5 results about "Phomopsis sp." patented technology

The invention relates to a salt-tolerant bacillus strain EMM919, which is preserved in the China Center for Type Culture Collection on April 25, 2025, and the preservation number is CCTCC NO: M 2025879. The salt-tolerant bacillus strain EMM919 has the advantages that the salt-tolerant bacillus strain EMM919 is preserved in the China Center for Type Culture Collection on April 25, 2025; the nucleotide sequence of the strain comprises a 16S rRNA (ribosomal Ribonucleic Acid) gene sequence and a gyrB gene sequence. The bacterial strain can be used for preparing microbial pesticides and seed dressing agents for preventing and treating fusarium solani EMF893, neurospora EMF992, cylindrospora robusta EMF882, fusarium laminatum EMF998, alternaria alternata EMF993, botryosphaeria dothidea EMF899, solanum nigrum EMF990, phomopsis EMF898 and fusarium graminearum EMF897. The content of viable bacteria in the liquid pesticide is 2 * 10 < 9 >-5 * 10 < 9 > CFU / mL, and the content of viable bacteria in the solid pesticide is 2 * 10 < 9 >-8 * 10 < 9 > CFU / g. In the liquid seed-dressing agent, the content of viable bacteria is 2 * 10 < 9 >-5 * 10 < 9 > CFU / mL, and in the solid seed-dressing agent, the content of viable bacteria is 2 * 10 < 9 >-8 * 10 < 9 > CFU / g.

The invention relates to the technical field of plant protection, and particularly provides application of kaempferol in prevention and treatment of areca leaf blight. The pathogenic bacteria of the leaf spot disease of the areca seeds are Diapodophytic fungi, and the pathogenic bacteria of the leaf spot disease of the areca seeds are Diapodophytic fungi. Experiments prove that the kaempferol can significantly inhibit the mycelial growth of the pathogenic bacteria at low concentration, and can significantly reduce the pathogenicity of the areca catechu leaves and reduce the area of scabs by pretreating the areca catechu leaves. The kaempferol serving as a plant source active component has the advantages of being environmentally friendly, not prone to generating drug resistance and the like, and a new technical scheme and a candidate agent are provided for green and sustainable prevention and control of the areca leaf spot disease.

The invention discloses a pyrazole-containing chalcone derivative as well as a preparation method and application thereof, and belongs to the technical field of pesticide synthesis. A series of pyrazol-containing chalcone derivatives are synthesized by taking chalcone as a leading structure and introducing a pyrazol skeleton with excellent agricultural activity into the structure of chalcone, and plant pathogenic fungus activity inhibition tests are carried out on the synthesized pyrazol-containing chalcone derivatives, so that the activity of the pyrazol-containing chalcone derivatives is shown in the description. The synthesized pyrazole-containing chalcone derivative can effectively inhibit plant pathogenic fungi, and especially has relatively good inhibitory activity on phomopsis, phytophthora capsici and capsicum oxysporum.

This invention relates to the field of plant protection technology, specifically providing the application of kaempferol in the control of areca leaf spot disease. The pathogen causing areca leaf spot disease is *Pseudomonas stylosa*. Diaporthe pseudophoenicicola Experiments have shown that kaempferol can significantly inhibit the mycelial growth of this pathogen at low concentrations, and can significantly reduce its pathogenicity and lesion area by pretreating areca nut leaves. As a plant-derived active ingredient, kaempferol has the advantages of being environmentally friendly and not prone to developing resistance, providing a new technical solution and candidate agent for the green and sustainable control of areca nut leaf spot disease.

The invention discloses application of luteolin to prevention and treatment of areca leaf spot disease, and belongs to the technical field of biological prevention and treatment. By adding luteolin into the culture medium, the growth rate of phomopsis is remarkably reduced. The areca seeds are pretreated by luteolin solution and then inoculated with pathogenic fungi, compared with unpretreated plants, germs show lower pathogenicity, effective prevention and treatment of plant pathogenic fungal diseases are achieved, meanwhile, the effects of environmental pollution and harm to human bodies are reduced, and compared with traditional chemical pesticides, the areca seeds have the advantages that the cost is low, and the effect is obvious. And the toxicity to a human body and the environment is lower. Experiments show that when the final concentration of luteolin reaches 50 [mu] g / mL, the growth rate of phomopsis is significantly reduced; and when the concentration of the luteolin reaches 0.2 mu g / mL, the pathogenicity of phomopsis can be obviously reduced. The invention provides a novel biological prevention and control method for preventing and controlling the leaf spot disease of the areca seeds.