Tenet? WP is a second-generation biorational fungicide that contains two powerful species of beneficial Trichoderma fungi that effectively control or suppress soil-borne diseases. Tenet? is highly effective against Fusarium spp., Phytophthora spp., Pythium spp., Rhizoctonia spp., Sclerotinia spp., Sclerotium rolfsii, Thielaviopsis basicola, Verticillium spp., as well as Armillaria sp and Rosellinia sp. When applied, the active ingredients grow in the soil and around the plant?s root system using multiple modes of action to suppress and destroy disease-causing fungi.