Fifteen Fusarium oxysporum
isolates from diseased parasitic weeds ( Striga hermonthica
plants) were evaluated over two years (1997-98) to identify the most effective isolates for the control of the parasite in infested sorghum fields in Burkina Faso. In both years the fungus was found to reduce Striga
infection in sorghum by 50% although no significant differences were found among the 15 isolates in this respect. In 1997, Striga
emergence was delayed by 10 days and the 47% reduction in Striga
biomass is attributed to the effects of fungal isolates, whereas in 1998, Fusarium
reduced emerged Striga
densities by 45%. However, there is need for improved bioherbicide formulations and delivery systems to enhance the potential role of biological control for integrated management of the parasite in Burkina Faso.