102 results about "Rhizoctonia solani" patented technology

The invention discloses application of polypeptide compounds in prevention and treatment of pathogenic microorganisms. The compound has a synergistic effect on agricultural fungi such as rhizoctonia solani, Sclerotinia sclerotiorum, Botrytis cinerea, Fusarium graminearum, Pyricaria oryzae, pyricularia oryzae, pyricularia oryzae, pyricularia oryzae, pyricularia oryzae, pyricularia oryzae, pyricularia oryzae, pyricularia oryzae, pyricularia oryzae, pyricularia oryzae, pyricularia oryzae, pyricularia oryzae and pyricularia oryzae. The method comprises the following steps: carrying out sterilization on plant bacteria such as Xanthomonas oryzae PXO99A, Xanthomonas axonophora dispsp.citrijx-6, Pseudomonas solanacearum (Smith) BNCC335855, Pseudomonas sp. The method is characterized by comprising the following steps of: killing Aspergillus flavus ACCC32601 (Aspergillus flavus), Penicillium expansum ACCC 30898 (Penicillium expansum. EXPANSum ACCC 30898), Monilinia coerulea ACCC 36263 (Aspergillus oryzae, Aspergillus niger, Aspergillus niger, Aspergillus niger, Aspergillus niger, Aspergillus niger, Aspergillus niger, Aspergillus niger and Aspergillus niger); the compound disclosed by the invention has a certain inhibition activity on various diseases caused by streptococcus agalactiae ATCC 27956, streptococcus dysgalactiae ATCC27957, Escherichia coli ATCC 25922 and Staphylococcus aureus, particularly, the compound Thiostreptin has a particularly remarkable inhibition effect on agricultural pathogenic bacteria, food-borne germs and cow mastitis germs, and is expected to be developed into a novel antibacterial drug, so that the compound disclosed by the invention can be used for preparing the antibacterial agent for preventing and treating various diseases caused by the streptococcus agalactiae ATCC 27956, the streptococcus dysgalactiae ATCC27957, the Escherichia coli ATCC 25922 and the Staphylococcus aureus.

The invention belongs to the technical field of microorganisms and biological control, and particularly relates to paenibacillus polymyxa and application thereof in biocontrol and growth promotion. Specifically, a strain of paenibacillus polymyxa GLZ219 is obtained through screening, and experiments prove that the paenibacillus polymyxa GLZ219 has a relatively high bacteriostasis rate on pathogenic bacteria of tomato neck and root rot; meanwhile, the strain has a good antagonistic effect on nine common plant pathogens such as Rhizoctonia solani and the like, and can be widely applied to green prevention and control of various crop diseases. Besides, the paenibacillus polymyxa GLZ219 has nitrogen fixing and potassium dissolving capabilities, can secrete heteroauxin and siderophores, and can effectively promote the growth of tomato plants, the plant height of tomato seedlings treated by fermentation liquor of the paenibacillus polymyxa GLZ219 is remarkably increased, diseases can be prevented and controlled, the growth vigor of crops can be improved, the yield and quality of the crops can be improved, and the paenibacillus polymyxa GLZ219 has a wide application prospect.

The present invention relates to the field of microbial technology, and in particular to a Velez bacillus HF01 and its application; Velez bacillus HF01 has been deposited as a patented strain in the General Microbiological Center of China Microbiological Culture Collection Administration Committee, with a deposit number of CGMCC NO: 33137. The strain has a significant effect in preventing and treating wax gourd damping-off disease caused by plant pathogens; it has a good inhibitory effect on wax gourd damping-off disease caused by Rhizoctonia solani, and can also promote the growth of wax gourd.

The invention discloses trichoderma Guizhou GZMT12 and application thereof, and belongs to the technical field of microorganisms. The preservation number of the trichoderma Guizhou GZMT12 screened by the invention is CGMCC (China General Microbiological Culture Collection Center) NO. 42152. According to the present invention, the bacterial strain can provide inhibition effects on seven pathogenic bacteria such as Rhodococcus solani Kuhn, Botryosphaeria dothidea, Alternania alternania, Phomopsis litsea, Colletotrichum truncatum, Phytotrichum capsici, and Phytotrichum nitianae, and further has advantages of good prevention and treatment effect, wide antibacterial spectrum, wide application range, and the like.

The invention discloses bacillus velezensis as well as a biological preparation and application thereof, and belongs to the technical field of microorganisms. The bacillus velezensis is rice endophytic bacillus velezensis, is classified and named as bacillus velezensis HA-B13, is preserved in the China Center for Type Culture Collection (CCTCC), has the preservation number of CCTCC NO: M 20251098, shows extremely excellent biological activity to nigatosporium oryzae, has the antibacterial rate of 94%, and can be used for preparing the bacillus velezensis. Meanwhile, the bacillus subtilis also has relatively good biological activity on a plurality of rice pathogenic bacteria such as rhizoctonia solani, pyricularia grisea, gylastoma gonoryzae and the like. And the strain is derived from rice plants and can be well colonized in the rice plants, so that the strain has a long-acting prevention and treatment effect on diseases such as spike rot and the like, can effectively reduce the investment of rice disease prevention and treatment products, is safer and has great prevention and treatment application potential.

The invention relates to the technical field of microorganisms, and particularly discloses bacillus deserticola for resisting tobacco target leaf spot, a bacterial drug compound and application of the bacillus deserticola and the bacterial drug compound. The bacillus deserticola is bacillus deserticola 127-2 and is preserved in the China General Microbiological Culture Collection Center on April 1, 2025, the address is Institute of Microbiology, Chinese Academy of Sciences, No.3, No.1 Yard, West Beichen Road, Chaoyang District, Beijing, the preservation number is CGMCC No.34058, and the bacillus deserticola is classified and named as Bacillus inaquorum; the in-vessel inhibition rate of the strain 127-2 to tobacco target leaf spot caused by rhizoctonia solani is 87.5%, the in-vivo inhibition activity also reaches 50% or above, the in-vivo inhibition activity of the strain 127-2 to tobacco target leaf spot caused by compounding of the strain 127-2 and pyraclostrobin reaches 98% or above, and the purposes of drug reduction, persistent effect and efficient prevention and control of rhizoctonia solani can be effectively achieved through the synergistic effect of bacteria and drugs.

The invention relates to a microbial composition for preventing and treating eggplant rhizome diseases and application thereof, and the composition comprises a) Bacillus velezensis and Aspergillus oryzae, and b) fulvic acid, alginic acid, amino acid, rape pollen polysaccharide, oyster peptide, berberine and potassium phosphite. Wherein the preservation number of the bacillus velezensis is CCTCC (China Center For Type Culture Collection) NO: M2022923, and the preservation number of the aspergillus oryzae is CCTCC NO: M2021249. The composition provided by the invention has a relatively good prevention and control effect on root and stem diseases caused by infection of Ralstonia solanacearum, Rhizoctonia solani, Verticillium dahlii, Fusarium solani, Choanephra cucurbitarum and Basidiomycetes, and when the composition is applied to soil, the enzyme activity of the soil and the enzyme activity of the root system of the eggplant can be effectively improved. The composition provided by the invention has a relatively good prevention and control effect on the root and stem diseases caused by infection of the Ralstonia solanacearum, the Rhizoctonia solani, the Verticillium dahlii, the Fusarium solani, the Choanephra cucurbitarum and the Basidiomycetes.

The invention discloses a streptomyces albidoflavus strain SaTC2601 and application thereof, and belongs to the field of biological control. According to the invention, a streptomyces albidoflavus strain SaTC2601 is separated from faeces of larvae of WSFC, and the preservation number of the streptomyces albidoflavus strain SaTC2601 is CGMCC (China General Microbiological Culture Collection Center) No.33741. The strain SaTC2601 has a very good prevention and treatment effect on peanut southern blight caused by sclerotium rolfsii at peanut roots, also has a prevention and treatment effect on soil-borne pathogenic bacteria such as fusarium graminearum, fusarium solani, fusarium moniliforme, fusarium oxysporum, rhizoctonia solani and streptomyces scabies, and further, the strain SaTC2601 also has a very good growth promoting effect. The strain becomes a precious resource for new drug development and agricultural disease prevention and control, and is expected to play a huge role in the aspect of soil disease prevention and control.

The application discloses application of undecyl-prodigiosin in inhibition of a root rot pathogen (Fusarium oxysporum) of Salvia miltiorrhiza, and belongs to the technical field of microbial pesticides. 25 H 33 The compound has a molecular formula of C 50 N3O, is derived from Streptomyces aurantiacus YS-4, has a concentration-dependent inhibitory effect on the Fusarium oxysporum, an EC of 33.1 μg / mL, and an inhibition rate of 83.3% at 400 μg / mL. The application further provides a preparation containing the compound, wherein the concentration of the compound is not less than 20 μg / mL, and the concentration of the target area after application is controlled in a range of 20 μg / mL to 400 μg / mL, so that the root rot of Salvia miltiorrhiza can be effectively prevented and treated. As a natural microbial metabolite, the compound is environment-friendly, has no residue, and is not easy to produce drug resistance, solves the pollution problem of chemical prevention and treatment, and provides a new scheme for green prevention and treatment of the root rot of Salvia miltiorrhiza.

The invention belongs to the technical field of pesticide chemistry, and particularly relates to an application of a substituted phenylhydrazine copper salt complex as an agricultural fungicide, the structural general formula of the substituted phenylhydrazine copper salt complex is [Cu (ArNHNH2) 2] Xn, Ar is selected from 3-chlorphenyl-, 2, 4-dichlorophenyl-, 2, 4-dichlorophenyl-, 2, 4-dichlorophenyl-, 2, 4-dichlorophenyl-, 2, 4-dichlorophenyl-, 2, 4-dichlorophenyl-, 2, 4-dichlorophenyl-, 2, 4-dichlorophenyl-, 2, 4-dichlorophenyl-, the compound is prepared from 2, 6-dichlorophenyl, p-trichloromethoxyphenyl, 4-trifluoromethylphenyl, 4-trifluoromethoxyphenyl, 4-bromophenyl, 4-nitrophenyl, 4-cyanophenyl and 4-carboxyphenyl, and the compound is prepared from 2, 6-dichlorophenyl, p-trichloromethoxyphenyl, 4-trifluoromethylphenyl, 4-trifluoromethoxyphenyl, 4-bromophenyl, 4-nitrophenyl, 4-cyanophenyl and 4-carboxyphenyl. X is selected from SO4 <->, Cl <-> and NO3 <->; n is equal to 1-2. The substituted phenylhydrazine copper salt complex disclosed by the invention has remarkable inhibitory activity on plant pathogenic bacteria, has very high inhibition rate on three plant pathogenic fungi, namely fusarium graminearum, rhizoctonia solani and sclerotium rolfsii, can be used as a safe and efficient novel bactericide, and is applied to prevention and treatment of various crop diseases.

This invention belongs to the field of microbial technology, specifically relating to a strain of Acetobacter peroxide 672 and its applications. The Acetobacter peroxide 672 strain of this invention can enhance the antagonistic activity of Pichia pastoris against Rhizoctonia solani and also antagonizes Colloidal anthracnose, providing a multi-faceted solution for the biological control of crop diseases. Furthermore, the strain possesses the ability to produce indoleacetic acid, which can significantly promote the growth and development of grain crops such as wheat and corn, promote root expansion, enhance nutrient and water absorption, and thus effectively increase biomass. In addition, the strain can tolerate and degrade chemical pesticide components such as imidacloprid and carbendazim, alleviating soil pesticide residue pollution, and can effectively alleviate the inhibitory effects of low pH stress on crops, enhancing their stress resistance. Therefore, the Acetobacter peroxide 672 strain of this invention has significant application value in the biological control of crop diseases, crop growth promotion, soil pesticide residue remediation, and enhancing crop stress resistance.

The invention discloses a strain of Lysinibacillus bacilli B1 and application thereof, and belongs to the technical field of microorganisms. The preservation number of the bacstein lysine bacillus B1 is GDMCC No: 66653, and the preservation number of the bacstein lysine bacillus B1 is GDMCC No: 66653. The bacstein lysine bacillus has an inhibition effect on penicillium expansum, aspergillus ochraceus, botrytis cinerea, escherichia coli, listeria monocytogenes, sclerotium rolfsii, root rot bacteria, ralstonia solanacearum and fusarium oxysporum. The strain can be used for preventing and treating southern blight and root rot of siraitia grosvenorii, banana fusarium wilt, mycosis of navel oranges and the like; the bacterial fertilizer can be applied to the fields of fruit preservation and bacterial fertilizer biocontrol of the plants; meanwhile, the strain can also be applied to the field of food preservation, is a bacterial strain with multiple functions and wide application fields, and has a good application prospect.

The application provides a Rhodiola kirilowii root rot harmless prevention and control method and relates to the technical field of plant disease prevention and control. The Rhodiola kirilowii root rot harmless prevention and control method is characterized by the following steps: after seed disinfection, the seed is treated by immersion in a solution of a Yunnan sclerotia of Sclerotinia spore powder extract, and a fermentation substrate of Bacillus subtilis and Bacillus amyloliquefaciens is used, and then the roots are irrigated with a solution of a Yunnan sclerotia of Sclerotinia spore powder extract and a Trichoderma harzianum liquid. The method can effectively prevent and control the Rhodiola kirilowii root rot, reduce the use of chemical pesticides, reduce pesticide residues, and improve the safety of planting.

The application belongs to the field of agricultural fungicide compound, discloses a composition containing new white folium altheae alkaloid derivative Z-24 and anthraquinone components (emodin, emodin methyl ether, chrysophanol, aloe emodin) in rhubarb and mixed concentration thereof. The application of the composition in preventing and treating plant diseases caused by rhizoctonia solani, sclerotinia sclerotiorum, fusarium graminearum, botrytis cinerea, pyricularia oryzae and phytophthora capsici is disclosed, and the mass percentage of new white folium altheae alkaloid derivative Z-24 and anthraquinone components is 1:500, 1:100, 1:50 or 1:25. The fungicidal composition disclosed in the application has the advantages of wide fungicidal spectrum, low toxicity, effective delay of drug resistance of plant pathogens and the like, and has the value of further research and development.

The application belongs to the technical field of chemical synthesis, and particularly relates to a trifluoromethyl-containing benzothiazole tertiary alcohol derivative, a preparation method and application thereof. 1 , R 2 are independently selected from hydrogen, C1-C3 alkyl, C1-C3 alkoxy or halogen; or R 1 , R 2 independently form a naphthalene ring with the substituted benzene ring together. The trifluoromethyl-containing benzothiazole tertiary alcohol derivative provided by the application has good bacteriostatic effect on one or more of Rhizoctonia solani, Fusarium moniliforme, Fusarium graminearum, Fusarium oxysporum and Phytophthora nicotianae.

The invention discloses a quinolinic acid diaryl ether derivative, a preparation method and application thereof and a bacteriostatic agent or bactericide, relates to the technical field of medicinal chemistry, solves the problems that existing pesticides are high in toxicity and not environmentally friendly, easily cause drug resistance of pathogenic bacteria and possibly have negative effects on the environment and an ecological system, can efficiently prevent and treat fungal diseases of plants, and also can effectively prevent and treat the pathogenic bacteria of the plants. The quinolinic acid diarylether derivative has the advantages that the quinolinic acid diarylether derivative has excellent inhibition activity on agricultural fungi such as rhizoctonia solani, sclerotinia sclerotiorum, botrytis cinerea, fusarium graminearum and fusarium pseudograminearum, and the quinolinic acid diarylether derivative has the characteristics of simple synthesis process, cheap and easily available raw materials, good control effect, wide bactericidal spectrum and the like.

The invention discloses a microbial bacterium inhibitor as well as a preparation method and application thereof, the microbial bacterium inhibitor is fermentation liquor obtained by activating and fermenting bacillus siamensis YWF-25-21, and the microbial bacterium inhibitor has a relatively good prevention and treatment effect on tobacco black shank, fusarium root rot and rhizoctonia solani. The bacillus siamensis microbial agent prepared by the invention is high in spore content, can reduce crop disease loss, can effectively promote crop plant growth and development, and can enhance crop stress resistance; the method can meet the requirement of batch industrial production, ensures that products are more stably supplied on the market, directly reduces the production cost, improves the economic benefits, and is suitable for popularization and application.

The invention belongs to the technical field of plant disease control, and particularly relates to application of amide compounds or agrochemically acceptable salts thereof in preparation of antifungal drugs. The amide compound or the acceptable salt of the amide compound shows remarkable broad-spectrum antibacterial activity on various plant pathogenic fungi such as rhizoctonia solani, tobacco target leaf spot bacteria and magnaporthe oryzae, and has no visible phytotoxicity symptom on plants in an effective concentration range. The action mechanism research shows that the amide compound or the acceptable salt thereof inhibits the growth of fungi through multiple ways: (1) the biological wall and cell membrane structures of the fungi are destroyed to cause the outflow of contents so as to play a bactericidal role; (2) the physiological function of fungal normal cells is interfered, so as to induce programmed death of fungal cells. The invention provides an important reference way for developing a high-efficiency novel agricultural bactericide.

The invention discloses a bacteriostatic slow-release water-saving type hole storage ball based on industrial hemp stalks and a preparation method thereof.The hole storage ball is prepared from, by mass, 5-10 parts of industrial hemp stalk powder, 30-50 parts of montmorillonite powder, 2-10 parts of activated carbon, 5-10 parts of a water-retaining agent, 5-20 parts of a water-soluble nitrogen-phosphorus-potassium compound fertilizer and 20-40 parts of water; the montmorillonite powder, the activated carbon and the water-soluble nitrogen-phosphorus-potassium compound fertilizer are premixed and then secondarily mixed with the industrial hemp stalk powder and the water-retaining agent, and granulation molding is performed to prepare the hole storage ball. According to the invention, antibacterial substances such as cannabinol naturally contained in the waste industrial hemp stalks are fully utilized, so that the fertilizer block is endowed with an internal plant health-care function, the hole storage ball effectively inhibits soil-borne pathogenic bacteria such as fusarium and rhizoctonia solani, the phenomena of root rot and seedling death of crops are reduced, the use of chemical pesticides is reduced, and the production cost is reduced. The problems of crop water retention, bacteriostasis and soil improvement can be solved simultaneously, waste is turned into wealth, and the method is suitable for popularization and application.

‘FAES1319’ is a new and distinct zoysiagrass (Zoysia japonica Steud.) variety distinguished at least by its medium leaf texture, high turfgrass quality, good shade tolerance, good winter color retention, good spring green up, and low incidence of large patch disease caused by Rhizoctonia solani anastomosis group 2-2 LP. It has exhibited broad adaptation to contrasting environments from the Southern U.S. and north into the Transition Zone.

The invention belongs to the technical field of microbial control, and particularly relates to a soybean root rot biocontrol bacterium with growth-promoting and yield-increasing functions, a bacterium agent, a preparation method and application. The biocontrol bacterium is a salt-tolerant bacillus, is named as GY6, is preserved in the China Center for Type Culture Collection (CCTCC) on November 12, 2025, and has the preservation number of CCTCC M 20252537. The salt-tolerant bacillus GY6 has soybean root rot antagonistic ability, and can play a growth promoting effect through IAA production, phosphate solubilization, potassium release and the like. Through synergistic promotion of disease prevention and control and healthy growth of crops, the GY6 strain can achieve synergistic improvement of crop yield and quality, and an effective way is provided for green yield increase of soybeans. The microbial inoculum prepared from the GY6 has positive promotion effects on reducing agricultural non-point source pollution, promoting soil health and even constructing a sustainable farmland ecosystem.

The invention provides an RPA primer / probe combination for detecting rhizoctonia solani AG-3TB and application of the RPA primer / probe combination, and belongs to the technical field of phytopathogen detection. The RPA primer comprises an upstream primer and a downstream primer, the nucleotide sequence of the upstream primer is as shown in SEQ ID NO. 2; the nucleotide sequence of the downstream primer is as shown in SEQ ID NO. 5; the nucleotide sequence of the probe is as shown in SEQ ID NO. 7. According to the present invention, based on the AG-3TB subgroup strain whole gene series, the specific fluorescent primer and the probe are autonomously designed, the efficient and sensitive method suitable for rapid detection is developed, the specificity is strong, and the AG-3TB subgroup can be distinguished.

Trifluoroacetone with benzene rings and different heterocyclic rings and substituted salicylaldehyde are used as raw materials, DMSO is used as a solvent, reflux reaction is performed to generate benzopyran derivative crude products with different substituent groups, the crude products are post-processed to obtain the benzopyran derivative, TLC or liquid phase tracking reaction is performed to obtain the benzopyran derivative, and the benzopyran derivative with different substituent groups is obtained. The reaction process is simple and easy to operate. Antifungal activity experiments are carried out on the synthesized eighteen compounds, the antibacterial rates of the compounds on fusarium graminearum, rhizoctonia solani, fusarium moniliforme and fusarium oxysporum are determined, and the inhibition rate of the thiophenedibromo pyrone on rhizoctonia solani at 200 ppm is the highest and is 98.84%; the unsubstituted dichloropyrone has the highest inhibition rate on fusarium graminearum, and the inhibition rate is 66.08%; the inhibition rate of the pyridine dichloro pyrone on fusarium oxysporum is the highest, and is 71.07%; the inhibition rate of the pyridine dichloro pyrone on fusarium moniliforme is the highest, and is 69.12%. The benzopyran derivative synthesized by the method has a good application prospect in various fields of medicines, organic synthesis, biosensing, photoelectric materials and the like.

The invention relates to novel acridine spiroisoxazole compounds, a preparation method thereof and application of the novel acridine spiroisoxazole compounds in antifungal drugs. The novel acridine spiroisoxazole compounds have the antibacterial activity of 36 compounds, and the 36 compounds have the inhibiting effect on botrytis cinerea, parasite scalaria, rhizoctonia solani, fusarium graminearum and candida albicans. The antifungal biological activity result shows that the compound series all show obvious antibacterial activity. The compound is determined as a broad-spectrum antibacterial candidate due to the comprehensive antibacterial characteristics of the compound, and the EC50 value (5.0 + / -0.4 mu g / mL) of H35 shows 1.5 times, 2.2 times and 3.2 times of titer advantages compared with positive control drugs famoxadone (7.6 mu g / mL), chlorothalonil (11.1 mu g / mL) and carbendazim (15.9 mu g / mL) respectively. The spiro structure of the compound can significantly improve the antibacterial activity of the compound, the preliminary mechanism research target shows that the compound is related to fungal membrane damage, and in addition, the compound H35 has protection and treatment effects on botrytis cinerea infection in corn, which shows that the compound H35 has agricultural application potential.

The invention discloses a method for effectively preventing and treating damping-off of radix pseudostellariae. The method is a method for comprehensively preventing and treating damping-off of radix pseudostellariae by combining medicaments with agricultural measures. The prevention and control method mainly comprises the following steps: 1) soil improvement: improving the soil before planting, increasing the soil fertility, properly applying an organic fertilizer, and controlling the use amounts of a nitrogen fertilizer and a chemical fertilizer at the same time; 2, soil disinfection is conducted on planting compartment surfaces before planting; (3) disinfecting seminal roots; 4, management is enhanced, and air permeability and drainage of the soil are kept; 5) regularly inspecting the plants after seedling emergence, and timely removing infected parts; 6) spraying the plant rhizomes with a pesticide for prevention and control; (7) proper plant spacing and a good ventilation environment are kept. The method has the advantages of being easy and convenient to operate, low in cost and obvious in economic benefit and social benefit, effectively solves the disease problem of damping off of the radix pseudostellariae, can ensure the quality and safety of medicinal materials while increasing the yield of the radix pseudostellariae, and is widely suitable for production and planting of the radix pseudostellariae.

The invention belongs to the technical field of microbial control, and particularly relates to a cigar tobacco root rot biocontrol bacterium with root strengthening and growth promoting functions, a bacterium agent, a preparation method and application. The biocontrol bacterium is bacillus subtilis, is named as SY2, is preserved in the China Center for Type Culture Collection on October 15, 2025, and has the preservation number of CCTCC M 20252220. The bacillus subtilis can be used for preparing the cigar tobacco root rot biocontrol microbial inoculum with root strengthening and growth promoting functions, the bacillus subtilis is colonized in a CX-14 rhizosphere for a long time by utilizing the specific affinity of the bacillus subtilis and cigar tobacco CX-14, the growth promoting and root rot preventing and treating effects can be stably exerted, and the lodging resistance of cigar tobacco is improved.

This invention belongs to the field of biotechnology. To improve the effectiveness of biological control of plant diseases, this invention discloses *Bacillus velezensis* ZF516 and its application in controlling various soil-borne diseases. The *Bacillus velezensis* strain number is ZF516, and its registration number at the China General Microbiological Culture Collection Center is CGMCC No. 30136. This *Bacillus velezensis* strain can prevent and / or treat tomato bacterial canker, tomato bacterial wilt, or cowpea root rot, or can be used to prepare products for the prevention and / or treatment of these diseases. This strain also exhibits good inhibitory effects against *Fusarium oxysporum*, *Diplostomum spp.*, *Rhizoctonia solani*, *Fusarium solanum*, *Corynebacterium multiflorum*, *Botrytis cinerea*, *Agrobacterium tumefaciens*, *Pectinobacter brasiliensis*, *Ralstonia solanacearum*, *Streptomyces spp.*, etc.

The invention provides a nano pesticide-fertilizer composite material based on amino acid as well as a preparation method and application thereof, and belongs to the technical field of pesticide slow release. According to the preparation method, amino acid is used as an organic ligand, metal iron ions are used as cross-linking nodes to be doped into the amino acid through a hydrothermal method, and a template agent or an auxiliary organic ligand is used as an additive, so that the biodegradable amino acid-iron compound nano-carrier with large pores and high specific surface area is obtained; the amino acid-iron compound nano-carrier is used as a raw material, and then the pesticide raw material is loaded into the amino acid-iron compound nano-carrier in an adsorption manner, so that a slow / controlled release, degradable and environment-friendly nano-pesticide compound system is constructed, the growth of rhizoctonia solani can be effectively controlled, the bactericidal activity of rhizoctonia solani is improved, and the application prospect is wide. And moreover, the use efficiency of the pesticide is enhanced, the possible pollution of the pesticide to the environment is reduced, and a good nutritional function can be provided for plants.

The invention provides a preparation method and application of methyl 2-hydroxyphenylacetate. The methyl 2-hydroxyphenylacetate is separated from a fermentation culture of streptomyces wetland 13-3 with the preservation number of CGMCC (China General Microbiological Culture Collection Center) No. 22830. According to the method, the compound methyl 2-hydroxyphenylacetate is obtained from streptomycete for the first time, verification proves that the methyl 2-hydroxyphenylacetate has broad-spectrum antibacterial activity on various plant pathogenic fungi, particularly, the inhibitory activity on aspergillus fumigatus, colletotrichum truncatum, rhizoctonia solani, verruca verrucosa and magnaporthe oryzae is higher than that of amphotericin B, and the methyl 2-hydroxyphenylacetate can be used for preparing antibacterial agent drugs and has broad-spectrum antibacterial activity. A novel natural antibacterial compound is provided for the fields of agriculture and medicine, and the method is simple and convenient to operate, high in purification efficiency and environment-friendly.

The present disclosure belongs to the technical field of plant disease control, and specifically relates to use of 4-(diethylamino)salicylaldehyde in controlling a phytopathogen, a method for controlling a phytopathogen, and a bactericide. The 4-(diethylamino)salicylaldehyde shows an excellent inhibitory effect on the phytopathogen (including a phytopathogenic fungus and / or a phytopathogenic bacterium), especially has the best inhibitory effect on Rhizoctonia solani and Erwinia amylovory, and exhibits a potential to be developed into a novel bactericide.