14 results about "Blast disease" patented technology

The invention belongs to the technical field of prevention and treatment of rice blast, and particularly relates to a polypeptide MP1 for inhibiting rice blast bacteria and application thereof. The invention discloses a polypeptide MP1 for inhibiting magnaporthe oryzae. The amino acid sequence of the polypeptide MP1 is as shown in SEQ ID NO. 1. The polypeptide MP1 has an obvious inhibition effect on the magnaporthe oryzae appressorium, and the EC50 formed by the MP1 polypeptide on the appressorium is 134.60 mu M. Experiments show that the polypeptide can effectively interfere the normal differentiation and development of the appressorium in the key pathogenic stage of magnaporthe oryzae, so that the polypeptide has a strong prevention and control potential in the early stage of pathogenic bacterium infection. The polypeptide MP1 provided by the invention can significantly reduce the pathogenicity of magnaporthe oryzae to barley and rice, and provides an experimental basis for developing a novel biopesticide for preventing and treating the magnaporthe oryzae.

The present application relates to the field of rice blast prevention, and particularly relates to an application of perphenazine in prevention and treatment of rice blast. At present, perphenazine has not been reported in literatures to be used for prevention and treatment of rice blast. The technical problem to be solved by the present application is to provide an application of perphenazine in prevention and treatment of rice blast. The present application proves the effect of perphenazine in inhibiting rice blast fungus through tests. With the increase of concentration, the vegetative growth of rice blast fungus is obviously inhibited. Under the interference of perphenazine at a certain concentration, the pathogenicity of rice blast fungus is almost completely lost. Therefore, perphenazine can be used as a new antifungal agent for prevention and treatment of rice blast.

The invention relates to the field of crop breeding, in particular to a rice blast detection and counting method, which adopts the technical scheme that by improving a YOLOv8 detection algorithm and introducing a C2f-Aster module, a BFPN module, a WAdapt-IoU loss function and an LSCSAD detection head, the model performance is optimized, the parameter quantity and the calculation complexity are reduced, the characteristic expression ability to rice blast scabs and diseased leaves is enhanced, and the rice blast detection accuracy is improved. The method is suitable for resource-limited rice blast detection scenes, the detection capability of the model on rice blast disease spots and diseased leaves is improved, the generalization capability of the rice blast detection model is enhanced, the rice blast disease spot boundary detection precision is enhanced, the positioning precision of the disease spots and the diseased leaves is improved, and efficient and accurate rice blast detection and counting are achieved. And the accuracy and efficiency of rice blast disease detection and counting are improved.

The invention relates to the technical field of soil improvement and crop disease prevention and control. The invention provides a zinc-silicon synergistic soil conditioner and a preparation method and application thereof.The zinc-silicon synergistic soil conditioner is prepared from, by mass, 5-8 parts of citric acid chelated zinc, 5-8 parts of citric acid chelated zinc, 5-8 parts of citric acid chelated zinc, 5-8 parts of citric acid chelated zinc, 5-8 parts of citric acid chelated zinc, 5- 25 to 40 parts of potassium silicate; 30 to 45 parts of humic acid; 5 to 10 parts of soluble starch; and the balance of deionized water. According to the zinc-silicon synergistic soil conditioner, the pH and the alkalization degree of soda saline-alkali soil are reduced through humic acid, and the rhizosphere microenvironment is improved; the citric acid chelated zinc provides quick-acting zinc, the potassium silicate continuously releases silicon, and the citric acid chelated zinc and the potassium silicate keep high bioavailability under the protection of humic acid; the soluble starch regulates nutrient release and prevents precipitation and inactivation. Field application shows that the morbidity of the rice red blight in the soda saline-alkali soil can be reduced to 5% or below, and synergistic interaction of soil improvement and disease prevention and control is achieved.

This invention provides the application of FSD2 in regulating resistance to rice sheath blight and bacterial leaf blight, belonging to the field of gene breeding technology. This invention provides... FSD2 The application of genes and / or encoded proteins in regulating resistance in rice to infectious diseases caused by pathogenic microorganisms, the aforementioned FSD2 Genes are involved in regulating rice resistance to sheath blight and bacterial leaf blight. This invention obtains these genes through genetic transformation. FSD2 Overexpressing plants, compared with wild-type plants, showed that overexpressing plants... FSD2 The gene expression level was significantly higher than that of the wild type; after inoculation with *Rhizoctonia solani* and *Bacterium oxysporum*, the overexpressing plants showed significantly enhanced resistance to *Rhizoctonia solani* and *Bacterium oxysporum*. This invention provides a theoretical basis for elucidating the disease-resistant properties of plants, and can also be applied to the screening and creation of disease-resistant rice materials, laying a germplasm foundation for future variety improvement.

The application belongs to the technical field of plant disease prevention and treatment, and provides application of tetrahydro-gamma-carboline derivative. The structural formula of the tetrahydro-gamma-carboline derivative is: The derivative has a good inhibitory effect on fungal diseases of rice and tobacco, and can be used for preparing pesticides for preventing and treating tobacco target spot disease, tobacco brown spot disease, rice sheath blight disease and rice blast disease, and the application provides a new parent structure for development of the pesticides. The two kinds of tetrahydro-gamma-carboline derivatives provided by the application can be compounded with various types of pesticides, have a good synergistic effect on the above plant diseases, and can be used for delaying resistance development of existing commercial pesticides and prolonging the life cycle.

The invention provides a rice blast condition dynamic monitoring method based on a novel vegetation index and an unmanned aerial vehicle time sequence multispectral image. The method comprises the following steps: obtaining canopy spectrum and condition data of health and different condition severity susceptible samples in a plurality of phenological stages; constructing a multispectral rice blast vegetation index based on the canopy spectrum and the disease index, and constructing a disease index estimation model based on the multispectral rice blast vegetation index; and drawing a multi-temporal disease index spatial distribution map based on the time sequence unmanned aerial vehicle multispectral image, and drawing a disease index daily growth rate spatial distribution map based on the multi-temporal disease index spatial distribution map. According to the method, the disease index estimation precision is remarkably improved by constructing the novel vegetation index, and the defect that traditional static investigation is difficult to reflect the disease development trend is overcome through the time sequence dynamic index. The novel rice blast vegetation index of the method can be suitable for most of multispectral images, the illness condition drawing and sequence analysis steps are simple, the calculation cost is low, and the method can be widely applied to illness condition investigation, accurate pesticide application and pesticide effect tracking.

This invention belongs to the field of rice blast disease control technology, specifically relating to a polypeptide MP1 that inhibits rice blast fungus and its application. This invention discloses a polypeptide MP1 that inhibits rice blast fungus, the amino acid sequence of which is shown in SEQ ID NO.1. This polypeptide MP1 has a significant inhibitory effect on rice blast fungus appressoriums; after 24 h, the MP1 polypeptide significantly inhibits the formation of ECs on appressoriums. 50 The concentration was 134.60 μM. Experiments showed that the peptide could effectively interfere with the normal differentiation and development of appressorium, a key stage in the pathogenesis of rice blast fungus, thus exerting strong control potential in the early stages of pathogen infection. The peptide MP1 provided by this invention can significantly reduce the pathogenicity of rice blast fungus to barley and rice, providing experimental evidence for the development of novel biological pesticides for the control of rice blast.

The invention discloses a rice seedling blast disease intelligent analysis system based on remote sensing data analysis, and relates to the technical field of agricultural remote sensing and plant disease monitoring, the system comprises a physiological data acquisition module, a physiological feature extraction module and a disease severity calculation and severity grading module; wherein the physiological data acquisition module realizes in-situ non-invasive acquisition of the spectral reflectivity of rice seedling leaves, the maximum photochemical efficiency of a light system II and the water transport rate of stalks through various sensors such as a hyperspectral sensor and a chlorophyll luminoscope; the physiological feature extraction module fuses multiple parameters to calculate a leaf surface structure health index and a vascular function activity index; the disease grading module obtains an in-vivo disease load index through weighting, and outputs different disease grades in combination with a K-means clustering threshold value; the system solves the problems that traditional rice seedling blast diagnosis is high in subjectivity and hysteresis quality, and early-stage accurate recognition of diseases is achieved.

The present application relates to the technical field of agricultural disease detection and crop disease resistance screening, and in particular to a rice bacterial leaf blight disease resistance screening method based on a UAV and deep learning, which has the technical scheme of: an optimized YOLOv11-OBB model is composed of a C3k2FC module, an SPPF_LSKA module, a SlimNeck module and a LiteHead module, is responsible for extracting features in an image and locating bacterial leaf blight spots, and can efficiently and accurately detect bacterial leaf blight spots; a lightweight deep learning model is used, can efficiently run on a resource-limited UAV platform, and reduces device and computing costs; through cooperation of multiple optimization modules, the detection accuracy of bacterial leaf blight spots is significantly improved, and stable detection effects can be maintained; the operation process is simplified, and full automation of bacterial leaf blight disease resistance screening is realized; therefore, by using the lightweight and optimized YOLOv11-OBB model and combining the module design with high computing efficiency, low-cost, efficient, automated and high-precision bacterial leaf blight disease resistance screening is realized, and the method is suitable for large-scale field application.

This invention relates to the field of pesticide technology, specifically to a soluble concentrate containing kasugamycin and its preparation process. By mass percentage, the raw materials for preparation include at least 0.1-8% kasugamycin, 0.1-30% plant growth regulators, 1-8% surfactants, 0.1-2% pH adjusters, 5-40% stabilizers, and deionized water to make up the balance. Specifically, this invention uses a combination of orthosilicic acid and kasugamycin. By controlling the amount of orthosilicic acid added to the soluble concentrate to 1-3 wt%, the mass ratio of kasugamycin to orthosilicic acid is (2-4):(1-3). This ensures product stability while achieving effective control of rice blast disease, exhibiting control effects no less than conventional agents such as tricyclazole and isoprothiolane, and with relatively lower pesticide residues compared to these agents, effectively improving rice quality and ensuring the safety of agricultural products.

The invention provides a molecular identification chip aiming at permanent resistance of rice blast and application thereof, the chip comprises 600-800 specific nucleic acid probes fixed on a solid phase carrier, each probe corresponds to a functional genetic locus subjected to multi-year, multi-point and multi-race inoculation tests and whole genome association analysis verification, and the molecular identification chip is used for identifying the permanent resistance of the rice blast. According to the method, a comprehensive resistance index (CRI) prediction model is constructed by combining high-throughput typing with machine learning. During breeding, the lasting resistance level of the material to multiple rice blast can be rapidly quantified in the seedling stage, and early-stage accurate screening is achieved. Compared with a traditional method depending on a single major R gene, the method has the advantages that the resistance broad spectrum and durability are remarkably improved, the field identification cost is reduced by 70% or above, and pesticide application reduction and green production are supported. The technology provides an efficient, intelligent and sustainable molecular tool for rice disease-resistant breeding.

The application discloses application of a compound BTD-81 in preparation of a medicine for preventing and treating Pyricularia oryzae, and belongs to the field of plant fungal disease prevention and treatment. The compound BTD-81 has a remarkable effect in preventing and treating rice blast or / and other pathogenic fungi, can effectively inhibit spore pathogenicity of the Pyricularia oryzae in a concentration range of 10-50 ppm, and especially, the compound BTD-81 at 50 ppm can completely prevent and treat the rice blast. The compound BTD-81 can be used as a protective agent, has a better effect when used at an initial stage of the rice blast infection, and under the condition of spraying the compound, the growth state of the rice is good, and there is no obvious adverse effect, indicating that the compound is safe to the rice, and has a practical significance for preventing the rice blast disease.

The application relates to the technical field of pesticides for rice, and aims to solve the problem of ecological environment damage caused by existing chemical pesticides, and provides application of Chymostatin in prevention and control of rice blast, including: S1, inhibiting rice Magnaporthe oryzae; S2, preventing and controlling rice blast; the CAS No of the Chymostatin is 9076-44-2. Chymostatin has a strong inhibiting effect on rice Magnaporthe oryzae, has low harm degree on animals such as human and livestock, is easy to degrade, is friendly to the environment, is beneficial to ecological balance and stability. Chymostatin can significantly inhibit the formation of Magnaporthe oryzae appressorium, and then inhibit the infection. Chymostatin has good inhibiting activity on various rice Magnaporthe oryzae and has broad spectrum.