RootShield Plus WP OMRI Listed Biological Fungicide

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BioWorks

$137.77

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RootShield Plus WP Biological Fungicide | OMRI Listed

Protect plant roots with RootShield Plus WP, an OMRI Listed biofungicide for preventive root disease control in labeled greenhouse, nursery, and field crops.

RootShield Plus WP Biological Fungicide helps protect developing roots from damaging soilborne pathogens. This wettable powder combines two beneficial fungi—Trichoderma harzianum strain T-22 and Trichoderma virens strain G-41—that establish on growing roots and provide preventive disease protection.

Use RootShield Plus WP as part of a root health program for labeled greenhouse, nursery, field, landscape, and turf applications. It helps prevent root diseases associated with Pythium, Phytophthora, Rhizoctonia, Fusarium, Cylindrocladium, and Thielaviopsis. Apply before disease develops to give beneficial microbes an opportunity to colonize the root zone.

OMRI Listed for use in organic production with applicable restrictions, RootShield Plus WP also fits conventional growing programs and can be used with compatible crop protection products.

Product Details

Characteristic Details
Brand / Manufacturer RootShield / BioWorks, Inc.
Product Type Preventive biological fungicide
Formulation Wettable powder (WP)
Active Ingredients Trichoderma harzianum Rifai strain T-22: 1.15%
Trichoderma virens strain G-41: 0.61%
Other Ingredients 98.24%
EPA Registration No. 68539-9
OMRI Status OMRI Listed; allowed with restrictions for organic crop production
Manufacturer Package Sizes 1 lb, 3 lb, and 30 lb
UPC Number 852109003105 - 1 lb package only
Restricted-Entry Interval (REI) 4 hours for agricultural uses covered by the Worker Protection Standard
Preharvest Interval (PHI) 0 days for labeled crops
Signal Word CAUTION
Storage Refrigerate in the tightly closed original container; use before the package expiration date.
Not for sale to AK (Alaska)

Benefits of Using This Product

Feature Benefit
Two beneficial Trichoderma strains Provides broad preventive root disease protection, including activity against Phytophthora.
Root colonization Beneficial fungi grow with developing roots, helping protect the root system as plants establish.
Root growth support Supports root development and root hair growth, helping plants take up water and nutrients.
OMRI Listed Offers a biological disease management option for organic programs when listing restrictions are met.
Flexible applications Supports labeled drench, transplant dip, in-furrow, and chemigation treatments.
IPM compatibility Can complement compatible fungicides and other inputs in an integrated pest management program.

Where to Use

Use Site Examples of Labeled Uses
Greenhouses and nurseries Flowers, bedding plants, ornamentals, container crops and listed vegetable transplants
Field production Listed vegetables, berries, herbs, grains and other labeled agricultural crops
Landscapes Listed ornamental plants, shrubs and trees
Turf Labeled turf sites, including golf courses, sports fields and sod production; follow the separate turf directions.

Crop exclusions: Do not apply to sugarcane, pechay (bok choi), rice, mushrooms, kiwi, barley, oats, lemon, apple or chickpea. Do not use on aquatic crops. The label also excludes California uses on hemp, ginseng, tobacco, and the listed tropical/subtropical fruit group. Match every crop and application method to the product label.

Application Rates

The following are selected application rates. Product ounces are ounces by weight, not fluid ounces. Use the directions for the specific crop, site, and treatment.

Application Product Rate Application Notes
Greenhouse or container nursery drench 3–8 oz per 100 gallons of water Apply to the growing medium with continuous agitation.
Greenhouse and field chemigation 3–8 oz per 100 gallons of water Use only labeled irrigation systems and required safety equipment.
In-furrow spray or transplant starter 16–32 oz per acre
Equivalent to approximately 0.37–0.73 oz per 1,000 sq ft		 Use enough water for uniform placement; maintain agitation.
Cutting or bare-root transplant dip 0.25–1.5 lb per 20 gallons of water For applicable labeled crops; immerse for about 30 seconds. Tropical/subtropical fruit dip rates differ.

The per-1,000-sq-ft in-furrow rate is an area conversion of the acre rate, not a separate turf or landscape rate. Drench coverage depends on container depth and solution volume; there is no single acre coverage figure for all drench uses.

Greenhouse and Nursery Drench Volumes

After mixing at 3–8 oz per 100 gallons, apply the finished suspension at the appropriate volume:

Container or Growing Area Finished Solution Volume
Seeding flats, shallow beds or pots up to 4 inches deep 50–100 gallons per 800 sq ft
Deeper beds or pots 100 gallons per 400 sq ft
Individual deeper pots ½ cup (4 fl oz) for a 3-inch-diameter pot; 1 cup (8 fl oz) for a 6-inch-diameter pot

Mixing and Use Guidelines

  • Apply preventively. Treat before disease becomes established. For general root applications, the microbes become active above 50°F; turf has separate timing instructions.
  • Keep the powder suspended. Maintain constant agitation throughout mixing and application.
  • Check compatibility. Do not tank mix with imazalil, propiconazole, tebuconazole, or triflumizole, or apply immediately before those products. Follow compatibility guidance and all label restrictions.
  • Match the equipment to the site. Ground application only. Turf and landscape uses prohibit chemigation; greenhouse and field chemigation directions do not apply universally.
  • Follow label PPE requirements. These include protective eyewear, long sleeves, long pants, shoes, socks, and specified respiratory protection for mixers, loaders, and applicators.

Keep refrigerated in the original sealed container. Heat shortens microbial viability. The labeled maximum sale/use period is 10 months from manufacture; follow the package expiration date and storage instructions.

Always read and follow the complete container label. This product summary does not replace crop-specific directions, precautions, or application restrictions.

How is RootShield Plus WP different from RootShield WP?

RootShield Plus WP contains both T-22 and G-41 Trichoderma strains. Original RootShield WP contains T-22 alone. The Plus formulation expands the root disease protection spectrum to include Phytophthora.

Can RootShield Plus WP cure established root rot?

It is intended for prevention. Apply before disease develops; plants with established disease may require diagnosis and a compatible treatment program.

Can it be used in certified organic production?

Yes, subject to its OMRI listing restrictions and your organic system plan. Required preventive, cultural, mechanical, and physical management practices must be addressed; confirm use with your organic certifier.

How long can root disease protection last?

Root protection can last up to 12 weeks under suitable conditions. Application timing depends on the crop, production cycle, and growing conditions. Turf follows a separate, more frequent treatment schedule.

How much should I mix for a 1-gallon drench?

The 3–8 oz per 100-gallon drench rate converts to approximately0.85–2.27 grams per gallon. Use an accurate scale, keep the suspension agitated, and apply the correct finished volume for the containers being treated.

Is there a waiting period before harvesting treated crops?

The preharvest interval is 0 days for labeled crops. Follow all crop restrictions, application directions, and worker-entry requirements, including the 4-hour agricultural REI.

Category: Biological Fungicide, Fungicide, OMRI Listed, Wettable Powder

Type: Fungicide

Brand: BioWorks


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Description

RootShield Plus WP Biological Fungicide | OMRI Listed

Protect plant roots with RootShield Plus WP, an OMRI Listed biofungicide for preventive root disease control in labeled greenhouse, nursery, and field crops.

RootShield Plus WP Biological Fungicide helps protect developing roots from damaging soilborne pathogens. This wettable powder combines two beneficial fungi—Trichoderma harzianum strain T-22 and Trichoderma virens strain G-41—that establish on growing roots and provide preventive disease protection.

Use RootShield Plus WP as part of a root health program for labeled greenhouse, nursery, field, landscape, and turf applications. It helps prevent root diseases associated with Pythium, Phytophthora, Rhizoctonia, Fusarium, Cylindrocladium, and Thielaviopsis. Apply before disease develops to give beneficial microbes an opportunity to colonize the root zone.

OMRI Listed for use in organic production with applicable restrictions, RootShield Plus WP also fits conventional growing programs and can be used with compatible crop protection products.

Product Details

Characteristic Details
Brand / Manufacturer RootShield / BioWorks, Inc.
Product Type Preventive biological fungicide
Formulation Wettable powder (WP)
Active Ingredients Trichoderma harzianum Rifai strain T-22: 1.15%
Trichoderma virens strain G-41: 0.61%
Other Ingredients 98.24%
EPA Registration No. 68539-9
OMRI Status OMRI Listed; allowed with restrictions for organic crop production
Manufacturer Package Sizes 1 lb, 3 lb, and 30 lb
UPC Number 852109003105 - 1 lb package only
Restricted-Entry Interval (REI) 4 hours for agricultural uses covered by the Worker Protection Standard
Preharvest Interval (PHI) 0 days for labeled crops
Signal Word CAUTION
Storage Refrigerate in the tightly closed original container; use before the package expiration date.
Not for sale to AK (Alaska)

Benefits of Using This Product

Feature Benefit
Two beneficial Trichoderma strains Provides broad preventive root disease protection, including activity against Phytophthora.
Root colonization Beneficial fungi grow with developing roots, helping protect the root system as plants establish.
Root growth support Supports root development and root hair growth, helping plants take up water and nutrients.
OMRI Listed Offers a biological disease management option for organic programs when listing restrictions are met.
Flexible applications Supports labeled drench, transplant dip, in-furrow, and chemigation treatments.
IPM compatibility Can complement compatible fungicides and other inputs in an integrated pest management program.

Where to Use

Use Site Examples of Labeled Uses
Greenhouses and nurseries Flowers, bedding plants, ornamentals, container crops and listed vegetable transplants
Field production Listed vegetables, berries, herbs, grains and other labeled agricultural crops
Landscapes Listed ornamental plants, shrubs and trees
Turf Labeled turf sites, including golf courses, sports fields and sod production; follow the separate turf directions.

Crop exclusions: Do not apply to sugarcane, pechay (bok choi), rice, mushrooms, kiwi, barley, oats, lemon, apple or chickpea. Do not use on aquatic crops. The label also excludes California uses on hemp, ginseng, tobacco, and the listed tropical/subtropical fruit group. Match every crop and application method to the product label.

Application Rates

The following are selected application rates. Product ounces are ounces by weight, not fluid ounces. Use the directions for the specific crop, site, and treatment.

Application Product Rate Application Notes
Greenhouse or container nursery drench 3–8 oz per 100 gallons of water Apply to the growing medium with continuous agitation.
Greenhouse and field chemigation 3–8 oz per 100 gallons of water Use only labeled irrigation systems and required safety equipment.
In-furrow spray or transplant starter 16–32 oz per acre
Equivalent to approximately 0.37–0.73 oz per 1,000 sq ft		 Use enough water for uniform placement; maintain agitation.
Cutting or bare-root transplant dip 0.25–1.5 lb per 20 gallons of water For applicable labeled crops; immerse for about 30 seconds. Tropical/subtropical fruit dip rates differ.

The per-1,000-sq-ft in-furrow rate is an area conversion of the acre rate, not a separate turf or landscape rate. Drench coverage depends on container depth and solution volume; there is no single acre coverage figure for all drench uses.

Greenhouse and Nursery Drench Volumes

After mixing at 3–8 oz per 100 gallons, apply the finished suspension at the appropriate volume:

Container or Growing Area Finished Solution Volume
Seeding flats, shallow beds or pots up to 4 inches deep 50–100 gallons per 800 sq ft
Deeper beds or pots 100 gallons per 400 sq ft
Individual deeper pots ½ cup (4 fl oz) for a 3-inch-diameter pot; 1 cup (8 fl oz) for a 6-inch-diameter pot

Mixing and Use Guidelines

  • Apply preventively. Treat before disease becomes established. For general root applications, the microbes become active above 50°F; turf has separate timing instructions.
  • Keep the powder suspended. Maintain constant agitation throughout mixing and application.
  • Check compatibility. Do not tank mix with imazalil, propiconazole, tebuconazole, or triflumizole, or apply immediately before those products. Follow compatibility guidance and all label restrictions.
  • Match the equipment to the site. Ground application only. Turf and landscape uses prohibit chemigation; greenhouse and field chemigation directions do not apply universally.
  • Follow label PPE requirements. These include protective eyewear, long sleeves, long pants, shoes, socks, and specified respiratory protection for mixers, loaders, and applicators.

Keep refrigerated in the original sealed container. Heat shortens microbial viability. The labeled maximum sale/use period is 10 months from manufacture; follow the package expiration date and storage instructions.

Always read and follow the complete container label. This product summary does not replace crop-specific directions, precautions, or application restrictions.

FAQ
How is RootShield Plus WP different from RootShield WP?

RootShield Plus WP contains both T-22 and G-41 Trichoderma strains. Original RootShield WP contains T-22 alone. The Plus formulation expands the root disease protection spectrum to include Phytophthora.

Can RootShield Plus WP cure established root rot?

It is intended for prevention. Apply before disease develops; plants with established disease may require diagnosis and a compatible treatment program.

Can it be used in certified organic production?

Yes, subject to its OMRI listing restrictions and your organic system plan. Required preventive, cultural, mechanical, and physical management practices must be addressed; confirm use with your organic certifier.

How long can root disease protection last?

Root protection can last up to 12 weeks under suitable conditions. Application timing depends on the crop, production cycle, and growing conditions. Turf follows a separate, more frequent treatment schedule.

How much should I mix for a 1-gallon drench?

The 3–8 oz per 100-gallon drench rate converts to approximately0.85–2.27 grams per gallon. Use an accurate scale, keep the suspension agitated, and apply the correct finished volume for the containers being treated.

Is there a waiting period before harvesting treated crops?

The preharvest interval is 0 days for labeled crops. Follow all crop restrictions, application directions, and worker-entry requirements, including the 4-hour agricultural REI.
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