Nowadays, biological control of weeds using fungi is gaining importance. Water hyacinth is a good candidate for biological control with foliar plant pathogens, since it spreads mainly through offshoots. Several studies were carried out on the exploitation of fungal pathogens for the management of water hyacinth (1, 4, 6, 9). The Abbott Laboratories, USA developed an experimental formulation of Cercospora rodmanii (ABG-5003) against E. crassipes (12