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BotryStop WP Organic Fungicide

SKU: 2U98A61
Regular price $428.00
Unit price

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BotryStop® WP Organic Fungicide is an effective biological fungicide developed specifically for the control of pathogens such as botrytiscinereasclerotinia sclerotiorum and monilinia and many more.

BotryStop utilizes the naturally occurring non-pathogenic saprophytic fungus ulocladium oudemansii (strain U3), a novel new biological weapon and approach to organically fight tough diseases. This beneficial microbe provides protection to blossoms, fruit and plant tissue. When BotryStop spores are deposited on the dead and senescent plant debris they germinate and colonize. The developing mycelia proceed to colonize dead tissue and additional sporulation can occur. These new spores are then available to colonize remaining plant debris. BotryStop aggressively occupies the same physical space and out-competes pathogens for the nutrients in dead and senescing plant tissue.



  • Water-dispersible granular formulation.
  • Excellent tool for resistance management.
  • Tank-mix compatible with some chemical inputs.
  • Control as good as a full-season chemical program can be achieved with a BotryStop program.
  • OMRI Listed for organic production.
  • Exempt from residue tolerance.
  • Use at or before the first sign of disease.
  • 4-hour REI, 0-day PH.

BotryStop is organic and environmentally-friendly, can be used for a wide array of tough to cure diseases and is safe for pets, animals and children.


BotryStop WP Organic Fungicide is Labeled for the Following Diseases


BotryStop Fungicide can be applied to a wide variety of field, greenhouse and high-tunnel grown trees, vegetables*, grapes and other small fruits. It can also be applied to ornamentals in greenhouses and nurseries. It is NOT labeled for use on vegetables and for certain diseases in California. Please see label for details and check with your local laws to ensure this product can be used in your area.

  • Gray mold
  • Brown rot blossom blight
  • Jacket rot
  • Green fruit rot
  • Botrytis blight
  • Mummy berry*
  • Botrytis leaf blight*
  • Botrytis neck rot
  • Sclerotinia head and leaf drop*
  • Stem rot
  • Erwinia amylovora
  • Sclerotinia sclerotiorum
  • Jacket rot
  • Green fruit rot
  • Fire blight*
    ...See label for full list of diseases

*Not labeled for use in California.



General Application:

  • Apply BotryStop at a range of 2-4 lbs. per acre. The most common rate is 3 lbs. per acre.

Powdery Mildew:

  • To cure powdery mildew, apply up to the maximum rate (5 lbs. per acre) every week for three weeks.
  • Do not exceed 2.0 tbsp. per gallon of water per week (equivalent to 5 lbs. per acre per week.)
  • Shorten the interval during rainy weather or during periods of high relative humidity.
  • Use sufficient water volume to provide complete coverage and wetting of plants.
  • A non-ionic surfactant or spreader sticker must be used when making applications.
  • Use of organosilicone surfactants is beneficial when spraying low water volumes (below 50 gallons per acre). Do not use organosilicone surfactants that claim to be “penetrants” or “stomatal flooders or infiltrators”.
  • Ensure constant agitation throughout the loading, mixing and application operations.
  • Multiple applications may be needed depending on crop and disease pressure.

For BotryStop Compatibility Chart Click Here.



Ulocladium oudemansii (U3 Strain) ................................................... 45%*.
*Contains not less than 8 x 107 cfu/gram.



  • 6 lb. Bag (Covers 2 acres on average).
  • 12 lb. Bag (Covers 4 acres on average).









Our sister company, Green Earth Ag & Turf, brings a decade of experience as the U.S. leader in providing Professional Landscapers, Farmers and Indoor Growers like you the best in organic products for higher yields, aesthetics and profits!  Discounted professional or wholesale prices can be found there.

to quickly and easily open a wholesale account with us or to get bulk and professional pricing. 

You can also contact us directly at (866) 374-5101 or for the top technical and customer service in the industry.  

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