Quali-Pro Mefenoxam 2 AQ Fungicide — 22.5% Mefenoxam 1 Gallon

Systemic Root and Stem Disease Control for Up to 3 Weeks — 22.5% Mefenoxam Aqueous Formula

Pythium and Phytophthora root and stem diseases are among the most destructive pathogens in turf, ornamental, and nursery production — and they spread fastest under the wet, warm conditions that are hardest to avoid. Quali-Pro Mefenoxam 2 AQ Fungicide delivers 22.5% Mefenoxam in a water-based, low-odor aqueous formulation that penetrates roots and stems systemically to stop these soilborne pathogens before they destroy stand density or plant health.

Mefenoxam is a Phenylamide fungicide (FRAC Group 4) that disrupts RNA synthesis in Oomycete pathogens, providing highly specific and highly effective control of Pythium spp., Phytophthora spp., and related water molds. A single application provides protection for up to 3 weeks, reducing the application frequency needed compared to contact-only fungicides. The water-based AQ formulation produces low odor — a practical advantage in enclosed greenhouse environments and residential landscape settings where traditional EC formulations raise concerns.

Mefenoxam 2 AQ makes an excellent tank-mix partner with most other fungicides, including Quali-Pro's own Chlorothalonil for added Brown Patch control during stressful summer months. It is labeled for nursery, greenhouse, landscape, turf, and tree settings, providing flexible deployment across the full range of commercial and professional ornamental and turf applications.

Key Features & Benefits

• 22.5% Mefenoxam — Maximum-Rate Aqueous Formulation — Delivers the phenylamide active ingredient at 22.5% concentration for strong systemic penetration into root and stem tissue where Pythium and Phytophthora establish.
• Up to 3 Weeks of Protection Per Application — Extended residual activity reduces the number of applications required per season, lowering total program cost and labor compared to shorter-residual contact fungicides.
• Water-Based, Low-Odor Formula — The AQ aqueous formulation avoids the strong solvent odor of EC formulations, making it more practical in greenhouse environments, enclosed nursery spaces, and residential landscape applications.
• Controls Pythium, Phytophthora, Downy Mildew, and Yellow Tuft — Targets the Oomycete pathogens responsible for damping-off, root rot, crown rot, and foliar blights that devastate seedlings and established ornamentals.
• Excellent Tank-Mix Compatibility — Combines cleanly with most other fungicides, including Chlorothalonil, expanding disease spectrum coverage in a single spray pass without compatibility issues.
• Multi-Site Labeled Flexibility — Registered for nursery, greenhouse, landscape, turf, and tree applications, making it a versatile solution across commercial and professional growing operations.
• 1-Gallon Size for Commercial Programs — Well-suited for greenhouse operations, nursery production facilities, and lawn care accounts where Pythium or Phytophthora pressure recurs seasonally.

Who Should Use Quali-Pro Mefenoxam 2 AQ

Mefenoxam 2 AQ is the product of choice for greenhouse growers, nursery producers, golf course superintendents, and landscape contractors dealing with recurring Pythium or Phytophthora pressure. It is particularly effective in high-moisture, high-temperature environments where Pythium damping-off in seedling production, Pythium blight in turf, or Phytophthora root rot in container nursery stock are ongoing seasonal threats. The low-odor AQ formulation makes it well-suited for enclosed greenhouse and interior landscape environments where worker comfort is a consideration.

Diseases Controlled

Mefenoxam 2 AQ controls Pythium spp. (root rot, damping-off, Pythium blight), Phytophthora spp. (root rot, crown rot, foliar blight), Yellow Tuft, and Downy Mildew. Labeled for use in nursery, greenhouse, landscape, turf, and tree settings. Not registered for use in Alaska.

Frequently Asked Questions

Is Quali-Pro Mefenoxam 2 AQ the same as Subdue MAXX?

Yes. Mefenoxam 2 AQ contains 22.5% Mefenoxam — the same active ingredient and concentration as Syngenta Subdue MAXX. It is a generic equivalent manufactured by Control Solutions, Inc. and registered for the same labeled diseases and use sites. The AQ (aqueous) formulation shares the same active chemistry with a low-odor, water-based carrier.

How does Mefenoxam compare to phosphonate (phosphite) fungicides for Pythium control?

Mefenoxam (FRAC Group 4) and phosphonate fungicides (FRAC Group 33) both control Pythium and Phytophthora but through different mechanisms. Mefenoxam inhibits RNA synthesis directly, while phosphonates stimulate host defense responses. Mefenoxam generally provides faster curative activity against active infections, while phosphonates are often used preventively and can also boost plant immunity. Rotating them supports resistance management in programs with high Oomycete pressure.

How should Mefenoxam 2 AQ be applied — as a drench or foliar spray?

For root and stem diseases (Pythium root rot, Phytophthora root rot, damping-off), apply as a soil drench or through irrigation to move the active ingredient into the root zone where pathogens establish. For foliar diseases such as Downy Mildew, apply as a foliar spray to provide protective and curative coverage. Always consult the current label for application method, timing, and rate by target disease and crop.

Is Mefenoxam resistance a concern?

Mefenoxam resistance in Pythium and Phytophthora populations has been documented in some regions, particularly where phenylamide fungicides have been used exclusively over multiple seasons. Rotate Mefenoxam 2 AQ with fungicides from other FRAC groups (such as Group 33 phosphonates or Group 43 fluopicolide-containing products) to reduce selection pressure and extend the useful life of this chemistry.