BioWorks RootShield PLUS+ Biological Fungicide — 10 lb Granules

RootShield PLUS+ Granules is the next generation of BioWorks' flagship biological root disease control, powered by two active ingredients — Trichoderma harzianum strain T-22 (1.15%) and Trichoderma virens strain G-41 (0.61%). This dual-strain granular formula provides 3 months of preventative control of major soilborne root diseases, including expanded activity against Phytophthora and improved suppression of aggressive hot-season Pythium (P. aphanidermatum).

One application protects roots for up to 12 weeks, reducing or eliminating the need for repetitive chemical fungicide drenches and lowering both material and labor costs.

Key Features

• Active ingredients: Trichoderma harzianum T-22 (1.0 × 10⁷ CFU/g) + Trichoderma virens G-41 (5.3 × 10⁶ CFU/g)
• Controls Pythium, Phytophthora, Rhizoctonia, Fusarium, Thielaviopsis, and Cylindrocladium
• Up to 12 weeks of root protection per application
• Improved suppression of hot-season Pythium aphanidermatum
• OMRI listed for organic production
• Granular formulation — incorporate into growing media at transplant

Use Sites

Greenhouse and nursery ornamentals, vegetables, herbs, and fruits.

Also available: RootShield PLUS+ WP 1 lb. Browse more Beneficial Microbiology or return to Pest & Disease Controls.