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.

Thiamethoxam

⚖️ 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

Meridian 25 WG — Syngenta — professional turf/ornamental

Flagship 25 WG — Syngenta — ornamental — same product as Meridian

Actara — Syngenta — agricultural foliar/systemic

Platinum — Syngenta — soil drench vegetables

🎯 What It Kills

✓ Aphids✓ Whiteflies✓ Scale✓ Thrips✓ Leafhoppers✓ Grubs✓ Soil insects✓ Mealybugs

⚙️ How It Works

Thiamethoxam is a second-generation neonicotinoid. Meridian and Flagship are the same active ingredient at the same concentration — different labels, same product. Excellent systemic activity through foliar and soil routes.

⚗️ Mixing & Application

Meridian/Flagship 25WG: 1.0–1.5 oz per 100 gallons for ornamental foliar. Soil drench: 0.07–0.14 oz per 1,000 sq ft. Do not apply to blooming plants.

⚗️ Open Mixing Calculator →

⚠️ Safety

⚠ Highly toxic to bees
⚠ Restrict applications when bees are foraging
⚠ Rotate with non-neonicotinoid modes of action

📋 Safety Data Sheet (SDS)

📄

Meridian 25 WG — Safety Data Sheet

The SDS document preview will appear here once the first-page image is uploaded to your server.

📎 To display the SDS preview:
1. Open the SDS PDF for this product
2. Screenshot or export page 1 as a JPG image
3. Upload to /sds/thiamethoxam-sds-page1.jpg
4. The image will display automatically here

📄 Search for this SDS on CDMS →

📄 Meridian 25 WG — 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

Thiamethoxam — Meridian, Flagship, Actara