38 results about "Blumeria graminis" patented technology

The invention discloses a substituent ether compound which is structurally shown as a general formula (I): the definition of each substituent group refers to an instruction manual. The compound has the broad-spectrum insecticidal activity, is very effective to lepidoptera pests including European corn borers, sugarcane borers, summer fruit tortrix moths, apple budworms, tussock moths, rice leaf rollers, corn borers, tobacco leaf worms, small budworms, cabbage moths, lesser corn worms, cotton leaf worms and the like, particularly has better activity to the cabbage moths and the lesser corn worms and can obtain good effect under the low dosage. The substituent ether compound also has high activity to homoptera pests like aphids and the like. Meanwhile, a part of compound also has good bactericidal activity and can be used for preventing and treating blumeria graminis, cucumber downy mildew, vegetable gray mold and the like.

The invention belongs to the technical field of pesticide, and particularly relates to a preparation method and application of a pesticide preparation containing pyraclostrobin and tebuconazole. The method comprises the following steps: step 1, adding a polylactic acid-glycolic acid copolymer into a mixed solution of N,N'-dicyclohexylcarbodiimide, 4-dimethylaminopyridine and tetrahydrofuran; step2, dissolving polyvinyl alcohol in water, adding the tebuconazole and mixing uniformly; in an ultrasonic condition, dropwise adding a mixed solution prepared in the step 1, performing ultrasonic treatment continuously, and filtering to obtain a solid substance; step 3, dissolving cellulose in a mixed solution of tetraethylammonium hydroxide, tetraethylphosphonium hydroxide and methylbenzene, adding the pyraclostrobin and isolongifolenone, and stirring uniformly; step 4, adding the solid substance, which is prepared in the step 2, into a mixed system prepared in the step 3, performing ultrasonic treatment, and introducing nitrogen gas; and step 5, freezing, drying, and carrying out superfine grinding by using a sand mill to prepare a product; the product has an excellent control effect on fusarium graminerum and blumeria graminis.

The invention provides a single spore isolation method of Blumeria graminis, and belongs to the technical field of plant pathogenic obligate fungus parasite isolation method. The single spore isolation method comprises following steps: 1, field Blumeria graminis infected samples are collected, and indoor spore production is carried out so as to obtain samples for further processing; 2, an electrically fluorinated liquid is adopted to prepare a spore suspension liquid; 3, suspension liquid coating is carried out to prepare single spore fungus dishes; 4, the single spore fungus dishes are selected and are inverted placed on wheat detached leaf segments; 5, the inoculated leaf segments are delivered into an illumination incubator for 10 days of culturing so as to obtain pure Blumeria graminis fungus colonies. The single spore isolation method is simple and convenient, and is capable of obtaining pure cultured Blumeria graminis at a relatively high success rate via separation, and solving a problem that conventional fungus separation method is not suitable for Blumeria graminis single spore isolation.

The invention provides a 1-phenazinyl(phenyl)(5-pyrimidyl)methanol compound and a preparation method and an application thereof. A general formula of the compound is as shown in the description, wherein Ra is 5-bromopyrimidine and a substituted compound thereof (A) (a formula is as shown in the description), and R is an alkyl, an alkoxy, a cyano-group, an alkoxy, monobromopyridine and a substituted compound thereof; and Rb is a benzene ring and a substituted compound thereof (B) (a formula is as shown in the description), and R is an alkyl, an alkoxy, a halogeno-group, an aryloxy, a cyano-group, and an aryl. The preparation method for the compound comprises the following steps: using an active substructure splicing method, and introducing an ancymidol structure into an azophenylene-1-carboxylic acid structure. The application comprises a process of preparing a sterilization composition containing the compound, and the application further comprises better bactericidal activity of the compound and the sterilization composition for preventing diseases, especially pellicularia sasakii ito, watermelon fusarium wilt, alternaria solani, rice blast, sclerotinia sclerotiorum, fusarium graminearumt, blumeria graminis and the like, in crops caused by fungi.

The invention relates to an intelligent blumeria graminis spore picture identification method. The method includes the steps of selecting different expert models to enable the intelligent identification accuracy to be capable of adapting to different requirements; pre-processing blumeria graminis spore pictures; dividing the blumeria graminis spore pictures; extracting the color, texture and shape features of the blumeria graminis spore pictures; conducting intelligent identification on the extracted features of the blumeria graminis spore pictures. By means of the intelligent blumeria graminis spore picture identification method, the blumeria graminis spore density in unit volume in air for a certain time can be rapidly calculated, and the basic conditions of blumeria graminis spore diseases are obtained. By means of the intelligent blumeria graminis spore picture identification method, automatic dividing of the blumeria graminis spore pictures is achieved, and the problem that an existing manual dividing method is low in efficiency is solved; automatic identification and automatic counting of the blumeria graminis spore pictures are achieved, and the problem that an existing manual (expert) identification method is low in efficiency and prone to making mistakes is solved; the intelligent blumeria graminis spore picture identification method can be suitable for the different manual (expert) using requirements and high in adaptability.

The invention discloses a triazoline ketone ether-substituted compound which has a structure shown in a general formula I in the description. In the formula, the definition of each substitutional group is shown in the description. The compounds in the general formula I can be used for preventing and treating diseases caused by various pathogenic bacteria on various plants, such as oomycetes, basidiomycetes, ascomycetes, adelomycetes and the like; in addition, the compounds have high biological activity, so that favorable effect at lower dosage can be obtained, particularly the compounds have better effect for the activity of the diseases of blumeria graminis and the like. Therefore, the invention also discloses application of the compounds in the general formula I to the fields of agriculture and the like as bactericides.

The invention discloses the application of chelidonine for preparing a plant resist and the plant resist. In the present invention, the disease-inducing activity of chelidonine is clarified by measuring the biological activity in vitro and in vivo, and the disease-inducing activity of chelidonine is determined by measuring the changes of physiological indexes and disease-resistance-related genes in tobacco caused by chelidonine. mechanism. The preparation method of chelidonine inducer is to prepare chelidanine into soluble powder, water dispersible granule, soluble liquid, water emulsion and microemulsion through a certain processing process, which are used in tobacco, kiwi fruit, strawberry, Control of Tobacco mosaic virus (TMV), kiwifruit canker (Pseudomonas syringae PV actinidia), strawberry gray mold (Botrytis cinerea), cucumber downy mildew (Pseudoperonospora cubensis) and wheat flour (Blumeria graminis) on cucumber, wheat and other crops ) and other plant fungal, oomycete, bacterial and viral diseases. The preparation contains 0.1% to 5% of chelidrine, and the rest are auxiliary agents.