Dora Rootguard Vs Bioworks RootShield(Trichoderma Harzianum T-22) Leave a Comment / Field Trial / By dora In 2019, Dora team tested Dora Rootguard and Bioworks Rootshield (Trichoderma harzianum strain T-22) against strawberry root rot and anthracnose (Under the acidic condition pH=3).