51results about How to "Resist infection" patented technology

The invention relates to a bacterial strain for preventing and treating tobacco black shank and the bacteria agent thereof, which is characterized in that: the invention adopts paecilomyces lilacinusZY-19-2, the collection number is CCTCCNO: M207196, as the original bacterial strain to prepare the bacteria agent through a fermentation process, and the fermentation conditions are as follows: 0.8to2.0 percent of colloidal chitin is taken as a carbon source, the initial pH value of the fermentation fluid is 5.5 to 7.0, 0.8 to 1.5 percent peptone is taken as a nitrogen source, 0.1 percent Tween- 80 is taken as a surfactant, the fermentation time is 48 to 72h, the vaccination amount is 0.8 to 2 percent, and the rotational speed of a shaking bed is 100 to 180r / min. The invention has the following advantages that: 1. the paecilomyces lilacinus strain has fast growth, the producing capacity of chitin is strong; 2. the invention can decompose the body walls of flies and maggots and can growon the body walls of flies and maggots or a culture medium which is prepared by the decomposition products of the body walls and water; 3. the invention can be colonized at the root of a tobacco plantforresisting the infection of the tobacco black shank; 4. the invention can effectively overcome the antibacterial effect of the soil and maintain the suppression capacity of the tobacco black shankfora long time.