Trichoderma spp. are free-living fungi commonly widespread in soil and root ecosystems. Trichoderma species are considered as one of the most active antagonistic fungi, having broad spectrum biocontrol activity against several phytopathogens. Their biocontrol activity is primarily due to the mycoparasitism of pathogenic fungi, nutrient competition, antibiosis through secretion of hydrolytic enzymes and secondary metabolites. Moreover, it also induces plant defence network to empower the plant against invading pathogens. Commercial application of Trichoderma either to increase crop health or to manage plant diseases depend on the development of commercial formulations with suitable carriers that support the survival of Trichoderma for a considerable length of time. Solid state fermentation is an effective method for the mass production of fungal biopesticides since it provides micropropagules with higher conidia content. Oil based formulations are prepared by mixing the conidia harvested from the solid state/liquid state fermentation with a combination of vegetable/mineral oils in stable emulsion formulation. Oil-based formulations are best for conidial biological control formulations because of their greater ability to adhere to the substrate. Moreover, such formulations slow down the desiccation process under conditions of fluctuating environmental factors such as temperature and relative humidity. Major research on biocontrol is centered with the use of spores of Trichoderma directly to seed. Technologies become viable only when the research findings are transferred from the lab to field. Though Trichoderma has a very good potential in the management of diseases, it could not be used as spore suspension under field conditions. Thus, the culture of Trichoderma should be immobilized in certain carriers and should be prepared as formulations for easy application, storage, comer - cialization, and field use.