Growers Domain
RootShield Plus - WP by BioWorks
RootShield Plus - WP

An OMRI listed and EPA registered preventative fungicide - RootShield Plus WP contains two species of beneficial fungi that deliver an extended range of disease control. The two species are:

  • Trichoderma harzianum Rifa strain T-22
  • Trichoderma virens strain G-41.

Apply RootShield Plus WP directly to seeds, transplants or other propagation materials including soil and planting mixes. The unique fungal blend in RootShield Plus WP provides 3 months of preventive control for Phytophthora , Rhizoctonia , Pythium , Fusarium , Thielaviopsis , and Cylindrocladium . Trichoderma helps prevent and control soil-born fungal diseases by colonizing plant root systems and boosting biological diversity in the root zone.


RootShield Plus WP grows onto plant roots, "shielding" plants from soil-borne diseases. This forms a physical barrier preventing root damage, while the fungi in RootShield Plus WP release enzymes that damage fungal pathogens. RootShield Plus is also available in a granular formulation .

REI: 0-hour, 4-hour when used as a dip or dust.

PHI: 0-day pre-harvest interval for all listed crops.

Suggested Uses: For prevention and control of major fungal pathogens and resultant diseases on greenhouse and nursery vegetables, herbs, ornamentals, fruits, conifer tree seedlings, various trees, legumes, oil seeds and peanuts. This product can be used in conjunction with certain fungicides. Refer to the product label and product compatibility sheet for details.



Shelf Life: Frozen: 12 months, Refrigerated: 9 months, Room temperature: 6 months

Active Ingredients/Guaranteed Analysis:

Trichoderma harzianum Rifai strain T-22*.....1.15%
Trichoderma virens strain G-41**..................0.61%

*Contains at least 1.0 x 10 7 colony forming units per gram dry weight.
**Contains at least 5.3 x 10 8 colony forming units per gram dry weight.


OMRI Certified
Product Details
Trichoderma harzianum Rifai strain T-22
Trichoderma virens strain G-41
  • RootShield Plus - WP Product Label
  • RootShield Plus - WP Additional Product Information
  • RootShield Plus - WP Cannabis Sheet
  • RootShield Plus - WP Compatibility with Biological Control Agents
  • RootShield Plus - WP Drench Application Guide
Use & Instructions

Use at the time of planting or early in the growing season for best results. One application provides up to three months of control. RootShield Plus WP is for use in soil applications (soil drench, in-furrow spray, and chemigation), seed treatments, and cutting or bare-rooted transplant dips on food crops, ornamentals, landscape plants, and ornamental trees, including tree seedlings for transplanting into the forest. Refer to the RootShield Plus WP product label for application rates by crop type. RootShield Plus WP should be applied via ground applications only.


Storage: Store in original container. RootShield Plus WP can be refrigerated or frozen to extend shelf life.

Diseases & Pests Controlled
  • Phytophthora
  • Rhizoctonia
  • Pythium
  • Fusarium
  • Thielaviopsis
  • Cylindrocladium
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