Pythiaceae
Pythiaceae is a family of water moulds. The family includes serious plant and animal pathogens in the genus Pythium. The family was circumscribed by German mycologist Joseph Schröter in 1893.Lifecycle
The sporangia may germinate via a germ tube or by release of motile zoospores, depending on the species and the environmental conditions.Some Pythium species cause "damping off" diseases in young plants.