harzianum is found naturally in soil, but also is a potential
antagonistic fungus which prevents the crops from diseases viz. root
rots, wilts, brown rot, damping off, charcoal rot and other soil born
diseases in crops. Trichoderma harzianum competes in the soil for
nutrients and rhizosphere dominance with phyto-pathogenic fungi. In
presence of sufficient organic carbon it produces enzymes having
lytic effect on target fungi and in contrast in adverse conditions it
produces toxins which are equally harmful. So, it is a natural bio-fungicide, highly effective in controlling wide
range of soil borne disease caused by Fusarium, Rhizoctonia, Pythium,
Schlerotium, Verticillium, Alternaria,ustilogo spp., botrytis cinerea
cereals, pulses, oil seeds , cotton, capsicum, chilies, cauliflower,
tomato, potato, onion, peas, beans, ginger, turmeric, cardamom, tea,
coffee, apple, citrus, grape, pomegranate, banana, ornamentals, etc.
strains induce plants to turn on their native defense mechanisms
offers the likelihood that these strains also will control pathogens
other than fungi.
possess innate resistance to most agricultural chemicals, including
fungicides, although individual strains differ in their resistance.
Rhizoctonia, Pythium, Schlerotium, Verticillium, Alternaria, Ustilogo
spp., Botrytis cinerea etc.