Trichoderma Harzianum Biological Fungicide - Soil is a biological fungicide that features Trichoderma harzianum as its active ingredient. It is specifically formulated to control soil-borne diseases such as Pythium spp., Rhizoctonia spp., Fusarium spp., and Sclerotinia. In addition to its disease-fighting capabilities, it also enhances plant growth, particularly by supporting root development and the growth of aerial plant parts.