Biological prevention and control bacterial agent
A technology of bacterial agents and yeasts, applied in the direction of biocides, biocides, microorganisms, etc., can solve the problem of reducing
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Embodiment 1
[0054] Example 1, Isolation and Identification of Metschnikowia Yeast
[0055] Alternaria alternate (Fr.) Keissler] is isolated from the surface of winter jujube with natural disease in the field. After purification, it is inoculated on PDA medium. Make spore suspension 1×10 6 spore ml -1 .
[0056] Dongzao is harvested in Wudi, Shandong Province, China, and Junzao is harvested in Jiaocheng, Shanxi Province, China. Choose fruits that are free from diseases and insect pests, harmless, with the same maturity and size, put them into PVC bags after pre-cooling for 2 days, and store them in a -2°C refrigerator. During the test, the jujube fruit hardness was 12.53kg / cm 2 , The soluble solid content is 36.8%, and the total acid is 0.46%. The hardness of Junzao is 12.65kg / cm 2 , The soluble solid content is 33.2%, and the total acid is 0.37%. Before inoculation, jujube fruits were sterilized with 2% NaOCl for 2 minutes, rinsed with distilled water, and air-dried for later use. ...
Embodiment 2
[0091] Embodiment 2, Metschnikowia zizyphicola sp.nov XY201 T Biocontrol agent
[0092] 1. Seed solution
[0093] Metschnikowia zizyphicola sp.nov XY201 T Inoculate in a Erlenmeyer flask filled with liquid medium, cultivate for 2 days, insert into a seed tank equipped with liquid medium, cultivate for 2 days, and obtain seed liquid.
[0094] The temperature of the seed liquid culture is 25°C, the initial pH of the liquid medium is 5.5, and the ventilation rate is 80mMO 2 l -1 h -1 .
[0095] Dissolve beef peptone, yeast extract, sucrose and NaCl in water in the above-mentioned liquid medium (triangle flask, seed tank culture medium), and fill up the volume with water, and the concentration of the beef peptone in the liquid medium is 1.5% (mass percentage), the concentration of the yeast extract in the liquid culture medium is 0.5% (mass percentage), the concentration of the sucrose in the liquid culture medium is 2.0% (mass percentage content), the concentration of the ...
Embodiment 3
[0110] Embodiment 3, Metschnikowia zizyphicola sp.nov XY201 T antibacterial test
[0111] 1. Metschnikowia zizyphicola sp.nov XY201 T Inhibition of Postharvest Diseases of Winter Jujube
[0112]The plant is winter jujube; the diseases to be controlled are black spot disease, rot disease, brown rot disease and penicillium disease. The pathogen of black spot disease is Alternaria alternate (Fr.) Keissler] (Wang Jun, Xin Yucheng. Isolation and identification of the pathogen of winter jujube black spot disease. "Journal of Qingdao Agricultural University (Natural Science Edition)", 2007 Year 1, 21-23., the public can get it from Xue Menglin.); the pathogenic bacteria of the rot disease is Fusarium decemcellulare Brick. (Geng Haifeng, Zhang Lizhen, Niu Wei. Screening and identification. Food Science, 2010, 31 (9): 150-155., the public can obtain from Xue Menglin.); the pathogen of Penicillium expansum (Lk.) Thom] (Liu Yang, Zhang Haiyu , Han Tao. Screening and identification of...
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