Freshwater aquaculture source pseudomonas for inhibiting and killing saprolegnia dogwood

The invention relates to a freshwater aquaculture source pseudomonas capable of inhibiting and killing saprolegnia dogwood. The freshwater aquaculture source pseudomonas is pseudomonas monkey TGYZ, and the preservation number of the freshwater aquaculture source pseudomonas is CGMCC (China General Microbiological Culture Collection Center) NO.24227. The invention also relates to a preparation method of the freshwater aquaculture source pseudomonas. The strain provided by the invention can cause a large amount of hyphae and spores in capsules to escape and die by destroying the hypha tube wall and sporangium wall of saprolegnia, thereby realizing efficient inhibition and even killing of the growth of the main bacteria of fish in China, namely saprolegnia dogwood. The pseudomonas is a common bacterium in a freshwater aquaculture environment, so that the reasonable use of the pseudomonas does not cause harm to the aquaculture environment, and the pseudomonas has a wide application prospect. 本发明涉及一种抑杀多子水霉的淡水养殖源假单