RootShield from BioWorks is a highly effective biological fungicide that protects roots from the most common root diseases affecting greenhouse, nursery and vegetable crops. The active ingredient, Trichoderma harzianum strain T-22, prevents Pythium, Rhizoctonia, Fusarium, Cylindrocladium and Thielaviopsis by blocking and actively attacking the pathogens – “eating” them before they reach the root system. This promotes a healthier root system, increasing root mass potential, and ensures uninterrupted plant growth.