59 results about "Alternaria" patented technology

The application discloses application of BoDMR1 and BoDMR6 genes in cultivating disease-resistant broccoli varieties, an expression vector and a cultivating method, and relates to the technical field of plant molecular biology. A nucleotide sequence of a broccoli BoDMR1 gene is shown in SEQ ID No: 7, or a nucleotide after gene mutation of the nucleotide sequence shown in SEQ ID No: 7; and a nucleotide sequence of a broccoli BoDMR6 gene is shown in SEQ ID No: 8, or a nucleotide after gene mutation of the nucleotide sequence shown in SEQ ID No: 8. Through gene editing on endogenous BoDMR1 and / or BoDMR6 genes of plants, mutant plants showing resistance to diseases such as sclerotinia, black rot and alternaria blight can be obtained. Therefore, the application is beneficial to providing good resources for cultivating disease-resistant broccoli varieties.

The application discloses a bacillus velezensis A13 wettable powder and application thereof, and belongs to the technical field of biological pesticides. The application aims to solve the problems of limited prevention and treatment effect of existing seed treatment, high labor intensity of foliar spraying and short effective period. The wettable powder comprises a mother powder prepared from fermentation liquor and diatomite, and a dispersant, a wetting agent, a stabilizer and a protective agent, wherein the total addition amount of the dispersant and the wetting agent is 5%-14% of the mass of the mother powder, the addition amount of the protective agent is 0.5%-2% of the mass of the mother powder, and the addition amount of the stabilizer is 1%-3% of the mass of the mother powder. The application can be used for preventing and treating root diseases caused by panax quinquefolius rust rot fungus and leaf diseases caused by panax quinquefolius alternaria leaf spot fungus, and promoting plant growth.

The invention relates to a preparation for preventing and / or treating sugarcane leukosis and application thereof, and relates to the technical field of biological agents. The preparation comprises bacillus mucilaginosus, bacillus megatherium, bacillus laterosporus, alternaria tenuissima activator protein, calcium acetate, magnesium sulfate and glucose. The preparation has a relatively good prevention and / or treatment effect on the sugarcane bacterial leaf streak, and also can promote the growth of the sugarcane at the same time.

The present application relates to a kind of new compound and its preparation method and application, specifically 1-substituted phenyl-5-methyl-1 H Preparation and application of pyrazole-3-formamide derivatives. The structural formula of the compound 1-substituted phenyl-5-methyl-1 H Pyrazole-3-formamide derivatives is as shown in formula I. Wherein, R1 selected from: 4-chloro or 2,4-dichloro;R2 selected from: H, methyl, methoxy, cyclopropyl;R3 selected from: 3-methylphenyl, 3-nitrobenzyl, 4-nitrobenzyl, 4-chlorophenyl, 2-(5-chloro-1 H Indole-3-yl) ethyl, N-(4-chlorophenyl)-2-phenyl. Test shows that the compound of the application shows good antifungal activity to grape cavity fungus (Botryosphaeria dothidea) (Botryosphaeria dothidea), Pythium aphanidermatum (Pythium aphanidermatum), Fusarium oxysporum (Fusarium oxysporum), Gray pear spot fungus (Gymnosporangium japonicum), Alternaria alternata (Alternaria alternata), Sclerotinia sclerotiorum (Sclerotinia sclerotiorum), Botrytis cinerea (Botrytis cinerea), and has wide application prospect. Botryosphaeria dothidea Pythium aphanidermatum Fusarium oxysporum Phyricularia grisea Alternaria nees Sclerotinia sclerotiorum Botrytis cinerea ​​​​​​​

This invention belongs to the field of biotechnology, specifically disclosing a rapid sporulation method for *Alternaria ginseng*. The method involves activating and culturing *Alternaria ginseng* in PDA medium at 25°C in the dark for 10 days. Mycelial cakes are then collected from the colony edges using a punch. These mycelial cakes are inoculated onto a sporulation medium and cultured in a sealed dark environment at 22°C for 4 days. After making crisscross cuts 1 cm from the center of the colony, the cells are treated with ultraviolet light for 9 minutes. The culture dish is then left uncovered and placed at 22°C. Finally, the cells are cultured in a light incubator at 70% relative humidity for 12 hours followed by 12 hours in the dark, resulting in rapid sporulation at the cuts. Compared to existing technologies, this invention significantly shortens the sporulation cycle (5 days), greatly saving time and costs.

This invention belongs to the field of pharmaceutical technology, and relates to the use of a combination of sour cherry powder and celery seed powder, and complexes containing this composition. Specifically, the sour cherry powder and celery seed powder composition is used in the preparation of drugs for treating or regulating intestinal flora imbalance caused by hyperuricemia. The preparation method of this composition is as follows: pitting sour cherries, freezing them separately with liquid nitrogen, grinding them into powder using a pulverizer, and sieving them separately to obtain sour cherry powder and celery seed powder; mixing the obtained sour cherry powder and celery seed powder at a ratio of (0.5~3):1. This invention discusses the diversity, richness, and evenness of intestinal flora through diversity analysis, community bar chart analysis, and Venn diagram analysis. The results show that this composition can increase beneficial bacteria (Prevotella, Mulliez, Lactobacillus, etc.), reduce harmful bacteria (Alternaria), improve the structure of intestinal flora, and maintain the balance of intestinal flora.

The invention discloses a chenopodium ambrosioides seed endophytic fungus Alternaria alstroemia HZ132. The endophytic fungus Alternaria alstroemia HZ132 is preserved in Guangdong Microbial Culture Collection Center with the preservation number of GDMCC No. 66913, and the preservation number of the endophytic fungus Alternaria alstroemia HZ132 in Guangdong Microbial Culture Collection Center is GDMCC No. 66913. The strain has strong capabilities of solubilizing phosphorus, producing indoleacetic acid, producing siderophores and resisting cadmium, is inoculated with HZ132 under cadmium stress, can significantly promote plant growth and enhance cadmium resistance of plants, and has important significance in plant-microorganism combined remediation of heavy metal contaminated soil.

The invention relates to a biofungicide based on the bacterium Pseudomonas lini strain S57, RGM 2930 CChRGM (Chilean Collection of Microbial Genetic Resources) for agricultural use, especially in saline-boric environments. The biofungicide can be developed as solid and liquid formulations. Where the strain S57, has fungicidal properties against the phytopathogenic fungi Botrytis cinerea. Fusarium oxysporum, Monilinia fructicola, Alternaria sp., Geotrichum candidum, and Macrophomina phaseolina, both in the presence and absence of saline-bone conditions.

The invention belongs to the technical field of agriculture, and particularly relates to a degerming and seedling formation solution, a preparation method, an application method and a method for promoting seed germination and seedling formation. The degerming and seedling formation solution provided by the invention comprises gibberellic acid, indoleacetic acid, naphthylacetic acid, coptis chinensis and carbendazim, and the combination of coptis chinensis extract, carbendazim and growth hormone (gibberellic acid, indoleacetic acid and naphthylacetic acid) in a specific proportion has a synergistic inhibition effect on alternaria alternata and has a promotion effect on seed germination and seedling formation. The invention provides the preparation method of the degerming and seedling forming solution, and the application is simple. According to the application method of the degerming and seedling forming solution, the operation steps are simple, convenient and efficient, and the seedling forming efficiency is remarkably improved. The result of the embodiment shows that the germination rate of the Sinojackia xylocarpa seeds reaches 100% after the optimal treatment is performed for 15 days, and the survival rate of the seed seedlings reaches 96.67% after the optimal treatment is performed for 30 days.

This invention belongs to the field of biological agent technology, specifically relating to a strain of *Trichoderma*, a biocontrol agent, a bio-organic fertilizer, and methods and applications for controlling plant diseases. This invention provides a strain of *Trichoderma* P11, with accession number CCTCC NO: M 2024648. The *Trichoderma* P11 of this invention can enhance positively correlated disease resistance genes in plants. PnCAD , PnSN1 , PnDEFL1 The relative expression level of *Trichoderma* P11 was increased, enhancing the activity of disease resistance-related enzymes SOD, POD, and CAT. Furthermore, *Trichoderma* P11 could damage the cell membrane of pathogens, inhibiting their growth. *Trichoderma* P11 also exhibits good rhizosphere colonization ability. The results of the examples show that *Trichoderma* P11 of the present invention can reduce the incidence of root rot in Panax notoginseng fields and can also antagonize various pathogens such as *Pseudomonas aeruginosa*, *Pseudomonas oryzae*, *Geotrichum candida*, *Early Blight of Tomato*, *Phytophthora indicum*, *Phytophthora capsici*, and *Alternaria spiralis*.

The application discloses a pesticide composition containing fluopyram and application of the pesticide composition in prevention and treatment of apple alternaria leaf spot, and belongs to the technical field of pesticides. A volatile oil extract of Alpinia galanga and a volatile oil extract of Eupatorium fortunei are obtained, and in indoor tests, the colony diameters of apple Alternaria alternata are all reduced, which indicates that the volatile oil extract of Alpinia galanga and the volatile oil extract of Eupatorium fortunei can inhibit the mycelium growth of apple Alternaria alternata. The volatile oil extract is used as a synergistic extract, combined with fluopyram, and added with various additives to prepare the pesticide composition containing fluopyram. In field tests, the disease index of fruit trees is all reduced, which indicates that apple Alternaria alternata is inhibited, and the relative prevention and treatment efficiency of the compound group is the highest and reaches 80.05%. The pesticide composition containing fluopyram is prepared by compounding fluopyram and the synergistic extract containing the volatile oil extract of Alpinia galanga and the volatile oil extract of Eupatorium fortunei, the pesticide composition can better inhibit apple Alternaria alternata, and is suitable for development of a pesticide for preventing and treating apple alternaria leaf spot.

The invention discloses a grape wine color protection method based on alternaria MG1, and belongs to the technical field of fermented wine brewing. According to the method, alternaria MG1 is taken as a research object, a phenylpropane metabolic pathway of alternaria MG1 is activated through various stimulation methods such as ultraviolet radiation, exogenous addition of oligomeric proanthocyanidins, co-culture with other endophytic filamentous fungi and the like, and the alternaria MG1 and saccharomyces cerevisiae are subjected to mixed fermentation, so that an optimal color protection process for grape wine color is explored. The invention deeply discusses the influence of the mixed fermentation on the color and the related quality characteristics of the wine, provides a new theoretical support and a process optimization strategy for the application of the multi-strain synergistic fermentation based on the grape endophyte in wine brewing, and has important guiding significance for production practice.

The present invention relates to a method for controlling or preventing infestation of a plant by a phytopathogenic microorganism of the genus Fusarium, Aceturium, Corynespora, Alternaria or Colorospora, the method comprising applying a combination or composition to the plant, its locus or its propagation material in any desired sequence or at the same time, the combination or composition comprises as component (A) a compound of formula (A-1) and as component (B) a compound of formula (B-1). Compositions suitable for use in the invention are also disclosed. (A-1) is greater than (B-1).

The invention discloses a paenibacillus polymyxa S437 strain and an application thereof. The name of the bacterial strain is Paenibacillus polymyxa S437, and the preservation number of the bacterial strain is GDMCC No: 66085. The strain S437 has a good disease prevention effect on banana soft rot, and the disease prevention effect reaches 85% or above. The bacterial strain S437 has a wider antibacterial spectrum, and can effectively inhibit the growth of various pathogenic fungi and bacteria, such as fusarium, fusarium solani and the like which cause plant basal stem rot or fusarium wilt, colletotrichum which causes plant anthracnose, and alternaria, melanospora, interphaga, fusarium and the like which cause plant leaf spot bacteria; and S437 has a good antibacterial effect on banana soft rot bacteria. The strain S437 can avoid potential adverse effects of chemical pesticides on the environment and crop safety, and has potential commercial development and application values in biological prevention and control practice of diseases.

The present application provides an endophytic bacterial strain with a high camptothecin yield, which is Alternaria temuissima ZCMUKL-S1, deposited as CCTCC NO: M2021189, or Alternaria citricancri ZCMUKL-S2, deposited as CCTCC NO: M2021190, or Aspergillus versicolor ZCMUKL-S3, deposited as CCTCC NO: M2021191. The endophytic bacterial strain has a high yield of camptothecin, wherein the yield of camptothecin per unit dry mycelium powder of Aspergillus versicolor ZCMUKL-S3 is as high as 116 μg / g, which is the highest yield of camptothecin produced by endophytic bacterial strains reported at present, and has potential application value for its industrial production. In addition, the endophytic bacterial strain which can produce high camptothecin provided by the present application has good genetic stability.

The invention discloses a primer combination and a kit for detecting alternaria alternata and application of the primer combination and the kit. The primer combination comprises a primer pair and crRNA, wherein the nucleotide sequence of the primer pair comprises a sequence as shown in SEQ ID NO. 1 and a sequence as shown in SEQ ID NO. 2; the nucleotide sequence of the crRNA comprises a sequence as shown in SEQ ID NO. 7. The invention also provides a kit for detecting the alternaria alternata. According to the primer combination and the kit disclosed by the invention, accurate and rapid identification of the alternaria alternata can be realized; the detection sensitivity is extremely high; in addition, the method is simple and convenient to detect, can be used for field identification of alternaria alternata and can also be used for detection of access ports, so that the method has a wide application prospect.

The invention relates to the technical field of natural antibacterial compounds, in particular to an antibacterial compound, a preparation method and application thereof and a pesticide agent. The antibacterial compound is selected from compounds shown in the following structural formula: the compound has an inhibition effect on methicillin-resistant staphylococcus aureus and other drug-resistant bacteria, staphylococcus aureus, escherichia coli, salmonella, pseudomonas aeruginosa and other bacteria, and alternaria, fusarium, colletotrichum and other fungi; the compound can be applied as broad-spectrum antibacterial, broad-spectrum antifungal and drug-resistant bacterium resistant drugs.

The invention belongs to the technical field of agricultural microorganisms, and particularly relates to bacillus BFI-L3 with a broad-spectrum antibacterial effect and application of the bacillus BFI-L3. The invention discloses bacillus velezensis BFI-L3, which is bacillus velezensis, and the preservation number of the bacillus velezensis BFI-L3 is CGMCC (China General Microbiological Culture Collection Center) No.35399. The strain has broad-spectrum antibacterial activity, has a remarkable antibacterial effect on camellia anthracnose, botryosphaeria, alternaria and other pathogenic fungi, and can synchronously prevent and control the compound diseases of the tea garden. The strain also has plant growth promoting ability, VOCs generated by the strain can significantly promote the growth of arabidopsis thaliana, and high-quality microbial resources are provided for green prevention and control of tea gardens and biological prevention and control of plant diseases.

The application relates to a Burkholderia gladioli NDG19 and an application of the Burkholderia gladioli NDG19 in disease resistance, and belongs to the technical field of microorganisms. The Burkholderia gladioli NDG19 is preserved in the Guangdong Provincial Microbial Culture Collection Center on July 31, 2023, the strain preservation number is 63701, and the preservation address is No. 59 Building, 5th Floor, Guangzhou, Guangzhou, China. The Burkholderia gladioli NDG19 provided in the application can effectively inhibit the growth and reproduction of Fusarium oxysporum and Alternaria tenuis, and can effectively prevent and treat plant fusarium wilt such as sharp banana fusarium wilt and melon root rot of cucurbitaceae crops, solves the problems of environmental pollution and food safety caused by chemical fungicides, the strain has the functions of iron carrier production, phosphorus dissolution and potassium dissolution, can effectively improve the utilization rate of phosphorus and potassium in soil as a biological bacterial fertilizer, promotes the growth of plants, is safe and environment-friendly, and has a wide application prospect.

This invention discloses a lysinibacillus macroides bacterium that degrades Alternaria alternata toxins and its applications, belonging to the field of microbial technology. The lysinibacillus macroides is deposited at the China Center for Type Culture Collection (CCTCC), Wuhan University, Hubei Province, with accession number CCTCC No. M20241816. This invention is the first to obtain a lysinibacillus macroides bacterium that can effectively reduce and degrade Alternaria alternata toxins, which helps improve the quality of agricultural products (including aquatic products).

The invention discloses a biological treatment and recycling method for synchronously removing carbon and enriching lithium from oil and gas field produced water, which comprises the following steps: 1) inoculating microorganisms into a liquid culture medium, and culturing to obtain a microorganism culture solution or culture; 2) directly adding and / or treating the microbial culture solution and / or culture obtained in the step 1) and then adding the microbial culture solution and / or culture into a reactor filled with oil and gas field produced water to be treated; (3) operating the reactor in the step (2), degrading organic matters in the oil and gas field produced water by microorganisms and enriching lithium ions; and 4) separating the microorganisms from the oil and gas field produced water, and extracting lithium ions enriched in the microorganisms. Wherein the microorganism is selected from one or a combination of more of the following microorganisms: staphylococcus saprophyticus, penicillium fistulosum, bacillus altitudinis, alternaria tenuissima and aspergillus sydowii. According to the method, recycling of lithium is achieved while oil and gas field produced water is recycled / discharged after reaching the standard, and the method has important significance on the national ecological environment and the new energy strategy.

This invention relates to the field of biomedical detection technology, specifically to plasma circulating microbial biomarkers for early screening of gastric cancer and their applications. The plasma circulating microbial biomarkers include: *Ralstonia solanacearum*, *Staphylococcus aureus*, *Alternaria metachromatica*, *Porphyromonas gingivalis*, *Lactobacillus reuteri*, *Rhodococcus erythropolis*, *Akkermansia muciniphila*, *Lactobacillus gasseri*, *Bifidobacterium bifidum*, and *Neisseria gonorrhoeae*. This invention screens and, for the first time, combines 10 specific microbial biomarkers with Low Pass technology. WGS technology can achieve detection results at low depths, significantly reducing screening costs while ensuring detection sensitivity, and providing a brand-new solution for early gastric cancer screening.

The invention discloses an instant wrinkle-removing skin-care composition which comprises the following components in parts by weight: 1-5 parts of alteromonas fermentation product extract; 0.2 to 2 parts of an arnica flower extract; 0.02 to 0.2 part of arginine / lysine polypeptide; and 0.1 to 1 part of Euglena parvata (EUGLENA GRACILIS) polysaccharide. The invention also discloses an application of the instant wrinkle-removing skin-care composition in cosmetics. The instant wrinkle-removing skin-care composition provided by the invention can rapidly permeate into eye skin to achieve an instant wrinkle-removing effect, and the safety and the stability of the product are ensured while the composition is comparable with medical beauty.

The invention discloses a strain for degrading alternaria toxin and application of the strain, and relates to the technical field of microorganisms. The disclosed biocontrol bacterium MM14-1 is identified to be trichoderma harzianum through ITS, the trichoderma harzianum MM14-1 shows that the trichoderma harzianum MM14-1 has a good inhibition effect on growth of alternaria alternata in a degradation test on a liquid culture medium, the degradation rate reaches 96%, meanwhile, the degradation rate of an intracellular crude extract of the trichoderma harzianum MM14-1 on alternaria alternata toxin is 98.04%, and the trichoderma harzianum MM14-1 can be used for preparing the trichoderma harzianum. The intracellular crude extract of trichoderma harzianum MM14-1 can inhibit synthesis of alternaria tenuissima toxin, can be applied to prevention and treatment of alternaria tenuissima and alternaria tenuissima toxin, can overcome the problems of environmental safety, health safety and the like caused by use of chemical pesticides, is beneficial to pollution-free production of agricultural products, and can improve the product quality. According to the method, a strain capable of degrading alternaria toxin more efficiently, safely and stably is provided, and a breakthrough from bacterium prevention to detoxification is achieved.

The invention provides lactobacillus plantarum, lactobacillus paracasei, a complex microbial inoculant thereof and application of the complex microbial inoculant and the complex microbial inoculant in cherry fruit preservation, and belongs to the technical field of fruit and vegetable biological preservation. The lactobacillus plantarum TZ28 and the lactobacillus paracasei TZ13, which are screened out by the invention, have broad-spectrum antibacterial effects and have safety and excellent probiotic characteristics. The whole culture solution, the bacterial suspension and the cell-free fermentation supernatant of the lactobacillus plantarum TZ28 and the lactobacillus paracasei TZ13 can inhibit the alternaria alternata separated from the rotten cherries. A bacterial suspension formed by combining lactobacillus plantarum TZ28 and lactobacillus paracasei TZ13 according to a ratio of 1: 1 is used as a biological fresh-keeping agent, so that the decay rate and weight loss rate of cherry fruits can be effectively reduced, the content and hardness of soluble solids are maintained, the aging decay of cherries in the storage period is effectively slowed down, the quality of the cherries is obviously improved, the storage period of the fruits is prolonged, and the quality of the cherries is improved. The nutritional value and the health benefits of the cherry fruits are enhanced.

The invention discloses an alternaria alternata dispersible oil suspending agent as well as a preparation method and application thereof. The dispersible oil suspending agent comprises the following components in percentage by mass: 4-5% of alternaria alternata DT-DYLC spore powder, 16-18% of an emulsifier, 2-4% of a dispersing agent, 1-3% of a thickening agent and the balance of a dispersion medium, wherein the total mass percentage is 100%; wherein the emulsifying agent is selected from the group consisting of OF-4816; the dispersing agent is selected from the group consisting of 560EP or / and SP-OF3498D; the thickening agent is selected from any one or more than two of kaolin, sodium carboxymethyl cellulose and white carbon black; the dispersion medium is selected from soybean oil. According to the invention, the problems of high temperature and humidity sensitivity, insufficient spore environment stress resistance and the like of the existing alternaria alternate DT-DYLC as a fungal herbicide in practical application are solved, the environmental adaptability of the alternaria alternate DT-DYLC in the field can be improved, and the weeding effect is improved.

The invention relates to a preparation method of a mortierella alpina agent, which comprises the following steps: inoculating mortierella alpina into a culture medium for fermentation culture, centrifuging, and taking supernate; the name of the bacterial strain of the mortierella alpina is Mortierella alpina RS-01, and the preservation number of the mortierella alpina is CGMCC (China General Microbiological Culture Collection Center) No.41944. The invention further discloses a preparation method of the mortierella alpina. The mortierella alpina agent provided by the invention can be used for preventing and treating pathogenic bacteria of ginseng rust rot, pathogenic bacteria of muskmelon fusarium wilt, pathogenic bacteria of melon and fruit rot, pathogenic bacteria of apple fruit rot, pathogenic bacteria of northern corn leaf blight, pathogenic bacteria of seedling blight, pathogenic bacteria of walnut canker, pathogenic bacteria of poplar canker and pathogenic bacteria of pepper anthracnose; the compound has the best antibacterial effect on pathogenic bacteria of blueberry stem canker, pathogenic bacteria of apple shell monochromatic alternaria, pathogenic bacteria of tobacco brown spot, and especially pathogenic bacteria of ginseng rust rot.

The invention belongs to the technical field of fermentation engineering and plant disease prevention and control, and particularly relates to pseudomonas veronii and application thereof in prevention and control of plant fungal diseases. The invention discloses Pseudomonas veronii JD003 with the preservation number of CGMCC (China General Microbiological Culture Collection Center) No.36825. The test shows that the Pseudomonas veronii JD003 can effectively inhibit the growth of tomato root rot, grape botrytis cinerea, colletotrichum capsici and alternaria capsici, and can effectively inhibit the growth of the tomato root rot, the grape botrytis cinerea, the colletotrichum capsici and the alternaria capsici. The compound provided by the invention has the advantages that the inhibition effects on the corresponding pathogenic microorganisms such as fusarium solani, botrytis cinerea, colletotrichum oxysporum and alternaria hexabarzicola respectively reach 64.7%, 72.9%, 74.1% and 73.8%, the compound has a good inhibition effect on pepper anthracnose, the field prevention and control effect reaches 83.5%, and a new direction is found for preventing and controlling plant diseases.

This invention belongs to the field of daily chemical products technology, and particularly relates to a moisturizing composition, its preparation method, and its application. The moisturizing composition comprises soybean lecithin, *Alnus macrocarpa* seed oil, *Klebsiella macrocarpa* extract, and *Alternaria rubra* extract, wherein the mass ratio of soybean lecithin, *Alnus macrocarpa* seed oil, *Klebsiella macrocarpa* extract, and *Alternaria rubra* extract is (1-5):(1-10):(0.1-3):(0.5-5). Compared with existing technologies, this invention uses multiple plant extracts as active ingredients, employing a compounding of *Alnus macrocarpa* seed oil, *Klebsiella macrocarpa* extract, and *Alternaria rubra* extract, resulting in a synergistic effect of multiple active ingredients for multi-faceted moisturizing.

The invention discloses alternaria BP-1 and application thereof, and belongs to the technical field of microorganisms. The preservation number of the alternaria BP-1 is CGMCC (China General Microbiological Culture Collection Center) NO.41528. The alternaria BP-1 can be used for preventing and controlling weed bolboschoenus planiculmis in paddy fields. The alternaria BP-1 provided by the invention is separated from naturally diseased leaves of weeds in a paddy field, and the strain is separated from the natural environment, so that the ecological safety problem is not caused. The alternaria BP-1 can infect weed bolboschoenus planiculmis and is high in pathogenicity, obvious leaf disease spots can be formed 7 days after inoculation, and the purpose of effectively controlling weeds is achieved along with expansion of the disease spots. The bacterium is safe to rice and high in specificity, and has great development potential in prevention and treatment of rice field weed bolboschoenus planiculmis.