42results about How to "Address abuse" patented technology

The invention discloses a DSF quorum sensing signal molecule quenching bacterium and its application in plant disease control. The present invention studies and finds copper greedy bacteria ( Cupriavidus sp.) can grow and reproduce with DSF as the sole carbon source, nitrogen source and energy source, and has a significant degradation effect on higher concentrations of DSF; at the same time, the present invention also provides a strain HN-copper greedy bacteria that efficiently degrades DSF 2. The strain was deposited in the Guangdong Microbial Culture Collection Center on August 13, 2018, with the preservation number GDMCC NO: 60432. Copper greedy bacteria HN‑2 has significant degradative activity on quorum sensing signal molecules in plant pathogens, and is environmentally friendly, and has great applications in the control of pathogenic plant pathogens mediated by DSF and / or DSF signal molecule analogs At the same time, the invention can reduce the problem of antibiotic abuse and pesticide residue pollution, reduce environmental pressure, provide a new idea for biological control of plant diseases, and has great application value and broad application prospects.

The invention provides two different composite microbial flora powders, wherein a microbial flora A comprises 40% of lacbobacillus helveticus and 60% of lacbobacillus fermentum; and the microbial flora B comprises 50% of bacillus subtilis and 50% of bacillus licheniformis. The application method comprises that: the microbial flora powder A is added into a feedstuff according to a proportion of 0.2-0.4%, and the microbial flora powder B is added into drinking water according to a proportion of 0.05-0.1%. A preparation method comprises the steps that: with a liquid fermentation method, soybean is adopted as a fermentation raw material; through twice amplification, various strains are respectively cultured to a logarithmic growth phase (pH value is 4-5); microbial powder with water content no higher than 5% and viable cell amount no lower than 108 / g is obtained through spray-drying; and the microbial powder A and microbial powder B are obtained. With the additives provided by the invention, poultry and livestock disease infection and spreading can be effectively prevented; poultry and livestock product meat quality can be greatly improved, poultry and livestock slaughter rate can be improved, the use of antibiotics and chemical additives is reduced, feedstuff and culture water are saved, and economic and social benefits are improved. The additives are ideal composite microbial feed additives.