Under greenhouse conditions, soil treatments with T. harzianum formulations two weeks before planting and at the
time of planting have significantly reduced pre- and post-emergence off leaf spot disease of sesame caused by A.
sesame compared to the untreated control (Table 2). Application of T. harzianum to infested soil at the time of planting
gave the highest reduction in disease incidence on sesame plants. Application of T. harzianum formulation at the time
of planting gave more reduction in disease severity (DS) than after two weeks of planting in post emergence off.