ARBICO Organics

BotryStop WP - 12 lb bag - 2U98A61

SKU: ARBC-1332840
Shipping calculated at checkout.

BotryStop WP is an organic wettable powder biological fungicide based on a naturally occurring, non-pathogenic saphrophytic fungus known as Ulocladium oudemansii (U3 strain). This live spore preparation has been developed as a preventative specifically to control common plant pathogens such as Botrytis cinerea, Sclerotinia sclerotiorumand Monilinia spp.

BotryStop WP has a unique mode of action in that it aggressively occupies the same ecological space as plant pathogens and will out-compete them for nutrients. This process begins when you apply BotryStop WP spores to dead and senescent plant debris. Once applied, they will germinate and then colonize the plant debris until further sporulation occurs. Once that happens, the new spores will spread to available space on remaining dead and senescing tissue, depriving the pathogens of their room and board. This thriving colony of Ulocladium oudemansii provides protection from pathogens to fruit, blossoms, and plant tissue.

  • Can be used in conventional or organic growing
  • Easy to apply and leaves no residue
  • Non-invasive and poses and no threat to living tissue
  • Exempt from residue tolerances, making it an excellent tool for resistance management programs
  • Using with a non-ionic surfactant or spreader sticker is recommended
  • DO NOT apply through any type of irrigation system
  • 4-hour REI (Restricted Entry Interval) and a 0-day PHI (Pre-Harvest Interval)
  • Stable at room temperature for up to 12 months - no refrigeration needed
  • Makes an exceptional addition to any Integrated Pest Management (IPM) program


Use the CRD Botrytis Test Kit to confirm the disease and test regularly for early intervention.

Botrystop WP can be applied to long list of crops grown in fields, orchards, nurseries and high tunnels. Some of these crops include berries and small fruits, edible flowers, grapes, hemp, ornamentals, pome fruit (apples, pears, etc.), stone fruits (cherries, peaches, plums, etc.), strawberries, tobacco, tree nuts (almonds, etc.) and vegetables.

This Product Controls These Pests or Diseases: Gray Mold (Botrytis cinerea), Botrytis Leaf Blight (Botrytis squamosa)*, Botrytis Neck Rot (Botrytis allii), Brown Rot and Blossom Blight (Monilinia spp), Jacket Rot and Green Fruit Rot (Botrytis cinerea, Monilinia spp, Sclerotinia sclerotiorum), Sclerotinia Head and Leaf Drop*, Sclerotina Stem Rot and Erwinia amylovora. Please refer to the manufacturer's label under the DOCS tab for more information, including crop specific diseases.