⚖️ 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
Amdro Fire Ant Bait — Ambrands — consumer broadcast bait
Amdro Pro — Ambrands — professional version
Siege — BASF — professional cockroach gel bait
Maxforce Granular — Bayer — broad-spectrum granular
🎯 What It Kills
✓ Fire Ants✓ Harvester Ants✓ Big-Headed Ants✓ Cockroaches (Siege gel)
⚙️ How It Works
Hydramethylnon is a metabolic inhibitor in fire ant baits. Workers carry bait to queen — colony collapse within 1–2 weeks. The most widely used fire ant bait active ingredient.
⚗️ Mixing & Application
Amdro Fire Ant Bait: broadcast at 1–1.5 lb per acre, OR 3–5 tablespoons around individual mounds. Apply when ants are actively foraging (soil 65–85°F). Do NOT water in.
Example
0.5 oz
per gallon
⚗️ Mixing Calculator
Enter your sprayer size and target rate — get the exact amount to pour. Backpack, hand sprayer, hose-end, or skid unit.
⚠️ Safety
- ⚠ Apply only when ants are actively foraging
- ⚠ Toxic to fish
- ⚠ Apply in dry weather — moisture degrades bait
- ⚠ Best in early morning or evening when ants are most active
🐛 Pests This Treats — Learn More
Click any pest to view its full identification guide, biology, and treatment options.
🌿 Environmental & Ecological Impact
⏱️ Residual & Re-entry Timeline
🔹
Apply
Follow label mixing and application rates
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Re-entry: Avoid contact with bait
Keep people and pets out of treated area
🟢
Effective period: Bait: use immediately
Active residual — killing or repelling target pests
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Reapply
Re-treat when pest activity returns or residual expires
🔄 Alternatives & Related Products
Same chemical class or different approaches to the same pests.
↔️Pyrethrin
Different approach: Botanical Pyrethrin
↔️Different approach: Botanical Pyrethrin
Boric Acid
Different approach: Inorganic
Different approach: Inorganic
❓ Frequently Asked Questions
Q: Is hydramethylnon safe for pets?
Follow the product label. Keep pets out of treated areas until completely dried (2–4 hours for sprays). Once dry, treated surfaces pose minimal risk to dogs and cats.
Q: Can I use hydramethylnon indoors?
Yes — Hydramethylnon is commonly used indoors in bait and dust formulations. Apply in cracks, crevices, and voids away from food surfaces.
Q: How long does hydramethylnon last after application?
Residual varies by formulation, surface type, weather, and UV exposure. Indoor applications last longer than outdoor. Check the product label for re-application intervals.
Q: What should I do if exposed?
Remove contaminated clothing, wash skin with soap and water. For eye contact, rinse 15–20 minutes. For ingestion or severe symptoms, call Poison Control (1-800-222-1222). Have the product label available.
📋 Safety Data Sheet (SDS)
Amdro Fire Ant Bait — Safety Data Sheet
View the official SDS document for this product directly on the CDMS label database.
📚 Sources: EPA Pesticide Labels · NPIC Pesticide Info
Published: Jan 1, 2025 · Updated: Apr 7, 2026
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Reviewed by Derek GiordanoContent reviewed by a licensed pest management professional and cross-referenced against EPA, university extension, and manufacturer technical data. Last reviewed: April 2026.