Trichoderma viride is a kind of Trichoderma, which is widely distributed in nature and is often produced on wood, seeds and plant residues. Trichoderma viride can produce a variety of biologically active enzymes, one of the strains with the highest cellulase activity, and the cellulase produced has a degrading effect on crops, and the effect is very good. Trichoderma viride is a resource. Rich antagonistic microorganisms play an important role in plant pathological biological control.

1. Secretion of cell wall degrading enzymes of pathogenic bacteria to prevent the formation of pathogenic bacteria cell walls;

2. Produce secondary metabolites, block the growth and growth of pathogenic bacteria, increase the permeability, dry the fungal spores, and damage the cell membrane to destroy the growth of spore germination tubes;

3, competition, Trichoderma harzianum to capture or block the nutrients required by the pathogen, thereby inhibiting the growth of pathogenic bacteria.

4, heavy parasitic effect, Trichoderma harzianum tends to grow pathogenic bacteria, contact with pathogenic bacteria, produce a structure similar to the attachment, invade the pathogenic bacteria cells, and then decompose and use the pathogenic bacteria cell material, thereby killing the pathogenic bacteria.