY-22 provided by the invention is novel in structure and unique in action mode, and has no cross resistance with isoprothiolane, fenoxanil, pyraclostrobin, tricyclazole, azoxystrobin, mancozeb, captan, difenoconazole, prochloraz, chlorothalonil and tebuconazole. As the action mechanism of the compound YJY-22 is different from that of the medicament, and the compound YJY-22 and the medicament have no cross resistance, the compound YJY-22 and the medicament are compounded, so that the sterilization range can be expanded, the sterilization effect can be enhanced, the drug resistance of phytopathogen can be delayed, the safety to crops is good, the prevention and control spectrum is expanded, and the requirements of pesticide reduction and synergism are met.

The invention discloses a dehydroabietyl quaternary ammonium salt of which the chemical structural formula is shown in the following formula. The dehydroabietyl quaternary ammonium salt can be used for effectively inhibiting the growth of valsa mali, Phytophthora capsici, Fusarium graminearum, Fusarium oxysporum f.sp.niveum and Alternaria solani, and the dehydroabietyl quaternary ammonium salt can be used for effectively inhibiting the growth of valsa mali, Phytophthora capsici, Fusarium graminearum, Fusarium oxysporum f.sp.niveum and Alternaria solani. The method has potential value in preparation of green pesticide bactericides, and can reduce adverse effects of the bactericides on the environment and human beings; # imgabs0 #

The present invention relates to a class of (R)-2-aryl-4,5-dihydrothiazole-4-carboxylic acid derivatives containing dihydrazide having fungicidal activity as shown in general formula (I), as well as preparation methods and applications thereof. A pesticide molecule design method of splicing active fragments is used to connect differently substituted (R)-2-aryl-4,5-dihydrothiazole-4-carboxylic acids with differently substituted benzoylhydrazides, wherein R1, R2, R3, R4, R5, R6, R7, R8, R9 and R 10 As defined in the specification. The technical effect of the present invention is: a class of (R)-2-aryl-4,5-dihydrothiazole-4-carboxylic acid derivatives containing dihydrazide with broad-spectrum fungicidal activity has been discovered, which is a fungicide with broad application prospects.

The present application relates to the technical field of pesticides, and discloses a chromene aryl hydrazide derivative, a preparation method and application thereof, a structural general formula of the chromene aryl hyydrazide derivative is as formula (I); the preparation method is as follows: taking p-hydroxybenzaldehyde as raw material, and obtaining the chromene aryl hydrazide compound through substitution reaction, cyclization reaction, oxidation reaction, acylation reaction and hydrazinolysis reaction. The chromene aryl hydrazide compound is used for preparing an agricultural bacteriostatic agent. The present application combines aryl hydrazine and chromene skeleton by using the pharmacophore splicing principle in medicinal chemistry, and designs and synthesizes a series of chromene aryl hydrazide compounds. The bacteriostatic activity test result shows that the compounds have excellent bacteriostatic activity, and can be used as active ingredients for preparing a plant pathogenic fungus fungicide.