Deltamethrin

📋 Key Facts at a Glance

Chemical Class

Synthetic Pyrethroid

Signal Word

Caution

Residual Duration

6+ months as dust; 30-60 days as liquid

Primary Products

Delta Dust (dust), Suspend SC (liquid), Suspend Polyzone

Key Application

Wall void dusting, attic treatments, outdoor perimeter

Aquatic Toxicity

Very high — keep away from water

Moisture Stability

Delta Dust is moisture-resistant — maintains efficacy in damp areas

🎯 Primary Uses in Pest Control

Deltamethrin liquid (Suspend SC) is used for perimeter treatments, indoor crack and crevice, and surface sprays. Delta Dust is used primarily for: wall void treatments (via drill holes or outlet plates), attic treatments for overwintering insects, crawl space treatments, and harborage areas where liquid application is impractical. Delta Dust is particularly valued for treating wall voids that harbored yellow jackets, stink bugs, or roaches.

🛡️ Safety Summary

Very low mammalian toxicity at application rates. Skin tingling (paresthesia) on contact — transient, not a sign of systemic toxicity. Wear gloves and avoid inhaling dust during application. Respiratory protection (N95) recommended when dusting in enclosed spaces. Toxic to cats — ensure dry before cat access.

🔬 Resistance Status

Resistance documented in German cockroaches and bed bugs — similar profile to other pyrethroids. Delta Dust is still highly effective for ants, yellow jackets, cluster flies, stink bugs, and most other target pests in wall voids.

🏷️ Common Products Containing Deltamethrin

Delta DustSuspend SCSuspend PolyzoneCyzmic CS

❓ FAQ

What is Delta Dust used for?

Delta Dust is primarily used for treating wall voids, attic spaces, and crawl spaces where liquid sprays are impractical. It's particularly effective for yellow jacket nests in wall voids, cluster fly overwintering sites, cockroach infestations behind walls, and ants in structural voids.

Is Delta Dust safe to use indoors?

Delta Dust is designed for crack-and-crevice and void applications, not broadcast surface application. Apply thin layers inside voids, not on open surfaces. The concentration is very low and the dust stays where applied. Follow label requirements for indoor use.

Deltamethrin Insecticide Profile