Rhizoctonia solani (Kuhn), Macrophomina phaseolina (Tassi) Ashby, Sclerotium rolfsii (Sacc.) and Fusarium spp. were found to be the most associated fungi with damping-off and charcoal-rot of sunflower plants in Behera Governorate. Rhizoctonia solani was the most pathogenic fungus, causing pre-emergence damping-off on sunflower (cv. Vedok). Meanwhile, M. phaseolina caused less disease incidence 15 days after sowing. In contrast, S. rolfsii was the most pathogenic fungus, causing post-emergence damping-off, 15 to 45 days after sowing. However, M. phaseolina was most effective to cause charcoal-rot , 45 to 90 days after sowing. Soil amendments with sulphur, compost and gypsum, either alone or in combination, recorded the highest reduction of pre-, post-emergence damping-off and charcoal-rot when compared with check (control) treatment in field experiments. Also, results indicated that the soil amendments improved growth characteristics and increased yield as well as oil contents of sunflower.