Pythium

Pythium is a group of water-borne pathogens capable of devastating plant roots across a wide range of agricultural crops, especially in hydroponics, greenhouses, nurseries, and poorly drained soils. Although commonly referred to as a “fungus,” Pythium belongs to a different biological group — oomycetes, or water molds. Its ability to spread rapidly through water makes it particularly dangerous in modern irrigation and recirculating systems.