RootShield® WP Biological Fungicide - 3lb - OMRI Listed®

RootShield® WP Biological Fungicide 3lb — OMRI Listed® | Trichoderma harzianum T-22 | 12-Week Root Protection

RootShield WP is a wettable powder biological fungicide containing Trichoderma harzianum Rifai strain T-22 — a proven biocontrol organism that colonizes plant roots and shields them against soil-borne pathogens. T-22 establishes in the root zone through competitive exclusion and parasitism of fungal pathogens, physically occupying root infection sites and producing antifungal compounds that suppress root rot organisms. One application at transplanting, seeding, or propagation provides up to 12 weeks of root protection. The wettable powder formulation is designed for drench or dip application — compatible with standard irrigation and transplanting programs. REI: 0 hours. OMRI Listed.

Key Features & Benefits

• Trichoderma harzianum Rifai Strain T-22: One of the most extensively researched and proven biocontrol Trichoderma strains — T-22 is selected for consistent root colonization and reliable disease suppression across a wide range of soil types and crop species.
• Grows on Roots — Living Shield: T-22 establishes on root surfaces and in the rhizosphere — outcompeting pathogens for root infection sites and producing secondary metabolites that suppress soil-borne fungi.
• 12-Week Protection from One Application: Persistent root zone colonization provides lasting disease protection throughout the critical early crop establishment period.
• Controls Soil-Borne Pathogens & Root Diseases: Effective against major root rot organisms. See label for complete pathogen list.
• Wettable Powder — Drench or Dip Application: Mix per label instructions and apply as a substrate drench, bareroot dip, or cutting/seed treatment.
• 0-Hour REI: No re-entry restriction after application.
• OMRI Listed® for Organic Use.

Frequently Asked Questions

How does RootShield WP differ from RootShield PLUS+?

RootShield WP contains a single active ingredient: T. harzianum T-22. RootShield PLUS+ adds a second strain (T. virens G-41) for broader pathogen coverage. RootShield WP is the proven foundational product; RootShield PLUS+ provides enhanced coverage for operations dealing with a wider range of root pathogens.

How should RootShield WP be applied?

Mix the wettable powder into water per label rates and apply as a substrate drench at transplanting or seeding, or as a bareroot dip treatment. See the product label for specific rates by crop type and application method.

How long does RootShield WP protect roots?

One application provides up to 12 weeks of root protection as Trichoderma colonizes and persists in the root zone throughout early crop development.