255 results about "Oomycete" patented technology

The present invention relates to a plant, which is resistant to a pathogen of viral, bacterial, fungal or oomycete origin, wherein the plant has an increased homoserine level as compared to a plant that is not resistant to the said pathogen, in particular organisms of the phylum Oomycota. The invention further relates to a method for obtaining a plant, which is resistant to a pathogen of viral, bacterial, fungal or oomycete origin, comprising increasing the endogenous homoserine level in the plant.

A combination of plant essential oils in an aqueous solution containing vinegar provided a pesticidal effect against a range of pests, including fungi, bacteria, oomycetes, insects such as mosquitoes and bedbugs, and nematodes, and uses thereof.

The present invention discloses synergistic germicide composition with active components including captan and at least one kind of triazole germicide compound. Of the germicide composition, captan and triazole germicide compound have the weight ratio of 1 / 40 to 40 and account for 1-90 wt%. The composition has proper amount of functional assistants and carrier added for being prepared into suspension, wettable powder, water dispersed granule, microemulsion, etc. The composition may be used for preventing and treating diseases caused by oomycetes, ascomycete, basidiomycete and other germs.

The present invention relates to a plant, which is resistant to a pathogen of viral, bacterial, fungal or oomycete origin, wherein the plant has an increased homoserine level as compared to a plant that is not resistant to the said pathogen, in particular organisms of the phylum Oomycota. The invention further relates to a method for obtaining a plant, which is resistant to a pathogen of viral, bacterial, fungal or oomycete origin, comprising increasing the endogenous homoserine level in the plant.

The invention consists in modifying the levels of accumulation and emission of monoterpenes and sesquiterpenes in citrus as a mechanism to achieve systemic resistance against pathogens or repellency against pests. The alteration of the content of d-limonene and other terpenes is achieved by genetic transformation via the introduction of a gene that encodes an enzyme with d-limonene synthase activity, from a citrus fruit or plant or from another living organism, in antisense or RNAi (RNA interference) configuration. Genetic modification is achieved either by Agrobacterium tumefaciens or any other method of genetic transformation of plants from protoplasts or explants. The construction is incorporated in citrus genotypes or related genera of the family Rutaceae in order to reduce the levels of accumulation and emission of the monoterpene and precursor compounds and / or derivatives, either of leaves or flowers and / or fruit.

Methods for reducing pests (e.g., nematodes, oomycetes, fungi, viruses) in an object or area by applying to the object or area a pest reducing effective amount of a composition containing hydrogen peroxide, orange terpene oil, orange valencia oil, at least one non-ionic emulsifier, distilled water or deionized water, and optionally hydrogen peroxide. Methods for treating gastrointestinal nematode infection in ruminant animals by administering to a ruminant animal in need of such treatment a therapeutically effective amount of a composition containing orange terpene oil, orange valencia oil, at least one non-ionic emulsifier, distilled water or deionized water, and optionally hydrogen peroxide.

The invention relates to a bactericidal composition, the active ingredients are cyazofamid (A) and one of metalaxyl, metalaxyl-M, oxadixyl, benalaxyl, furalaxyl, cymoxanil or propamocarb (B), and the weight ratio of A to B is 50:1-1:50. The complex of A and B realizes the obvious synergistic effect, and the bactericidal composition is used for the disease control of the crops of fruit trees, flowers, cotton, wheat, rice, rapeseed, vegetables and the like, especially the diseases of oomycetes.

The invention discloses effector protein Avh87 derived from phytophthora cinnamomi, and a coding gene and application thereof. The protein has the amino acid sequence of SEQ ID No. 1 in the sequence table. The nucleotide sequence expressing the protein is represented by SEQ ID No. 2 in the sequence table. Experiments show that the gene can inhibit plant cell hypersensitive reactions induced by apoptotic precursor protein Bax, or inhibit plant cell death induced by pathogenic phytophthora elicitors INF1. The effector protein Avh87 is of great significance in enriching molecular mechanism information of the interaction between the phytopathogenic oomycetes and hosts, and in establishing a comprehensive prevention and control technology strategy for phytopathogenic oomycete diseases.

The invention relates to an antagonist bacterium which can overcome or eliminate a hot pepper epidemic disease and produced microbial organic fertilizer thereof, belonging to an intensive agriculture production technology. By the invention, an antagonist bacterium (Bacillus pumilus NJLZ-8) which has an obvious antagonist function on pathogenic oomycetes of the hot pepper continuous cropping epidemic disease is separated; the antagonist bacterium is mixed with organic fertilizer to prepare microbial organic fertilizer; and the fertilizer contains more than 1*108 antagonist microorganisms per gram, 4-5 percent of total nitrogen ( more than 90 percent of organic nitrogen), 6-10 percent of total nitrogen-phosphorus-potassium nutrients and 30-35 percent of organic matter. Proved by tests, the microbial organic fertilizer can rapidly breed antagonist bacteria after being applied into soil, form a preponderant group in the soil and has more than 80 percent of biological preventing and treating rate on the hot pepper epidemic disease in the soil with serious hot pepper epidemic disease. The generation of the hot pepper epidemic disease can be prevented to a large extent by applying the microbial organic fertilizer on the soil without forming continuous cropping obstacles for a long time.

This present disclosure is related to the field of 1-(substituted-benzoyl)-5-fluoro-4-imino-3-methyl-3,4-dihydropyrimidin-2(1H)-ones and their derivatives and to the use of these compounds as fungicides. Fungicides are compounds, of natural or synthetic origin, which act to protect and / or cure plants against damage caused by agriculturally relevant fungi. Generally, no single fungicide is useful in all situations. Consequently, research is ongoing to produce fungicides that may have better performance, are easier to use, and cost less. The present disclosure relates to 1-(substituted-benzoyl)-5-fluoro-4-imino-3-methyl-3,4-dihydropyrimidin-2(1H)-one compounds and their use as fungicides. The compounds of the present disclosure may offer protection against fungi and fungi like organisms including ascomycetes, basidiomycetes, deuteromycetes, and oomycetes.

The invention discloses a paenibacillus polymyxa strain and application thereof. The strain belongs to paenibacillus polymyxa strains YT9, and the preservation number of the strain is CGMCC NO.15958.The separated strain not only has a strong inhibition effect on phytophthora sojae but also has a great antagonism effect on plant pathogenic oomycetes and phytopathogenic fungi, wherein the plant pathogenic oomycetes include phytophthora capsici, phytophthora nicotianae and the like, and phytopathogenic fungi include wheat sheath blight bacteria, wheat root rot bacteria, cercospora personata, cercospora arachidicola and the like; the bacteriostatic effect on phytophthora sojae is the strongest, wherein the bacteriostatic rate reaches 86.27%+ / -1.62%. In addition, the paenibacillus polymyxa strain YT9 is separated from healthy soybean rhizosphere soil and is free of ecological toxicity, high in safety, wide in bacteriostatic spectrum, stable and lasting in bacteriostatic activity and easy to culture. The strain has a broad application prospect in biological control over plant diseases.

The invention relates to a pesticide, and especially relates to a complex bactericide composed of bacillus subtilis and a chemical bactericide. The bactericide is used for controlling brassica rapa pekinensis downy mildew. The bactericide comprises the chemical bactericide, bacillus subtilis XM16 CGMCC No.0372, and auxiliary materials. The bactericide is characterized in that the chemical bactericide in the active components is any one selected from metalaxyl, propamocarb, and mancozeb. A biocontrol bacterium is bacillus subtilis XM16, with the strain collection number of CGMCC No.0372. A weight ratio of metalaxyl to bacillus subtilis XM16 is 1-8:1-10. A weight ratio of propamocarb to bacillus subtilis XM16 is 1-10:15-140. A weight ratio of mancozeb to bacillus subtilis XM16 is 1-15:1-10. A form of the bactericide is usually hydrophilic powder or aqueous solution. The complex agent of the biocontrol bacterium and the chemical bactericide has a substantial synergetic effect in controlling brassica rapa pekinensis downy mildew. The biocontrol bacterium bacillus subtilis XM16 is advantaged in high bacteriostatic activity, high stress resistance, and wide bactericidal spectrum. The biocontrol bacterium is complexed with the oomycetes chemical bactericide, such that the pesticide dosage is reduced, and controlling effect is improved. The bactericide is an environment-friendly bactericide. The bactericide is advantaged in high biological safety, low cost, and substantial economic benefit.

The invention discloses bacillus velezensis and application thereof. The strain is preserved China General Microbiological Culture Collection Center of China Committee for Culture Collection of Microorganisms on 07 December, 2020, has a preservation number of CGMCC No. 21318 and has a preservation number of Bacillus velezensis TYGF10-2F9. By applying the strain to the field of agricultural biocontrol, a biomembrane can be formed and is stably colonized at rhizosphere of plants, can generate a relatively high and broad-spectrum inhibiting action on 12 kinds of plant pathogenic fungi and oomycetes, and substances such as IAA and siderophore can be generated to promote plant growth. Fermentation liquor of the bacillus velezensis has the prevention efficiency of 80.99% to sclerotinia rot of rape pot culture; and a suspension or fermentation liquor of the bacillus velezensis has the prevention efficiency of 66.67% to cucumber wither pot culture, the strain plays a certain role in promoting growth of cucumbers, is a biological control strain with excellent performance and has a good development application prospect.

The invention discloses a compound synergistic bactericidal composition, the effective ingredients of which are zoxamide (A) and (B) which is one active ingredients of cyazofamid, cymoxanil, propamocarb and thiram, wherein the mass ratio of the effective ingredients A to B is 50:1-1:50. The effective ingredients A and B have obvious synergized action after being compounded in a certain proportionrange, and are mainly used for preventing and treating oomycete diseases.

The invention discloses streptomyces hygroscopicus capable of producing salicylic acid and rapamycin and application of the streptomyces hygroscopicus to prevention and control of plant oomycetes andfungal diseases. The invention also discloses the streptomyces hygroscopicus capable of producing the salicylic acid and the rapamycin, which has the preservation number of CGMCC (China General Microbiological Culture Collection Center) No. 15518, and the application of the streptomyces hygroscopicus to the prevention and control of the plant oomycetes and fungal diseases. The invention identifiesa biocontrol bacterium aiming at the plant oomycetes and fungal diseases, especially phytophthora infestans and fusarium oxysporum; the bacterium can be used for remarkably inhibiting spore germination and mycelium growth of the phytophthora infestans; an effective method is provided for biologically preventing and controlling the plant oomycetes and fungal diseases, especially the phytophthora infestans and fusarium wilt. The method disclosed by the invention can be used for effectively preventing and controlling the phytophthora infestans, the fusarium wilt and other plant diseases and reducing the economic loss; the method has important meaning of reducing the utilization of pesticide and alleviating environment pollution, and also has significant application value of keeping the balance and sustainable development of an ecological system.

The invention discloses new applications of melatonin in inhibition of plant oomycetes diseases, and also discloses a bactericide containing melatonin. The invention discloses for the first time that the melatonin can effectively prevent plant oomycetes diseases, thus providing a new concept for the prevention of oomycetes diseases; melatonin plus fluopicolide or melatonin plus ethylicin combination plays a synergistic effect, the combination use can greatly enhance the pesticide effect, reduce the usage amount of pesticide, and is beneficial to green control and to realize the sustainable development of agricultural ecological civilization.

The invention provides a flavonoid with agricultural bacteriostatic activity and belongs to the technical field of pesticides. The compound has the following structural formula. The International Union of Pure and Applied Chemistry (IUPAC) chemical name of the compound is E-3-(3-(3,7-dimethyl-2,6-dialkylene)-4-hydroxyphenyl)-5,7-dihydroxyl-4H-benzopyran-4-ketone. The compound has high inhabitation effect on oomycetes selectively and can be processed into a pesticide preparation for preventing and controlling oomycete diseases.

The invention discloses an effector protein derived from phytophthora capsici as well as a coding gene and application thereof. The protein disclosed by the invention is (a) or (b) or (c): (a) protein consisting of amino acid sequences represented in the 19th-476th sites of a sequence 1 of a sequence list; (b) protein consisting of an amino acid sequence represented in the sequence 1 of the sequence list; and (c) protein obtained by substituting and / or deleting and / or adding the amino acid sequence of the protein defined by (a) or (b) through one or more amino acid residues and having an effector function. Experiments prove that the protein disclosed by the invention effectively participates in a process that phytophthora capsici infects a pepper host and has a function of inducing plant tissue cell death and even an obvious necrotic symptom on an infected part. The effector protein disclosed by the invention is significant for enriching molecular mechanism information of plant pathogenic oomycetes and host interaction and for establishing an oomycetes disease integrated control technological strategy.

The invention relates to a bactericidal composition with active ingredients to be pyrazole-kresoxim-methyl and thiram, and belongs to the bactericidal composition pesticide technology field. The bactericidal composition contains the active ingredients to be the pyrazole-kresoxim-methyl and the thiram, the weight ratio of which are 1:40-40:1 and the weight percentages are 1%-90%; and the bactericidal composition can be prepared into wettable powder, water dispersible granules, a suspending agent, aqueous emulsion, micro-emulsion, or other formulations. The bactericidal composition at least contains a carrier and an accessory ingredient, wherein at least one is a surface active agent which can be an emulsifier, a dispersant, a humectant or a penetrant. The carrier can be water, organic solvent or latent solvent, and filling material according to the different preparation formulations. A stabilizing agent, a thickening agent, a defoaming agent, a cementing agent and other functional accessory ingredients can be added when necessary. The bactericidal composition can be used for preventing and curing a plurality of plant diseases caused by oomycetes, ascomycetes, basidiomycetes, deuteromycetes, and so on, so as to play an important role in enhancing effects, curing diseases, reducing cost, delaying pesticide resistance, etc.

The present invention relates to dsRNA molecules for inhibiting the expression of CYP51 gene(s) from a fungal or oomycete phytopathogen and the use of such inhibitory dsRNA molecules for controlling phytopathogenic fungi and / or oomycetes. The present invention further relates to DNA sequences providing a transcriptional template for inhibitory dsRNA molecules or antisense RNA; and phytopathogen-tolerant transgenic plants with such DNA sequences.

The invention relates to a bactericidal composition, the active ingredients are cyazofamid (A) and a protective fungicide (B), the weight ratio of A to B is 30:1-1:80; and the protective fungicide B which can be used for the composition comprises chlorothalonil, thiram, ziram, mancozeb, zineb, propineb, amobam and metiram. The composition has obvious synergistic effect and can be used for the disease control of the crops of fruit trees, flowers, cotton, wheat, rice, rapeseed, vegetables and the like, especially the diseases of oomycetes.

The present invention relates to a plant, which is resistant to a pathogen of viral, bacterial, fungal or oomycete origin, wherein the plant has a reduced level, reduced activity or complete absence of DMR6 protein as compared to a plant that is not resistant to the said pathogen, in particular organisms of the Fungi or the phylum Oomycota. The invention further relates to a method for obtaining a plant, which is resistant to a pathogen of viral, bacterial, fungal or oomycete origin, comprising reducing the endogenous level or activity of DMR6 protein in the plant. In addition, the invention relates to the use of a DMR6 promotor for providing disease resistant plants.

A disinfactant 'Wanlongmycin', C53H67N13O13S2 molecular weight 1157 is disclosed, which can be used to prevent the eliminate the bacterial and oomycetes' disease, such as rice streak disease, hoja blanca, frosty mildew, etc.

The invention relates to a pesticide, in particular to a compound bactericide for preventing and treating vegetable oomycetes diseases and a preparation thereof. The compound bactericide for preventing and treating the vegetable oomycetes diseases contains active ingredients, packing and / or auxiliaries, wherein the active ingredients contain carboxylic acid amide bactericide and methoxyl crylic acid ester bactericide with the weight proportion of 1 to 100:1 to 100. The preparation of the compound bactericide comprises wettable powder and water dispersed granule. The compound bactericide for preventing and treating the vegetable oomycetes diseases and the preparation thereof simultaneously have the advantages of good quick action property and effect lasting property, multiple action points of drugs, wide disease prevention spectrum and high biological safety, and can effectively delay the occurrence and the growth of the drug resistance of oomycetes. The compound preparation has the advantages of simple preparation process, low cost and obvious economic benefit.

The subject invention provides materials and methods for the control of pests, including fungi, oomycetes, nematodes, and weeds, of numerous crops, plants and forests. Advantageously, pests in the soil can be controlled without phytotoxicity. In certain embodiments, the subject invention provides new pesticidal compositions. In preferred embodiments, these compositions comprise an active ingredient component that is formic acid and / or acetic acid, and / or salts thereof. The composition further comprises a second acidic component that enhances the pesticidal activity of the first active ingredient component.

The invention relates to a notoginseng soil treatment agent and a use method thereof. The notoginseng soil treatment agent contains 50% of carbendazol wettable powder, 95% of hymexazol wettable powder, 25% of metalaxyl, propamocarb wettable powder and 72% of agricultural use streptomycin wettable powder. The soil treatment agent has good effects to prevent major fungus diseases caused by ascomycetes, deuteromycetes, oomycetes in fungus and diseases caused by pseudomonas and xanthomonas bacteria; soil treatment is carried out on soil which is used for continuously planting for four years with the soil treatment agent 20 days before notoginseng transplanting and a notoginseng seed dressing. Rate of emergence of a field trial is 87.22% which is 63.63% higher than that of a comparison without using the soil treatment agent of 23.59 percent. The soil treatment agent has low toxicity to human and livestock and less vestigital, and not only can be used for preventing and treating bad rot, stump rot, bud-rot and diseases of the notoginseng, but also can be used for treating the soil of various crops of other traditional Chinese medical materials and vegetables.

The invention relates to a bactericidal composition containing cyazofamid, which comprises a decomposition-resisting factor and a component C, wherein a mass ratio of a component A, namely the cyazofamid to the decomposition-resisting factor to the component C is (3-50):(0.1-5):(3-60). The bactericidal composition is compounded by multiple active components, a matching ratio of the active components is adjusted, and a stabilizing agent is added, so that the compounded bactericidal composition has a more excellent control effect on an oomycetes disease; action mechanisms of the active components in the bactericidal composition are different, so that pesticide toxicity resistance generation can be avoided, and a generation speed of disease pesticide resistance can be postponed; the bactericidal composition can prevent and expand a bactericidal spectrum, can greatly reduce the pesticide consumption and the use cost, is safer to crops, and can reduce environmental pollution.

The invention relates to pesticides, in particular to composite bactericide for controlling fruit and vegetable oomycetes diseases. The composite bactericide consists of active elements, fillers and / or auxiliary agents, which is characterized in that the active elements consist of carboxylic acid amide bactericides and metiram, the weight ratio of the carboxylic acid amide bactericides to the metiram is (1-10):(10-100). The product form of the composite bactericide for controlling the fruit and vegetable oomycetes disease can be wettable powder or water dispersible granules. The composite bactericide for controlling the fruit and vegetable oomycetes diseases is suitable for controlling various oomycetes diseases of the fruits and vegetables, in particular controlling the potato late blight, the cucumber downy mildew, the grape downy mildew, the tomato late blight, the capsicum blight and the Chinese cabbage downy mildew; the composite bactericide has remarkable synergism and more action mechanisms and sites, and can effectively delay the generation and spread of oomycetes pesticide resistance; in addition, the invention has the advantages of wide disease controlling spectrum, high biologic safety, simple preparation method, low cost and remarkable economic benefit.