Composite biocontrol bacterial seed treatment agent containing streptococcus thermophilus, preparation method and application

Abstract

The present invention provides a composite biocontrol bacterial seed treatment agent containing Streptococcus thermophilus, a preparation method and an application, belonging to the technical field of biological pesticides. The seed treatment agent is a solid powder consisting of 80% to 90% effective active component and 10% to 20% auxiliary materials. The effective active component is an equal-proportion composite bacterial fermentation broth concentrate solidification product of Bacillus subtilis, Bacillus cereus, Bacillus thuringiensis and Streptococcus thermophilus. In the present invention, the fermentation concentrate of multiple bacterial strains is mixed with a carrier and spray- dried to obtain the composite bacterial fermentation broth concentrate solidification product; then the solidification product is mixed with the auxiliary materials to obtain the present invention.