How do I know which concentration to buy?

Consumer (RTU/concentrate) products are formulated for homeowner application rates. Professional-grade concentrates require accurate dilution — mistakes in either direction reduce effectiveness or create safety hazards. If you're new to pesticide application, start with ready-to-use formulations and work up to concentrates once you understand mixing and rates.

Can I mix this with other pesticides?

Tank mixing is common in professional applications but requires compatibility testing and label compliance. Never mix pesticides unless both labels permit it. One safe and effective combination: pair an adulticide with an IGR — they attack different life stages and don't interfere with each other.

How long does the treatment remain effective?

Residual activity depends on formulation, surface, UV exposure, and temperature. Micro-encapsulated formulations last longest (4–12 weeks). Wettable powders and emulsifiable concentrates typically last 2–6 weeks outdoors. Indoor applications on non-porous surfaces can persist significantly longer.

Is this product safe for use around pets and children?

All pesticides have some level of toxicity — 'safe' means used correctly according to the label. Keep children and pets out of treated areas until completely dry (minimum 2–4 hours for most sprays). For households with infants or chemically sensitive individuals, discuss low-exposure options (baits, dusts, IGRs) with a pest management professional.

Sulfur Fungicide/Miticide

⚖️ Educational use only. Always read and follow the full product label — the label is the law under FIFRA. Full disclaimer → | ⚗️ Mixing Calculator →

🏷️ Brand Names — Same Active Ingredient

Bonide Sulfur Plant Fungicide — consumer dust/WP

Safer Brand Garden Fungicide — consumer spray

Kumulus DF — BASF — professional WDG

Microthiol Disperss — Certis — professional WDG

🎯 What It Kills

✓ Powdery Mildew✓ Rust✓ Brown Rot✓ Scab✓ Spider Mites (supplemental)

⚙️ How It Works

Elemental sulfur is one of the oldest pesticides — both fungicide and mild miticide. Works by interfering with electron transport in fungal cells. OMRI-listed. Particularly effective against powdery mildew when applied preventively.

⚗️ Mixing & Application

Sulfur WP: 3 tablespoons per gallon for garden use. Dust applied directly to foliage. Preventive — stops new infections. Incompatible with oil sprays — allow 2 weeks between applications.

⚗️ Open Mixing Calculator →

⚠️ Safety

⚠ NEVER apply above 90°F — severe phytotoxicity
⚠ Do not apply within 2 weeks of oil-based sprays
⚠ Dust formulation requires respirator
⚠ Corrosive to some metals — flush sprayer thoroughly

📋 Safety Data Sheet (SDS)

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Bonide Sulfur Plant Fungicide — Safety Data Sheet

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📄 Search for this SDS on CDMS →

📄 Bonide Sulfur Plant Fungicide — Safety Data Sheet · View the complete SDS document above or download below

📄 CDMS Label & SDS Database 📄 EPA Label Search

📚 Sources: EPA Pesticide Labels · NPIC Pesticide Info

Published: Jan 1, 2025 · Updated: Apr 7, 2026

Sulfur Fungicide/Miticide — Bonide, Kumulus