RootShield WP Biological Fungicide - 1 lbBefore you plant, apply OMRI listed RootShield WP (Wettable Powder) to protect plant roots from common soil borne pathogens. RootShield WP is a certified organic soil inoculant that uses the highly effective hybrid fungus Trichoderma harzianum, Rifai strain KRL AG2, to kill Pythium, Rhizoctionia, Fusarium, Thielaviopsis and Cylindrocladium species. Reducing stress and increasing root mass results in healthier growth and larger yields. RootShield WP is