Pyrethroid mechanism of action diagram

How pyrethroid works — illustrated mechanism of action · PestControlBasics.com

Natural/Organic CAUTION 🌿 OMRI Organic

Pyrethrin — PyGanic, Evergreen

Active ingredient: pyrethrin  ·  Residual: Hours only

⚠️ Don't buy duplicates. All brands listed contain the same active ingredient. Buying two different brands is buying the same pesticide twice.
⚖️ 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

PyGanic EC 1.4 — MGK — OMRI-listed organic concentrate
PyGanic EC 5.0 — MGK — higher concentration commercial
Evergreen EC 60-6 — MGK — pyrethrin + PBO synergist
Riptide — PBI Gordon — ULV combination

🎯 What It Kills

✓ Aphids✓ Thrips✓ Whiteflies✓ Caterpillars✓ Beetles✓ Flies✓ Mosquitoes✓ Mites

⚙️ How It Works

Pyrethrin is extracted from Chrysanthemum flowers. Extremely fast knockdown but breaks down within hours in sunlight — no residual. OMRI-listed for certified organic production.

⚗️ Mixing & Application

PyGanic EC 1.4: 4.5–18 fl oz per gallon. For 4-gallon backpack: 18–72 fl oz at low rate. Apply in early morning or evening — breaks down rapidly in UV.
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.
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⚠️ Safety

  • ⚠ Still toxic to bees when wet — apply evening only
  • ⚠ Toxic to fish
  • ⚠ Very short residual — frequent reapplication needed
  • ⚠ PBO synergist in some formulations not accepted by all organic certifiers

🐛 Pests This Treats — Learn More

Click any pest to view its full identification guide, biology, and treatment options.

🐛 Aphid → 🐛 Caterpillar → 🐛 Flies → 🐛 Mites → 🐛 Mosquito → 🐛 Scales → 🐛 Thrips → 🐛 Ticks → 🐛 Whiteflies →

🌿 Environmental & Ecological Impact

🐝 Bees / PollinatorsHIGH
🐟 Fish / Aquatic LifeVERY HIGH
🐦 BirdsLOW
🐕 Mammals / PetsLOW
🦐 Aquatic InvertebratesVERY HIGH
💡 Natural but highly toxic to aquatic life and bees. Breaks down rapidly in sunlight (hours). Short environmental persistence.

⏱️ Residual & Re-entry Timeline

🔹
Apply
Follow label mixing and application rates
🔸
Re-entry: 2–4 hours (until dry)
Keep people and pets out of treated area
🟢
Effective period: Hours only
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.

🔄
Azadirachtin
Same class: Botanical
↔️
Boric Acid
Different approach: Inorganic
↔️
Methoprene
Different approach: IGR

❓ Frequently Asked Questions

Q: Is pyrethrin 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 pyrethrin 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 pyrethrin 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)

📋

PyGanic EC 1.4 — Safety Data Sheet

View the official SDS document for this product directly on the CDMS label database.

PyGanic EC 1.4 Safety Data Sheet page 1
📄 PyGanic EC 1.4 — Safety Data Sheet · View the complete SDS document above or download below
📚 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.