87 results about "Pyricularia grisea" patented technology

The invention discloses bacillus subtilis NB12, as well as a culture method and an application thereof. The strain with a preservation number of CGMCC No.5383 is preserved in China General Microbiological Culture Collection Center on October 24, 2011. Researches prove that: the strain has strong inhibition effects to rhizoctonia solani, colletotrichum musae, pyricularia grisea, fusarium graminearum, fusarium oxysporum f.sp.cubense, peronophythora litchi, ustilago scitaminea, fulvia fulva, xanthomonas oryzae and xanthomonas oryzae pv.oryzicola, is a broad-spectrum antagonistic strain, can be used for prevention and control of various plant diseases, has a particular good prevention and control effect to the rice sheath blight and damping off in seedling phase of cowpea, has the advantages of harmlessness to human and livestock, greenness and safety, good environment compatibility, difficult resistance generation and the like, can be used for commercial development, and has a wide application prospect.

The invention discloses an oleanolic acid oxime ester derivate compound, a preparation method and an application thereof. The structural formula of the compound is shown in formula I, and in the formula I, R refers to furyl, pyridyl, 1-menaphthyl, 4-chlorophenoxy methyl or phenyl with 1 to 2 substitutional groups; and the substitutional groups in phenyl with 1 to 2 substitutional groups are halogen (such as fluorine, chlorine, bromine and iodine) or nitryl. The preparation method comprises the following steps: 1) performing the esterification reaction between oleanolic oxime subject to benzylation protection and substituted carboxylic acids to prepare an oxime ester compound; and 2) removing benzylation protection on the oxime ester compound by Pd/C-H2 to prepare the compound in the formula I. The bactericidal activity test result shows that CAU2012-A has a favorable effect of inhibiting growth of sclerotinia scleotiorum, phytophthora melongenae, botrytis cintrea, pyricularia grisea, rhizoctonia solani and cotton fusarium wilt.

The invention of molecular labeling method of Pyricularia grisea avirulent gene belongs to the field of agricultural biotechnology. The molecular labeling technology includes performing molecular labeling to avirulent gene though assessment from two parental strains and filial generation groups of Pyricularia grisea. M355-356 labeled by SSR near NO. 1 chromosome telomere links with avirulent gene Avr-Pit with a genetic distance of 2.3cm; S487 labeled by RAPD located near NO. 7 chromosome telomere links with avirulent gene Avr-Pia with a genetic distance of 3.5cm; S361 labeled by m677-678 and RAPD located at middle of N0. 3 chromosome telomere links with Pyricularia grisea specified avirulent gene PRE1 with genetic distances of 5.9cm and 6.4. The invention can not only make use of the nontoxic gene marker as gene probe, but also set foundations for further clone of the gene through physical mapping.

The invention provides a biological pesticide by using psoralidin to control plant fungous disease. The invention relates to a plant used biological pesticide, in particular to biological pesticide by using psoralidin to control plant fungous disease. Compound is dried Guzhi seed 5Kg. The compound is quenched and extracted four times by using 70 percent of industrial ethanol. After lixivium is decompressed and condensed, ethanol extract is gained. Water is added and mixed with the ethanol extract. Mixture is extracted by using petroleum ether and ethyl acetate in turn. 100g of ethyl acetate extraction part extract is taken, and processed chromatography over again by silica gel column, and processed gradient elution by petroleum ether-ethyl acetate and are separated, and then psoralidin (50mg) is gained (the ratio between the petroleum ether and ethyl acetate is 4 to 1). The invention can restrain common plant pathogen, like apple decay pathogen, apple macrophoma kawatsukai, pyricularia grisea, rice sheath blight fungus, cucumber fusarium wilt, wheat scab pathogen, cucumber anthracnose, phytophthora parasitica and so on.

The invention relates to a method for simply and rapidly identifying the resistance of the pyricularia grisea. The method comprises the steps of: extracting a heading rice plant from the rice field, respectively taking rice internode stems with lengths of not less than 5cm above and below an internode by using the internode of a spike neck for later use; placing degreasing cotton in a moisturizing plastic box, irrigating 8-10ml of spore suspension solution each milliliter of which contains 0.6 millions pyricularia grisea; and placing the rice internode stems to be detected on the degreasing cotton, moisturizing and cultivating for 14 days at a temperature of 25-26 DEG C so that scabs which can be fully identified can be formed, wherein sizes and invasion degrees of the scabs are divided into five levels, the rice internode stems with 0-level or 1-level morphological characteristics are of a disease-resistant type R, the rice internode stems with 4-level morphological characteristics are of a disease-susceptible type S, and the rice internode stems with 2-level or 3-level morphological characteristics are of a middle type M. Identification can be carried out indoors by using a stem node inoculating method, thus errors caused by identification under the natural condition in the field are avoided. The method does not need equipment, and is simple and easy to operate and strong in practicability.

The invention belongs to the field of biological pesticides, and discloses a sugarcane endophytic bacillus amyloliquefaciens RGB15 strain and an application thereof. The bacillus amyloliquefaciens CGB15 strain is preserved in the Guangdong Province Microbial Culture Collection Center on October 17, 2019, and the preservation number is GDMCC No: 60742, and the preservation address is the 5th floorof No.59 building of No.100 courtyard of the Xianlie Middle Road of Guangzhou city. The bacillus amyloliquefaciens RGB15 strain has a strong inhibition effect on ustilago scitaminea, pyricularia grisea, peronophythora litchii, colletotrichum litchii and banana fusarium oxysporum, and has an excellent biological control effect. A microbial preparation prepared from the strain is simple in preparation and use method, has broad-spectrum disease resistance, has little influence on the ecological environment, does not influence the crop quality, and has an excellent application prospect.

The invention provides a set of production technology for preventing ralstonia solanacearum from growing and reproducing in solanaceae crops to increase crop yield by aiming at the defects of the prior art for controlling the damages of the ralstonia solanacearum to the crops. Brevibacillus choshinensis X23 has a wide bacteriostatic spectrum and good environmental safety and has antagonism effects to various pathogenic fungi, such as phytophthora parasitica var nicotianae, pyricularia grisea, alternaria alternate, phytophthora infestans and the like, so that the brevibacillus choshinensis X23 has favorable development prospect and application potential.

The invention discloses a pesticide composition containing oxine-copper and kasugamycin, and an application thereof. The composition comprises oxine-copper, kasugamycin and common assistants, and a weight ratio of the oxine-copper to the kasugamycin is (1-60 ):(1-20). The oxine-copper and the kaempromycin have significant synergistic effect after being compounded, and the doses of effective components of the above compounded medicament are obviously lower than those of individually used effective components, so the pesticide composition ahs the characteristics of synergistic effects, delaying of drug resistance, enlarged control range, good control effect, small dose and low agricultural cost. The composition is suitable for controlling most fungal diseases, and especially Pyricularia grisea, bacterial leaf streak, watermelon bacterial angular leaf spot disease and citrus ulcer disease.

The invention discloses an entomopathogenic nematode symbiotic bacteria strain for inhibiting various plant fungal diseases and application. The bacteria strain is a high-toxicity bacteria strain NN6of xenorhabdus bovienii, the preservation number is CCTCC NO: M 2020097, and the bacteria strain is preserved in China Center for Type Culture Collection on April 29, 2020. The xenorhabdus bovienii NN6 disclosed by the invention has relatively strong ability of inhibiting growth of fusarium oxysporum f.sp.niveum, fusarium oxysporium f.sp.cucumerinum, fusarium graminearum, pyricularia grisea, botrytis cinerea and phytophthora capsici hypha, the ability is increased along with the increase of volume concentration, and the antibacterial effect is obvious. The bacteria strain also has the effect of inhibiting the germination of fusarium spores, and the inhibition effect is remarkable. The bacteria strain has the characteristics of low culture condition requirement, long lasting period, environment-friendly and non-toxic source and the like, has important significance in protecting the ecological environment and improving the added value of agricultural products, and has good market development and application prospects due to the advantage of wider antibacterial spectrum.

The invention discloses a loquat endophytic unciform trichoderma strain and applications of the loquat endophytic unciform trichoderma strain. The endophytic trichoderma strain is obtained through separation, then morphological and molecular biological identification is carried out, meanwhile, the antibacterial activity of the endophytic trichoderma strain is tested, and thus a material is provided for the development and utilization of the strain; the endophytic trichoderma strain has the antibacterial activity for five phytopathogens, wherein the inhibiting effect for fungi is obviously stronger than that for bacteria, specifically, the inhibiting effect for pyricularia grisea is the strongest and is 83.17%, the antibacterial rate for alternaria tenuissima takes the second place and is 75.10%, the antibacterial rates for fusarium proliferatum and fusarium sambucinum have no obvious differences and are respectively 52.02% and 49.07%, and the antibacterial rate for Xanthomonas oryzae pv.oyzae is the poorest, and is 38.24%. The trichoderma strain has the antibacterial wide spectrum, and has the development and utilization values and prospects.

The invention discloses cyclic dipeptide and application of the cyclic dipeptide in the preparation of a bactericide and belongs to the field of plant protection. The cyclic dipeptide is 3-isopropyl-pyrrolopiperazine-2,5-dione. Pathogen controlled by the bactericide is one or more than one of a group consisting of Botrytis cinerea, corynespora cassiicola, Ascochyta citrullina, Colletotrichum orbiculare, Pyricularia grisea, Candida albicans, Pellicularia, Fusarium oxysporum, Rhizoctonia solani, xanthomonas oryzae, aspergillus flavus and Fusarium moniliforme. The invention reports bactericidal activity of cyclo(L-proline-L-valine) for the first time and provides a new thinking for research and development of the bactericide. As a bactericide, the cyclic dipeptide cyclo(L-proline-L-valine) isderived from a secondary metabolite of Pseudomonas syringae, belongs to a natural product, is easy to degrade in the environment, and is not easy to cause harm o the environment.

The invention discloses a filamentous fungus promoter, a filamentous fungus terminator, and a plasmid containing the same. The filamentous fungus promoter has a base sequence represented by SEQ ID No.1, and the filamentous fungus terminator has a base sequence represented by SEQ ID No.2. The promoter of the invention is a strong promoter. The promoter has high-strength promotion effect in the hypha, spore and appresorium stages of pyricularia grisea. The promoter gene belongs to a gene of which the stability of the expression strength in cells of pyricularia grisea ranking in top 100. The gene is an important gene for removing active oxygen in cell and has a great significance for maintaining the normal operation of cells. The gene can be expressed in a large amount under the induction of active oxygen and is suitable for synthesizing a large amount of recombinant protein.

The invention discloses a 1,3,4-thiadiazole (oxadiazole)-phenazine-1-formamide compound. The structure of the compound is as shown in a formula (I), wherein R is at least one of hydrogen, halogen, nitryl, hydroxyl and alkyl or alkoxy of which the carbon atom sum is 1-4; and X is O or S. The 1,3,4-thiadiazole (oxadiazole)-phenazine-1-formamide compound disclosed by the invention is remarkably higher than shenqinmycin on the aspect of inhibiting the activity of fusarium graminearum, and the EC50 of a compound I-8 with the optimal activity is reduced by 95.29mu g . mL<-1> than that of PCA; and the compounds I-8 and I-22 are equivalent to shenqinmycin on the aspect of inhibiting the activities of rhizoctonia solani, Pyricularia grisea and phytophthora capsici. In addition, the preparation method provided by the invention is simple and rapid, high in yield and convenient for large-batch preparation in an actual production process.

The invention discloses a fungicide composition of fluoride containing ether bacteria amide and validamycin, which consists of active components and supplementary materials. The active components are fluoride ether bacteria amide and validamycin, the weight ratio of fluoride ether bacteria amide to validamycin is 1:4-4:1, and the total content of the active components is 10%-60%. The fungicide composition provided by the invention is specially utilized to prevent and control rice sheath blight disease, pyricularia grisea, rice false smut, wheat sharp eyespot, vegetable leaf spot disease, vegetable powdery mildew, pear scab, coniothyrium diplodiella, apple anthracnose, macrophoma kawatsukai, cucumber corynespora target leaf spot and strawberry fusarium wilt and the like.

The invention discloses a method for lowering sensitivity of a pyricularia grisea effect protein gene overexpression strain to pH. The method comprises the following steps: treating pyricularia grisea effect protein gene overexpression strain spores with pH5 and pH8; performing statistics to obtain spore yield, sprouting rate and appressorium forming rate. Compared with the prior art, the method has the advantages that the sensitivity of the pyricularia grisea effect protein gene overexpression strain to different pH can be easily, conveniently and accurately determined, and an important reference basis is laid for rapid comprehension of the pathogenicity of a pathogenic bacteria effect protein gene overexpression strain.

The invention discloses a bacillus siamensis BsNlG13 strain for inhibiting pyricularia grisea and promoting seed germination and application thereof. The bacillus siamensis BsNlG13 strain is preserved in Guangdong Microbial Culture Collection Center on December 25, 2020, and the preservation number of the bacillus siamensis BsNlG13 strain is GDMCC NO: 61391. The research shows that bacillus siamensis BsNlG13 strain fermentation liquor can effectively inhibit the growth of the pyricularia grisea, so that hyphae of the pyricularia grisea deform, and the normal growth of the pyricularia grisea cannot be realized; and meanwhile, the bacillus siamensis BsNlG13 strain fermentation broth has a significant promotion effect on rice seed germination. The bacillus siamensis BsNlG13 strain disclosed by the invention can be used as a good biocontrol and plant production regulation resource, is used for preventing and controlling the pyricularia grisea and promoting rice seed germination, and has a good application prospect.

The invention belongs to the technical field of screening and application of functional microorganisms, and particularly relates to bacillus subtilis CS30 and application thereof. The bacillus subtilis CS30 capable of producing lipopeptide is collected in China general microbiological culture collection center (address: 3#, Yard 1, Beichen West Road, Chaoyang District, Beijing (Institute of Microbiology, Chinese Academy of Sciences)) on October 31, 2018 with a collection number of CGMCC NO.16666. The bacillus subtilis CS30 of the invention is separated in deep sea cold spring sediment, and hasthe characteristic of restraining the growth of plant pathogenic fungi pyricularia grisea and tumor cells.