Disease Control



Biological Organic Fungicide

BioWorks PreFence Biofungicide BioWorks PreFence is an excellent product that provides added efficacy against root diseases in programs with RootShield® PLUS+. PreFence contains mycelium and spores of the naturally occurring bacterium Streptomyces sp. strain K61.

PreFence can be used in combination with RootShield PLUS+ for the control of Fusarium plus other root diseases including RhizoctoniaPythium and Phytophthora or with CEASE and/or MilStop for the control of Botrytis. Start your preventative program with RootShield PLUS+. If you are anticipating higher pressure from root diseases, then PreFence can added as a supplemental treatment. Adding another bio-control agent with increased multiple modes of action will assist with the higher foliar and fruit disease pressures.

PreFence Benefits

• Contains a naturally occurring bacterial strain isolated from Sphagnum peat
• A reliable tool to control damping-off, wilt and root diseases
• Promotes plant growth
• Induces plant defense mechanisms against diseases
• Effective in soils or organic and inert soilless media
• Approved for organic production (OMRI listed)
• Compatible with biological and integrated pest management programs
• Very low risk of resistance
• Long-lasting impact on the entire plant
• Safer for humans, the environment and beneficials

PreFence is organic and environmentally-friendly and is great in combination with other fungicides to increase disease control and decrease the chance of resistance.

PreFence is Labeled for the Following Diseases

PreFence Biofungicide can be used for the control of seed rot, root and stem rot and wilt diseases caused by FusariumAlternaria and Phomopsis in ornamentals, vegetables, tobacco*, cotton*, corn, peanuts*, soybeans, wheat, sorghum, beans, peas, and tree and forest seedlings. PreFence Biofungicide can also be used for the control of seed rot, root rot and stem rot and wilt diseases caused by Fusarium in turf.
PreFence Biofungicide has shown suppression of Botrytis Gray Mold and root rots caused by PythiumPhytophthora and Rhizoctonia.
PreFence Biofungicide has shown suppression of Early Blight (Alternaria solani) on greenhouse Solanaceous plants; suppression of Septoria on tree seedlings in the field*; and control of Dry Bubble (Lecanicillium fungicola) in mushrooms in mushroom cultivation*. PreFence Biofungicide can be used as a seed treatment for seed or soil-borne damping off and early root rot of vegetables, herbs, tobacco*, legumes, corn, cotton*, peanuts*, wheat, sorghum, trees, conifers and ornamentals planted in the field or greenhouse.

See label for a full list of diseases and applications.

*Not for use in California.

PreFence General Treatment

Soil Spray or Drench: Use 0.176oz. per 1.3 gallon of water per 400 sq ft. (or more simply, 1 oz in 7 gallons of water will cover 2,273 square feet; or 0.44 oz. in 3.25 gallons of water per 1,000 square feet).  Uniformly apply PreFence Biofungicide over the area to be treated. Follow with normal irrigation or sufficient water (1/8-1/4 inch) within 6 hours to move PreFence Biofungicide into the plant root zone
Turf: Apply PreFence Biofungicide in 1-3 pints of water per 100 sq ft. Repeat treatment every 4-6 weeks or as needed depending on disease pressure.
Seed Soak: PreFence Biofungicide has been proven effective when used as a 0.01% to 0.1% by weight seed soak when soaking seeds for 5-15 minutes immediately prior to planting.
Root Dips and Cuttings: PreFence Biofungicide may be applied by dipping roots of transplants or cuttings (including bare root seedlings), such as carnations, in a suspension shortly before planting. Use a suspension of 0.01% to 0.1% by weight.
Band, In-Furrow or Side-Dressing: Apply PreFence Biofungicide in 0.5-1.0 pints of water per treated 100 sq ft. as a side-dress application to the plant bed. Direct spray to base of plant and root zone. Repeat treatment every 2-4 weeks or as needed.

PreFence Active Ingredient

Streptomyces sp. Strain K61*....................................... 35%.
*Contains a minimum of 108 cfu (colony forming units) per 1 gram of product.

PreFence Available Sizes

  • 5 grams (0.18 ounce, covers 400 square feet).
  • 25 grams (0.88 ounce, covers 2,000 square feet).
  • 100 grams (3.5 ounces, covers 8,000 square feet).

Green Earth Ag and Turf

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