67 results about "Physalospora" patented technology

The invention relates to dihydroxyl quaternary ammonium salt with antimicrobial activity as well as a preparation method and application of the dihydroxyl quaternary ammonium salt, belonging to the field of antibacterial materials and preparation methods. The preparation method comprises steps of carrying out reaction on N-R1-diethanol amine and halogenated hydrocarbon (R2-X) in an organic solvent, after precipitation of the precipitator, recrystallizing repeatedly so as to obtain the dihydroxyl quaternary ammonium salt (N-R1-N-R2-N,N-diethoxy ammonium halide). The quaternary ammonium salt is simple to synthesize, has high yield and low cost, has high reaction speed and simple and convenient purification method. The dihydroxyl quaternary ammonium salt has good capacity in resisting both various bacteria such as escherichia coli and various funguses such as physalospora piricala, and has good application prospect.

The invention provides a bactericidal composition containing tetramycin and zhongshengmycin. The bactericidal composition comprises compounded effective components consisting of tetramycin and zhongshengmycin, with the balance being auxiliary components. The mass ratio of tetramycin to zhongshengmycin in the composition is 1-50 50-1, and the mass fraction of tetramycin and zhongshengmycin in a preparation is 1 to 80%, with the balance being auxiliary components which are allowed to use and admitted in pesticides; dosage forms of the composition comprise missible oil, a suspending agent, a wettable powder, a water dispersible granule, an emulsion in water, a micro-emulsion, a granule and a micro capsule. The composition is mainly used for preventing and treating rot diseases of fruit trees, alternaria leaf spot, rice blast, soybean root rot, fusarium wilt of cucurbits, cotton verticillium wilt, rust diseases of jujube trees, white rot of grape, black spot of ginseng and pseudo-ginseng, Exobasidium vexans Massee of tea, forest rot, canker, gumming diseases, leaf cast, damping off of forest seedlings, soft rot bacteria of vegetable, Pseudomonas lachrymans, Xanthomonas oryzae pv. oryzae, Physalospora piricola, Fusarium graminearum, etc.

The invention discloses streptomyces deccanensis QY-3 and application thereof. The Latin name of the strain is streptomyces deccanensis, the number of the strain is QY-3, the strain is collected in CGMCC (China General Microbiological Culture Collection Center), and the collection number is CGMCC No.14467. The streptomyces deccanensis QY-3 disclosed by the invention has broad-spectrum activity forresisting to plant pathogenic fungi, has obvious inhibition effects on plant pathogenic fungi such as colletotrichum gloeosporioides, colletotrichum musae, banana fusarium oxysporum, fusarium graminerum, cucumber fusarium wilt, dragon fruit fusarium, dragon fruit rot pathogens, physalospora piricola, phomopsis mangiferae or guava pestalotiopsis, and especially has good prevention and treatment effects on colletotrichum gloeosporioides of rubber trees, so that the streptomyces deccanensis QY-3 is bio-control actinomyces strain with great development potential.

The invention belongs to the field of chemical engineering and pesticides, and particularly relates to a heterocyclic compound containing bis(2-substituted sulfonyl-1,3,4-oxadiazole-5-radical) and application thereof. The structure of the heterocyclic compound is shown in the specification. In a general formula, R is hydrogen, C1-C5 alkyl radicals, C1-C5 halogenated alkyl radicals, C2-C5 alkenyl, and ester, benzyl or substituted benzyl of C2-C5, and Z is hydrocarbyl or substituted hydrocarbon thereof, phenyl, substituted phenyl, biphenylyl, substituted biphenylyl, naphthyl, substituted naphthyl, diphenyl hydrocarbyl, substituted diphenyl hydrocarbyl, and diphenyl ether or substituted diphenyl ether. The heterocyclic compound has very good inhibitory activity on rhizoctonia solani, fusarium asiaticum, borrytis cinerea, physalospora piricala, helminthossporium oryzae, tobacco bacterial wilt and rice brown blotches, can be applied to prevention and control of plant diseases and has wide application prospect.

The invention discloses a drug for preventing and treating gummosis. The drug contains the following ingredients in parts by weight: 10-15 parts of 50% alkaloid-gardenoside, 8-12 parts of 70% Baume-degree lime-sulfur mixture, 10-15 parts of 70% mancozeb wettable powder, 4-8 parts of icariin, 4-8 parts of hypericin, 6-10 parts of forsythin, 4-8 parts of bupleurum roots and 6-10 parts of artemisia annua. The drug is simple in proportion and convenient in use, and the treatment effect on peach tree gummosis is good; shown by testing, the solution of a volume which is 400-600 times that of a mixture has an obvious inactivation effect on botryosphaeria and peach physalospora (belonging to ascomycotina) and has a good bactericidal effect.

The invention relates to a physalospora piricola nose resistance identification method, in particular to a method for rapidly identifying resistance of apple branches and trunks to the physalospora piricola nose. The physalospora piricola nose is inoculated to a PDA culture medium to be cultured so that a physalospora piricola nose culture medium bacterial colony can be obtained; pseudo identified varieties or rootstock young sprout leaves without plant diseases or insect pests at the top end, the front faces of the leaves are stabbed by an inoculating needle, and then the physalospora piricola nose is inoculated; after the bacteria-bearing leaves are cultured for six days, the diameters of disease spots of the leaves are measured according to a crossing method, the disease spot area of the leaves are worked out and compared with the disease spot areas of known resistance grade materials, and the grade of resistance of varieties to be identified or rootstocks to the branch and trunk physalospora piricola nose is determined. According to the method for rapidly identifying the resistance of apple branches and trunks to the physalospora piricola nose, leaves are inoculated, infection conditions suitable for the physalospora piricola nose are created, physalospora piricola nose resistance identification is performed on the infection result, few identification materials are needed, identification time is short, repeatability is high, and the identification method is simple, easy to master and popularize, and low in cost.

An anti-phytopathogenic fungi activity psoralen flavanone relates to a compound, in particular to anti-phytopathogenic fungi activity psoralen flavanone. The preparation process of the compound comprises drying psoralen seeds, coldly soaking and extracting industrial alcohol four times, decompressing and condensing leachate to obtain alcohol extract, mixing solution with appropriate amount of water, extracting with petroleum ether and acetic acid ethyl ester in turn, taking acetic acid ethyl ester to extract position extract, conducting silica gel column chromatography, eluting in gradient with petroleum ether-acetic acid ethyl ester, separating to obtain psoralen flavanone (petroleum ether: acetic acid ethyl ester =85:15). The compound can be used as bactericide to prevent various plant diseases such as valsa mali, physalospora piricola nose, pyricularia oryzae, rhizoctonia solani AG-1 IA, cucumber fusarium oxysporum, gibberella zeae, cucumber anthracnose and phytophthora parasitica and the like.

The invention relates to a bactericide composition comprising folpet and sedaxane and application of the bactericide composition, wherein the weight ratio of folpet to sedaxane is (1:50) to (50:1), preferentially (1:10) to (20:1), and more preferentially (1:10) to (10:1); the bactericide composition can be prepared into a water dispersible granule, an emulsion in water, a microemulsion, a water suspension, a wettable powder, a seed coating and the like, and is used to prevent and treat smut, tarspotdisease, gray mold, leaf spot diseases, powdery mildew, physalospora piricola, early blight and late blight, a quite excellent synergistic effect is produced after the folpet and the sedaxane are compounded in a certain ratio scope, the sterilizing effect is obviously improved in comparison with that of a single dosage, so that the usage amount of a bactericide is reduced, the influence on the environment is reduced while the pesticide cost of a farmer is lowered.

The invention relates to a bactericidal composition containing tetramycin and kasugamycin. The bactericidal composition is characterized by taking tetramycin and kasugamycin as active ingredients forbinary compounding, the mass ratio of the tetramycin to the kasugamycin as the active ingredients in the pesticide composition is (1-50):(50-1), the total mass percentage content of the tetramycin andthe kasugamycin as the active ingredients in the preparation accounts for 1-80 percent, and the rest is auxiliary ingredients allowed to be used and accepted in pesticides. Dosage forms of the pesticide composition are an emulsifiable concentrate, a suspending agent, wettable powder, water dispersible granules, an emulsion in water, a micro-emulsion, granules and microcapsules. The bactericidal composition is mainly used for controlling fruit tree rot diseases, Alternaria mali Roberts, rice blast, soybean root rot diseases, cucurbits fusarium wilt, cotton verticillium wilt, jujube rust diseases, grape white rot diseases, ginseng and pseudo-ginseng black spot disease, tea cake diseases, forest rot, canker diseases, leeding diseases, deciduous leaf diseases, forest seedling stage damping-off, erwinia aroideae, pseudomonas lachrymans, xanthomonas oryzae, physalospora piricola, fusarium graminearum and the like.

The invention discloses a sterilization composition containing enziothiazolinone and kasugamycin. The sterilization composition comprises enziothiazolinone and kasugamycin as active ingredients and other auxiliary components. A mass ratio of benziothiazolinone to kasugamycin as active ingredients in the sterilization composition is 1-50: 50-1. The sterilization composition comprises 1-80% by mass of benziothiazolinone and kasugamycin and the balance pesticide allowable and acceptable auxiliary components. The sterilization composition can be processed to form missible oil, a suspending agent, wettable powder, water dispersible granules, emulsion in water, micron-emulsion, granules and a microcapsule and is mainly used for preventing and treating fruit tree canker, alternaria leaf spot, rice blast, soybean root rot, cucurbits fusarium wilt, cotton verticillium wilt, jujube tree rust, grape white rot, ginseng and pseudo-ginseng black spot, tea blister blight, tree rot, canker, bleeding disease, leaf cast, seedling blight, Erwinia aroideae, Pseudomonas lachrymans, bacteria of rice leaf blight, Physalospora piricola Nose of apple and fusarium graminerum.

Provided is a sterilization composition containing N,N-dioctyl-diethylenetriamine and zhongshengmycin. Effective ingredients N,N-dioctyl-diethylenetriamine and zhongshengmycin of the sterilization composition are in binary combination, and the balance is auxiliary ingredients. The mass ratio of the effective ingredients N,N-dioctyl-diethylenetriamine and zhongshengmycin in the sterilization composition is (1:50)-(50:1), the mass percentage of the effective ingredients N,N-dioctyl-diethylenetriamine and zhongshengmycin in the preparation is 1-80%, and the balance is auxiliary ingredients allowable and acceptable in pesticide. The dosage forms of the sterilization composition comprise missible oil, a suspending agent, wettable powder, water dispersible granules, emulsion in water, microemulsion, granules and microcapsules. The sterilization composition is mainly used for preventing and treating fruit tree rot disease, alternaria leaf spot, rice blast, soybean root rot, melon blight, cotton verticillium wilt, date tree rust disease, grape white rot, black spot on panax notoginseng, tea blister blight, forest rot disease, canker, bleeding disease, leaf cast, forest seedling stage damping off, erwinia aroideae, pseudomonas lachrymans, bacteria of rice leaf blight, apple physalospora piricola germs and wheat gibberella saubinetii and the like.

The invention discloses a pseudomonas syringae strain B-1. The pseudomonas syringae strain B-1 is preserved in the China Center for Type Culture Collection (CCTCC), and the preservation number of thepseudomonas syringae strain B-1 is CCTCC NO: M2015813. The pseudomonas syringae strain B-1 disclosed by the invention has a remarkable prevention and treatment effect on apple ring rot; research of embodiments indicates, the strain B-1 can obviously inhibit the growth of physalospora piricola hyphae; the antibacterial spectrum is wide, and besides the apple ring spot bacteria, the obvious antagonism effect on various fruit and vegetable pathogenic fungi such as fruit and vegetable postharvest botrytis cinerea, fruit and vegetable postharvest penicillium bacteria, apple tree valsa mali, pear tree valsa mali, apple anthracnose leaf blight bacteria, apple mold heart bacteria and peach brown rot bacteria is also achieved; bacterial suspension and fermented supernatant of the bacterial strain B-1 have prevention and treatment effects on apple branch and trunk and fruit ring rot of 70% or above, the bacterial strain B-1 has the characteristics of being stable in prevention and treatment effect, environmentally friendly and the like, the fermentation process of large-scale production is simple, and the production cost is low.

The invention discloses a drug for resisting peach tree gummosis. The drug contains the following ingredients in parts by weight: 10-15 parts of 50% ultramicro carbendazim wettable powder, 8-12 parts of 70% ultramicro thiophanate-methyl wettable powder, 10-15 parts of 72% Dupont curzate wettable powder, 4-8 parts of stachydrine, 4-8 parts of hypericin, 6-10 parts of total anthraquinone, 4-8 parts of double coptis chinensi and 6-10 parts of radix isatidis. The drug is simple in preparation and convenient in use, and the treatment effect on peach tree gummosis is good; shown by testing, the solution of a volume which is 400-600 times that of a mixture has an obvious inactivation effect on botryosphaeria and peach physalospora (belonging to ascomycotina), and has a good bactericidal effect.

The invention relates to a method for extraction of an active metabolite from a Streptomyces corchorusii NF0919 strain (with a preservation number of CGMCC No.3968 in CGMCC and a strain patent number of ZL201010236886.1) fermentation broth. The metabolite can effectively prevent and treat Venturia nashicola (also known as pear scab) caused by plant pathogenic fungus Venturia piritna infection and Physalospora piricola Nose (also known as Pear perennial canker and Internal bark necrosis) caused by Physalospora piricola infection.

The invention discloses a sterilization composition containing benziothiazolinone and Zhongshengmycin. The sterilization composition comprises benziothiazolinone and Zhongshengmycin as active ingredients and other auxiliary components. A mass ratio of benziothiazolinone to Zhongshengmycin as active ingredients in the sterilization composition is 1-50: 50-1. The sterilization composition comprises 1-80% by mass of benziothiazolinone and Zhongshengmycin and the balance pesticide allowable and acceptable auxiliary components. The sterilization composition can be processed to form missible oil, a suspending agent, wettable powder, water dispersible granules, emulsion in water, micron-emulsion, granules and a microcapsule and is mainly used for preventing and treating fruit tree canker, alternaria leaf spot, rice blast, soybean root rot, cucurbits fusarium wilt, cotton verticillium wilt, jujube tree rust, grape white rot, ginseng and pseudo-ginseng black spot, tea blister blight, tree rot, canker, bleeding disease, leaf cast, seedling blight, Erwinia aroideae, Pseudomonas lachrymans, bacteria of rice leaf blight, Physalospora piricola Nose of apple and fusarium graminerum.

The invention discloses an application of itraconazole in the preparation of fungicides for the prevention and control of plant pathogenic bacteria. Experiments prove herein that the itraconazole hasgood inhibitory activity against the main diseases of important grain crops, including fusarium graminearum causing wheat scab, magnaporthe oryzae causing rice blast, rhizoctonia cerealis causing sheath blight and curvularia maize causing maize leaf spot; moreover, the itraconazole has good inhibitory activity against the physalospora piricola causing apple ring rot, valsa mali causing apple rot and alternaria tenuifolia causing leaf spot disease of fruits and vegetables; the itraconazole also has good inhibitory activity against soil-borne diseases that are extremely difficult to prevent andcontrol in agricultural production, such as fusarium oxysporum causing blight, and the inhibitory activity is even better than those of traditional fungicides such as carbendazim and tebuconazole. Forthe first time, the itraconazole, a green small-molecular compound screened through three-dimensional structures of target proteins, is applied to the prevention and control of important plant diseases in agricultural production and has a good market application prospect.

The invention relates to a trifluoromethylthio-containing tryptamine derivative I and a preparation method thereof, and application of the trifluoromethylthio-containing tryptamine derivative I in prevention and treatment of plant viruses and pathogenic bacteria. According to the invention, the trifluoromethylthio-containing tryptamine derivative I shows anti-plant virus activity, wherein the inhibition rate of the derivative containing chlorine atoms in the structure on tobacco mosaic virus (TMV) can reach the level equivalent to that of virazole; and the compound also shows certain anti-plant pathogenic bacterium activity, and has relatively good inhibitory activity on physalospora piricola.

The invention provides Taxodium hybrid 'zhongshanshan' essential oil and an application thereof to inhibition of plant pathogens. The Taxodium hybrid 'zhongshanshan' essential oil is prepared from leaves of Taxodium hybrid 'zhongshanshan' by extraction with a steam distillation method, and the essential oil has a good inhibition effect on the plant pathogens such as curvuloria lunata of rice, alternaria alternata, valsa mali, physalospora piricola, rhizoctonia solani, rhizoctonia solani kuha, colletotrichum gloeosporioides of ophiopogon japonicus, sclerotinia sclerotiorum, gaeumannomyces graminis and fusarium oxysporum vasinfectum.

The invention discloses a simple method for rapidly detecting physalospora piricola infection amount in apple branches, and relates to a rapid detection technology for pathogen infection amount in plants. The method is suitable to detect pathogen quantity of living apple branches whose diameter at the base is smaller than 3 cm. The specific method comprises: girdling a cortex on the base of a to-be-detected branch, width being 2-10 mm; using a paraquat liquor whose active ingredient content is 60 g/L - 100 g/L to soak absorbent paper, degreasing cotton, and cotton threads or cloth strips, after taking the absorbent paper, the degreasing cotton, and the cotton threads or cloth strips out and draining, winding the absorbent paper, the degreasing cotton, and the cotton threads or cloth strips on a girdling opening position, using an adhesive tape or a plastic film to wrap tightly; from the third day after processing, inspecting and recording the number of lenticels which are diseased and not diseased on the branches, and whether a necrosis cortex generates pycnidium or not. The method is advantaged in that the method detects clearly whether apple branches have potential physalospora piricola in 1-2 weeks, and the quantity of potential pathogen, and the method is simple in operation method and reliable in detection result, and solves a problem that a conventional survey cannot detect physalospora piricola infection amount in branches.

The invention discloses a manufacturing method for a gummosis bacteria prevention drug. The manufacturing method comprises the following steps: A. preparing materials: preparing 50 percent Liang Guoan, 70 percent baume lime sulphur, 70 percent mancozeb wettable powders, icariin, hypericin, phillyrin, radix bupleuri and artemisia carvifolia; B. carrying out alcohol leaching for extracting solutions of radix bupleuri and artemisia carvifolia; C. compounding the 50 percent Liang Guoan, the 70 percent baume lime sulphur, the 70 percent wettable mancozeb powders, the icariin, the hypericin and the phillyrin with the extraction solutions obtained from Step B, stirring the compound uniformly, and carrying out ultraviolet sterilization to obtain the drug for pseudomonas solanacearum resistance. The manufacturing method provided by the invention is simple, that is, the manufacturing method for the manufactured product is simple, and the proportioning of the manufactured product is simple; the use is convenient; the treatment effect for peach tree gummosis is remarkable; a 400-times to 600-times diluent of the mixture is proved, by the experiments, to have obvious inactivation effects for botryosphaeria and peach physalospora (belonging to Ascomycotina in the kingdom Fungi), and the sterilizing effect is good.

The invention discloses a method for controlling physalospora piricola nose of apple trees, belongs to the field of methods for controlling diseases of fruit trees, and aims to provides a method being convenient and easy to operate, low in cost, and good in disease resistance for controlling diseases of apple trees. The method includes scraping burls and old raised barks on a trunk after leaves fall in autumn, and coating 5 Be lime sulphur on scraped portions; coating 5Be lime sulphur on the scraped portions again in next spring; spraying a bordeaux mixture and 0.2 Be lime sulphur in an alternating mode after flowers on the apple trees fall until the first ten-day period of September, wherein the interval time between spraying of the bordeaux mixture and spraying of the 0.2 Be lime sulphur is 15 to 20 days. The lime sulphur is boiled by the following raw materials, by weight, 1 part of calcium oxide, 10 parts of sulphur and 100 parts of water. By using the method for controlling physalospora piricola nose of apple trees, diseases do not generate resistance, the effective rate of disease resistance and pest killing reaches up to approximately 90%. The invention provides the method for controlling physalospora piricola nose of apple trees.

The invention belongs to the technical field of plant protection, and concretely relates to a preparation method and a use of organic metal complex crystals. The organic metal complex crystals are prepared from 2,2'-bis(ortho-chlorophenyl)-4,4',5,5'-tetraphenyl-1,2'-biimidazole, glycine and acetylacetone metal salt. The organic metal complex crystals have a crop disease control effect, and is especially used for controlling Botrytis cintrea, Colletotrichum nicotianae, cotton wilt fusarium, Physalospora piricola and Bipolaria maydis.

The invention discloses a sterilization composition containing thiabendazole and polyoxin. Effective components are the thiabendazole and the polyoxin, the weight ratio of the thiabendazole to the polyoxin ranges from 15:1 to 1:10, preferably, the weight ratio ranges from 10:1 to 1:2, further preferably, the weight ratio ranges from 5:1 to 1:2, and more preferably, the weight ratio ranges from 3:1to 1:1. The sterilization composition can further contain permissible and acceptable auxiliary materials in pesticide science, and dosage forms can be wettable powder, suspending agents, emulsion inwater, water dispersible granules and microemulsion. The sterilization composition is applied to control of fruit and vegetable storage diseases which are selected from gray mold, anthracnose, ring spot and penicilliosis. The action mechanisms of the thiabendazole and the polyoxin serving as the effective components of the sterilization composition are totally different, the thiabendazole and thepolyoxin have obvious synergistic effects when being compounded, bactericidal activity for botrytis cinerea, physalospora piricola nose and anthracnose can be improved, bactericide resistance is delayed, the preservative and fresh-keeping effects of fruit and vegetable products are more remarkable, and the economic value of the fruit and vegetable products is improved.

The invention discloses a bactericidal composition containing coumoxystrobin and zhongshengmycin. The bactericidal composition contains effective components, namely the coumoxystrobin and the zhongshengmycin which are compounded and the balance of auxiliary components, wherein the mass ratio of the coumoxystrobin to the zhongshengmycin serving as the effective components in a pesticide compositionis (1 to 50) to (50 to 1); the mass percentage of the coumoxystrobin and the zhongshengmycin as the effective components in a preparation is 1 to 80 percent, and other components are pesticide allowable and acceptable auxiliary components. The pesticide composition disclosed by the invention adopts dosage forms of emulsifiable concentrate, suspending agents, wettable powder, water dispersible granules, emulsion in water, microemulsion, granules and microcapsule formulation and is mainly used for preventing and controlling applet tree canker, alternaria leaf spot, rice blast, soybean root rot,cucurbits fusarium wilt, cotton verticillium wilt, jujube rust, grape white rot, panax notoginseng black spot, tea blister blight, tree canker, canker, bleeding disease, defoliation, forest seedlingdamping off, erwinia aroideae, pseudomonas lachrymans, xanthomonas oryzae pv. oryzae, physalospora piricola nose, fusarium asiaticum and the like.

Provided is a sterilization composition containing zhongshengmycin and moroxydine hydrochloride. Effective ingredients zhongshengmycin and moroxydine hydrochloride in the sterilization composition are in binary combination, and the balance is auxiliary ingredients. The mass ratio of the effective ingredients zhongshengmycin and moroxydine hydrochloride in the preparation is (1:50)-(50:1), the mass percentage of the effective ingredients zhongshengmycin and moroxydine hydrochloride in the preparation is 1-80%, and the balance is auxiliary ingredients which are allowed to be used and acceptable in pesticide. The dosage forms of the sterilization composition comprise missible oil, a suspending agent, wettable powder, water dispersible granules, emulsion in water, microemulsion, granules and microcapsules. The sterilization composition is mainly used for preventing and treating fruit tree rot disease, alternaria leaf spot, rice blast, soybean root rot, melon blight, cotton verticillium wilt, date tree rust disease, grape white rot, black spot on panax notoginseng, tea blister blight, forest rot disease, canker, bleeding disease, leaf cast, forest seedling stage damping off, erwinia aroideae, pseudomonas lachrymans, bacteria of rice leaf blight, apple physalospora piricola germs and wheat gibberella saubinetii and the like.

The invention relates to a 4-phenyl para-aldoxime ether-containing oxazoline compound as shown in the general formula (I), preparation of the compound and an application of the compound in pesticides. The compound represents a novel concise, wide-spectral and high-efficiency insecticidal anti-mite bactericidal herbicide structure type. When used as a novel insecticidal anti-mite bactericidal herbicide, the 4-phenyl para-aldoxime ether-containing oxazoline compound can greatly control oriental armyworm, cotton bollworm, corn borer, plutella xylostella, beet armyworm and mosquito larvae, can greatly control Tetrangychus cinnabarinus, can greatly inhibit ten pathogenic bacteria including cucumber fusarium wilt, Cercospora arachidicola, Physalospora piricola Nose, Alternaria solani, Fusarium graminearumt, late blight of potato, sclerotinia sclerotioru, Botrytis cinerea, rice sheath blight and phytophthora capsici, and can control and eliminate weeds including rape, amaranth, barnyard grass and crab grass, wherein the meaning of R is as shown in the specification.

The invention provides a hawthorn physalospora piricola preventing and controlling method and belongs to the field of prevention and control of diseases and pests of fruit trees. For different hawthorn growth and development stages, different protective solutions are prepared in several time periods including the period before complete blossom fall, the middle ten days and the last ten days of June, the middle ten days and the last ten days of July and the middle ten days and the last ten days of August to conduct multiple times of protective sterilization spraying on hawthorn trees and achieve the purpose of effectively preventing and controlling the physalospora piricola, meanwhile physalospora piricola nose is prevented from producing pesticide resistance, and a preventing and controlling effect lasts for a long period of time.

The invention discloses application of posaconazole to preparation of a bactericide for controlling plant pathogenic bacteria. Determination of indoor drug sensitivity proves that the posaconazole hasgood activity in inhibiting main diseases of important food crops, including wheat scab-causing fusarium graminearum, rice blast-causing magnaporthe oryzae, sheath blight-causing rhizoctonia cerealisand corn leaf spot-causing maize curvularia, has good activity in inhibiting botrytis cinerea, physalospora piricola, valsa ceratosperma and alternaria tenuissima, and has relatively good activity ininhibiting soil-borne diseases such as fusarium oxysporum, which are extremely difficult to control in agricultural production, and the bacteriostatic activity of the posaconazole is even superior tothose of the conventional bactericides carbendazim and tebuconazole. The invention proposes screening of the green small molecular compound posaconazole from the three-dimensional structure of targetprotein for the first time, and the posaconazole is applied to control of important plant diseases in the agricultural production and has a broad market application prospect.