The common soil inhabiting fungus Trichoderma, including
Trichoderma harzianum, has been shown to control plant diseases
caused by a variety of plant pathogenic fungi (Harman,
2000; Papavizas, 1985). Biological control of plant diseases by
Trichoderma involves one or more of the following strategies:
competition, antibiosis, mycoparasitism and/or induction of plant
resistance.