⚖️ 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
Mosquito Dunks — Summit Chemical — consumer donut-shaped
Mosquito Bits — Summit Chemical — consumer granular
VectoBac WDG — Valent BioSciences — professional
Gnatrol WDG — Valent — fungus gnat specific
🎯 What It Kills
✓ Mosquito larvae✓ Fungus Gnat larvae✓ Black Fly larvae✓ Midge larvae
⚙️ How It Works
Bti produces Cry4 and Cry11 proteins active against mosquito and gnat larvae specifically — not caterpillars. Completely safe for fish, frogs, birds, and beneficial insects.
⚗️ Mixing & Application
Mosquito Dunks: 1 dunk per 100 sq ft of water. Replace monthly. Mosquito Bits: soak in water overnight, use strained water to drench soil for fungus gnats.
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
- ⚠ EXTREMELY safe — no toxicity to fish, birds, or beneficial insects at any practical use rate
- ⚠ Safe in fish ponds, bird baths, and pet water dishes
- ⚠ Must contact larvae in water — no residual on dry surfaces
🐛 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
🔸
Re-entry: Immediate
Keep people and pets out of treated area
🟢
Effective period: Up to 30 days per dunk
Active residual — killing or repelling target pests
🔄
Reapply
Re-treat when pest activity returns or residual expires
🔄 Alternatives & Related Products
Same chemical class or different approaches to the same pests.
🔄Bt Kurstaki
Same class: Microbial
↔️Same class: Microbial
Pyrethrin
Different approach: Botanical Pyrethrin
↔️Different approach: Botanical Pyrethrin
Boric Acid
Different approach: Inorganic
Different approach: Inorganic
❓ Frequently Asked Questions
Q: Is bt israelensis 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 bt israelensis indoors?
Check the specific product label — formulations vary. Baits and dusts often have indoor labeling; concentrates and granulars are typically outdoor.
Q: How long does bt israelensis 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)
Mosquito Dunks — 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.