PlantShield protects roots from many pathogens including the root diseases Pythium, Rhizoctionia, Fusarium, Thielaviopsis and Cylindrocladium. Within 24 hours RootShield blocks and actively attacks pathogens by “eating” them: ensuring uninterrupted plant growth. PlantShield HC can be drenched into the soil for root rot protection. One application protects roots for up to 12 weeks and costs less than 2¢ per 6-in pot.