254 results about "Oomycete" patented technology

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 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.

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 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 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 control of fungal and oomycete plant pathogens by inhibiting one or more biological functions. The invention provides methods and compositions for such control. By feeding one or more recombinant double stranded RNA molecules provided by the invention to the pathogen, a reduction in disease may be obtained through suppression of gene expression. The invention is also directed to methods for making transgenic plants that express the double stranded RNA molecules, and to particular combinations of transgenic agents for use in protecting plants from pathogen infection.

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.