The invention relates to a biocontrol seed
coating agent for tomatoes and an application of the biocontrol seed
coating agent, and belongs to the technical field of applications of biocontrol
bacteria. In order to solve the problems of low efficiency of agricultural control and large
pollution of
chemical control aiming at a tomato damping-off
disease and
root rot, the invention provides the biocontrol seed
coating agent for the tomatoes. The biocontrol seed coating agent comprises a composite
microbial agent and auxiliary agents, wherein the composite
microbial agent is formed by compoundingof a fermented liquid of
bacillus velezensis WZ-37, a fermented liquid of
bacillus subtilis WXCDD105, a fermented liquid of
pseudomonas azotoformans WXCDD51, a fermented liquid of
bacillus amyloliquefaciens Ba and a fermented liquid of
bacillus subtilis Bs wy-1; and auxiliary agents comprise
gibberellin, a
thickening agent, a dispersant, a
film forming agent and a coloring agent. The composite
microbial agent provided by the invention has stable antibacterial effects on pathogens of the tomato damping-off
disease and
root rot, and the
growth inhibition rates of hyphae of the two
pathogenic bacteria both reach 100%; and the biocontrol seed coating agent is applied to prevent and control the tomato damping-off
disease and
root rot, and has the advantages of high efficiency, economy, safety and long
longevity of residues.