Light Dusting Principle
Applying insecticidal dusts in thin, barely visible layers - heavy dust accumulations reduce effectiveness as pests avoid them.
Detailed Overview
The single most important rule of dust applications: LIGHT dusting is effective, HEAVY dusting fails. Pests avoid visible piles of dust. Proper application: dust should be barely visible, like light coating of talcum powder. Use hand duster or electric duster to puff small amounts into voids. For attics: light coating on joists and surfaces, not deep accumulations. For wall voids: insert duster tip, puff while withdrawing to distribute evenly. For electrical outlets: one small puff, not filling void. Common mistake: applying too much dust thinking "more is better" - creates piles pests walk around. Proper coverage: insects cannot avoid contacting light dust, walk through it, groom it off and ingest it, or it adheres to body causing dehydration (desiccants). Dusts offer longest residual of any formulation - years if kept dry - but only if properly applied. Types: boric acid (stomach poison), diatomaceous earth (desiccant), silica gel (desiccant), pyrethroid dusts (contact). Application equipment matters: hand duster for small jobs, electric duster for attics/large voids provides better distribution. Mark treated areas: label electrical outlets treated with dust, document attic treatments with photos/diagrams.
When to Use
Apply light dust to wall voids, attics, crawlspaces, and other concealed areas. Use hand or electric duster. Apply thin coating barely visible. Never pile or over-apply.
Required Skill Level
Should only be performed by licensed pest management professionals
Benefits
- Longest residual of any formulation (years)
- Reaches deep into voids where liquids cannot
- Effective in dry protected locations
- Desiccants cannot be resisted
- Cost-effective long-term control
Limitations
- Light dusting principle frequently violated
- Ineffective in wet locations
- Cannot see coverage level during application
- Can create airborne particles if over-applied
- Requires proper equipment for good distribution
- May violate label if applied to non-labeled areas
Related Concepts
Other techniques that may be useful
Crack and Crevice Treatment
Pesticide application method that places insecticides directly into cracks, crevices, and voids where pests hide, minimizing exposure to people and pets.
HEPA Vacuuming
Non-chemical pest removal using High Efficiency Particulate Air (HEPA) vacuum cleaners to physically remove pests, eggs, droppings, and allergens.
Steam Cleaning
Non-chemical pest control using high-temperature steam to kill pests, eggs, and larvae on contact.