📋 Key Facts at a Glance
Chemical Class
Synthetic Pyrethroid
Signal Word
Caution (low concentration) to Warning (higher concentrations)
Residual Duration
30–90 days on treated surfaces
Target Pests
Ants, cockroaches, spiders, wasps, mosquitoes, beetles, fleas, ticks
Application Rate
Typically 0.03–0.06% final concentration
Aquatic Toxicity
HIGH — highly toxic to aquatic invertebrates, avoid near water
Bee Toxicity
High — avoid application to flowering plants when bees are active
🎯 Primary Uses in Pest Control
Lambda-cyhalothrin is used for: perimeter treatments around structures, lawn and garden pest control, indoor spot treatments, mosquito control in vegetation, and flea/tick treatments in yards. It's available in microencapsulated formulations (Demand CS) that provide extended residual through controlled release.
🛡️ Safety Summary
Lambda-cyhalothrin has low mammalian toxicity at typical use rates. It can cause mild skin tingling or paresthesia on direct contact — this is a transient effect, not a sign of toxicity. Eye irritant. Keep pets and children off treated areas until dry. Cats are sensitive to all pyrethroids — allow surfaces to dry completely before cat access.
🔬 Resistance Status
Significant resistance documented in German cockroach populations and bed bugs. For these pests, use indoxacarb-based gel baits (cockroaches) or chlorfenapyr/silica gel (bed bugs) instead. Lambda-cyhalothrin remains highly effective for ants, spiders, mosquitoes, and most other target pests.
❓ FAQ
Is lambda-cyhalothrin safe for dogs?
Lambda-cyhalothrin at labeled rates is considered safe for dogs once the treated surface is completely dry. Minimize exposure to wet spray. Larger dogs tolerate lower residual exposure better than smaller dogs. Cats are more sensitive — ensure surfaces are dry before cat access.
How long does lambda-cyhalothrin last?
Microencapsulated formulations (Demand CS) provide 30-90 days of residual activity on treated surfaces. Non-encapsulated formulations have shorter residual (2-4 weeks). UV exposure, rain, and surface type all affect residual duration.
