46 results about "Blast disease" patented technology

To provide a 3,4-dihalogenoisothiazole derivative or a salt thereof which is not harmful to a crop and has a high controlling effect on an agricultural or horticultural plant disease such as rice blast disease, cucumber anthracnose, wheat powdery mildew and wheat glume blotch, and to provide an agent for controlling an agricultural or horticultural plant disease comprising the derivative or the salt thereof as an active ingredient. A 3,4-dihalogenoisothiazole derivative represented by the general formula [I] or a salt thereof. [I] wherein X and X independently represent a halogen atom; A represents an oxygen atom or a sulfur atom; and R represents a C1-C6 alkyl group, a C2-C5 alkenyl group, a C2-C5 alkynyl group, a C3-C6 cycloalkyl group, a phenyl group, or a 5- to 10-membered heterocyclic group containing at least one member selected from an oxygen atom, a sulfur atom and a nitrogen atom.

The invention discloses a primer set, a kit and a method for detecting the pathogenic variation of the rice blast fungus avirulence gene AvrPi9. SNP changes in the avirulent gene AvrPi9 of Magnaporthe grisea lead to premature termination of the coding of the AvrPi9 gene and transformation into a virulent gene. The primer set includes two pairs of primers, the first pair of primers is used to amplify the AvrPi9 gene fragment; the second pair of primers is used to identify whether there is a SNP that causes AvrPi9 to transform into a toxic gene after mutation. The invention provides two pairs of molecular markers of the avirulent gene AvrPi9 of Magnaporthe grisea. The molecular markers can be used to quickly establish a molecular detection system for the pathogenic variation of AvrPi9 in the natural population of Magnaporthe grisea. The distribution and dynamic changes in the population are used to guide rice blast resistance breeding in various regions and the rational distribution and rotation of varieties, so as to improve breeding efficiency and control the occurrence of rice blast more effectively, so as to design rice blast comprehensive new strategies for prevention.

Disclosed are a prothioconazole and fluopicolide containing sterilization composition and uses thereof. The sterilization composition uses prothioconazole and fluopicolide as main active components. The sterilization composition can be used for preventing and curing diseases of cereal, fruit trees and vegetables, has a relatively high synergistic effect, overcomes and delays drug resistance of pathogens, has a fast sterilization speed and a long persistent period, reduces the application cost, and has an obviously more excellent prevention and cure effect than the prevention and cure effect when prothioconazole and fluopicolide are separately used. The present invention can be used for preventing and curing fungal diseases on crops, especially a powdery mildew disease, a sheath blight disease, a wilt disease, a leaf spot disease, a rust disease, a rhizoctonia disease, a net blotch disease, a leaf blotch disease, a gray mold disease, a black spot disease, a brown spot disease, a black shank disease, a rice blast disease and a phytophthora disease, and has a better effect than the effect when prothioconazole and fluopicolide are separately used.

The invention belongs to the field of the agricultural pesticides and fungicides, in particular discloses a replaced aryl ether compounds and the preparation and application. The replaced aryl ether compounds of the invention are shown as the general formula (I), wherein Ar represents Ar-1 or Ar-2. The general formula (I) compounds of the invention have the broad-spectrum activity--the compounds have very favorable control effects on the diseases such as the grape downy mildew, rice sheath blight, rice-blast disease, tomato late blight, powdery mildew, cucumber powdery mildew, cucumber downy mildew, cucumber gray mold, etc. The compounds of the invention simultaneously have very good insecticidal activity, have effects on a plurality of pests such as the armyworm, the diamondback moth, etc. and are very suitable for the integrated control of the pests on various crops.

The invention relates to a method for selecting and breeding an indica rice restorer line with strong blast resistance and belongs to the technical field of crop genetics and breeding. The method involves using an indica restorer line parent (Huazhan) that is resistant to blast disease, has excellent comprehensive agronomic traits, strong advantages, and good combining ability as the donor parent of the rice blast resistance gene, and has no resistance to rice blast, excellent comprehensive agronomic traits, and superiority. Parent 2 (Fuhui 838), an indica restorer line with strong and good combining ability, was used as the recipient parent, crossed, and then parent 1 (Huazhan) was used as the recurrent parent for backcrossing once. Molecular markers were used to detect the Rice blast resistance genes such as Pi2, Pi54, Pid3, Pita and Pib, combined with agronomic trait selection and rice blast resistance identification results, bred a new restorer line with strong blast resistance, and then matched with different sterile lines, selected Breed high-quality and high-yield hybrid indica rice combinations that are resistant to rice blast, improve the rice blast resistance of the first generation of hybrids, and make them meet the needs of current rice production.

The invention discloses a Streptomyces griseus strain XZJ.SP12 which has strong antagonistic effect to pathogenic germs of rice sheath disease and rice blast disease by means of a method of inoculating points on a plate for prescreening. The strain is preserved in China Center for Type Culture Collection in Oct, 27th, 2009, with a preserving number of CCTCC No: M209236. The strain XZJ.SP12 has resistance to pathogenic germs of rice sheath disease and rice blast disease; seeondav metabolltes of the strain XZJ.SP12 can significantly inhibit growth of pathogenic germs of rice sheath disease and rice blast disease on the culture medium; in an infection test of rice sheath disease in fields, a control group has 67.8% infection index, however, the rice coated with the fermentation liquid of the strain has only 24.1% infection index, thereby showing that seeondav metabolltes of the strain XZJ.SP12 has a good resistance to the rice sheath disease and possesses an important intrinsic value to prevent rice diseases.

The invention provides a method for creating germplasm of low chalkiness and high blast resistance fragrant soft rice, comprising the following steps: using a high blast resistance fragrant soft rice line as the female parent, and using a high-quality long-grain fragrant japonica rice line as the parent Ben, hybridized to get F 1 seed; cultivate F 1 Seeds to obtain self-bred generation population F 2 seed; cultivate F 2 Seed, in F 2 Pigm, Wx-mq and GL7 gene homozygous and / or heterozygous lines were screened out from the lines, and the lines with long grain and good agronomic traits were harvested, and the seeds F of all lines were harvested. 3 ; breed F 3 Seed, in F 3 Among the strains, the pigm, Wx‑mq and GL7 genes are all homozygous, and the strains with long grains and good agronomic traits are screened out. The strains continue to be selfed for multiple generations and combined with rice blast resistance identification, and finally obtain low chalkiness. Baigao fragrant soft rice line resistant to blast. The invention adopts step-by-step molecular screening to realize high-efficiency transfer of genes with excellent appearance quality, thereby creating a new line of fragrant soft rice with low chalkiness and high blast resistance.