MilStop® SP Broad-Spectrum Foliar Fungicide - 5lb - OMRI Listed®

Potassium Bicarbonate Fungicide for Powdery Mildew Control

Powdery mildew colonies spread across a leaf surface quickly once established, and a fungicide that only slows growth rather than disrupting the existing colony leaves visible damage behind. MilStop SP works differently: its potassium bicarbonate active ingredient raises the pH on the treated leaf surface, disrupting the osmotic balance of fungal cells on contact and causing the colony to desiccate rapidly.

This 5 lb container is labeled across greenhouse, nursery, field crops, interiorscapes, and woody herbs, applied at 1 to 5 lbs per 100 gallons, and its 1-hour REI and Caution signal word make it one of the more worker-friendly fungicide options for high-frequency spray programs.

Key Features & Benefits

• Potassium bicarbonate mode of action — disrupts fungal cell osmotic balance on contact, causing rapid desiccation.
• Strong against powdery mildew — consistently effective in high-humidity greenhouse and interiorscape conditions.
• Broad-spectrum foliar coverage — also helps prevent a range of other foliar fungal diseases.
• 1-hour REI — among the shortest re-entry intervals available for a foliar fungicide.
• OMRI Listed — certified for organic production programs.

Who Should Use This

Greenhouse growers, nursery operators, and interiorscape managers dealing with persistent powdery mildew pressure who need a short-REI, organic-compliant fungicide are the direct fit for MilStop SP.

About BioWorks

BioWorks, founded in 1993 in Victor, New York, manufactures MilStop SP alongside its biological pest and disease control product lines.

Frequently Asked Questions

How does MilStop SP control powdery mildew?

Its potassium bicarbonate active ingredient raises the pH on the leaf surface it contacts, disrupting the osmotic balance of fungal cells and causing rapid desiccation of the mildew colony. This provides both curative and preventive activity.

What is the re-entry interval for MilStop SP?

The REI is just 1 hour, one of the shortest available for a foliar fungicide. This supports schedule flexibility in commercial production environments with frequent crop access.

Can MilStop SP be used on edible crops?

Yes, it is OMRI Listed and labeled for greenhouse and field crop use, including edible crops. See the product label for specific crop and rate guidance.

What is the application rate for MilStop SP?

Apply at 1 to 5 lbs per 100 gallons, adjusting within that range based on disease pressure and crop. Always follow the current product label for crop-specific rates.