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Tri-Die® Silica + Pyrethrum Dust

BASF · Piperonyl butoxide 10%; Pyrethrins 1%; Silica gel 40% · EPA Reg 499-429 · INSECTICIDE; MITICIDE Document last checked 2025-03-21

About this product

Active ingredient Piperonyl butoxide 10%; Pyrethrins 1%; Silica gel 40%
Manufacturer BASF
Category INSECTICIDE; MITICIDE

Full details for Tri-Die® Silica + Pyrethrum Dust

Source product label ↗ Open the catalog source label while the local copy is reviewed. Verify the product name, EPA registration number, and revision before use. Source safety data sheet ↗ Open the catalog source SDS while the local copy is reviewed. Verify the exact product and revision before relying on it. EPA registration data Reg. 499-429 — registry reference, signal word and status.

Applicator discussion

Nothing here is label direction — the label is the law. These are notes from other applicators, moderated before they appear. Check the labeling accompanying the product and applicable state requirements.

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According to the label From the product label

These details were extracted from this product's label PDF. The label is the law. Confirm every rate, site, restriction and safety requirement against the label before mixing or applying. Check for a state supplemental label; a product may be restricted or prohibited in a state or site even when a rate appears below. · EPA registration data for Reg. 499-429 →

Tri Die Silica Pyrethrum Dust is a dust formulation containing silica and pyrethrum. It controls various crawling insects including ants, cockroaches, scorpions, and silverfish, as well as stored product pests, fleas, lice, ticks, bed bugs, carpenter ants, and certain bees, wasps, termites, and beetles. Apply a small amount of product into cracks, crevices, voids, or insect tunnels, and use a hand duster or rotary duster to inject the dust into wall voids or galleries.

Pests covered (48)
Crawling Insects (such as Ants, Booklice, Carpet Beetles, Cockroaches, Crickets, Firebrats, Scorpions, Silverfish and Spiders)Stored Product Pests (adult and larval stages of Cadelles, Cheese Mites, Cigarette Beetles, Confused Flour Beetles, Dark Mealworms, Drugstore Beetles, Grain Mites, Granary Weevils, Red Flour Beetles, Rice Weevils, Sawtoothed Grain Beetles and Yellow Mealworms)Fleas, Lice and TicksCarpenter AntsBed BugsBoxelder Bugs, Clover Mites, Cluster Flies and Elmleaf BeetlesDrywood Termites, Powder Post BeetlesBees and Wasps (in Ground or Voids)PILLBUGSSOWBUGSCENTIPEDESMILLIPEDESSCORPIONSSPIDERSTICKSGRAIN MITECHEESE MITECARPET BEETLEELM LEAF BEETLESAWTOOTHED GRAIN BEETLEYELLOW MEALWORMDARK MEALWORMRED FLOUR BEETLECONFUSED FLOUR BEETLECADELLECLUSTER FLYEARWIGSDRYWOOD TERMITESBEESWASPSANTSBED BUGBOXELDER BUGBOOKLOUSEFLEASFIREBRATSILVERFISHPOWDERPOST BEETLESCIGARETTE BEETLEDRUGSTORE BEETLEGROUND BEETLESRICE WEEVILGRAIN WEEVILSCOCKROACHESCRICKETSCLOVER MITECRAWLING INSECTSLICE
Areas treatable (55)
cracks, crevices and/or voids and other places where these insects travel or harbor; underneath and behind stairs, refrigerators and appliances; on, around and behind moldings, shelving, baseboards, pipe openings, cracks, crevices, and other areas where insects hidebehind cabinets and walls, in crawl spaces and atticsmills, elevators and granaries; floors, walls and other surfaces in bins, storage and handling areas; cracks, crevices and/or voids in pantries and other infested, difficult to reach areas within the structureall areas these pests may inhabit, including pet bedding, floor and floor coverings; all cracks, crevices and/or voids, such as behind moldings, shelving, baseboards and pipe openingsinsect tunnels and cavities, and void areas; points of entry or exit, such as cracks, crevices and/or voids around doors, windows and sidingjoints and channels; interior framework of hollow tubing; mattresses (especially tufts, folds, and edges); picture frame moldings and all cracks, crevices and/or voidscracks, crevices and/or voids where these insects may harbor or hibernate, such as behind siding, around window and door frames, and wall voidsinsect entry points, such as crawl holes into attics and crawl spaces of buildingsnest, nest entrance, and surrounding areas where insects alight; wall voidsGRAIN MILL EQUIPMENTGRAIN MILLS (INDOOR INEDIBLE)STORED FOOD PRODUCTSGRAIN PRODUCTS (TRANSPORTATION VEHICLES)HOSPITALS (INDOOR INEDIBLE)HOSPITALS (OUTDOOR INEDIBLE)WAREHOUSES (INDOOR INEDIBLE)WAREHOUSES (OUTDOOR INEDIBLE)MEAT PROCESSING PLANTS (RESIDUAL CRACK AND CREVICE TREATMENT)POULTRY PROCESSING PLANT (RESIDUAL CRACK/CREVICE TREATMENT)AIRCRAFT (NONFEED/NONFOOD) (RESIDUAL GENERAL TREATMENT)BUSES (NONFEED/NONFOOD) (RESIDUAL GENERAL TREATMENT)BOATS/SHIPS (RESIDUAL GENERAL TREATMENT)RAILROAD BOXCARS (FEED/FOOD-EMPTY) (RESIDUAL GENERAL TREATMENT)CAMP SITESWOOD SURFACESFOOD PROCESSING PLANTS (OUTDOOR INEDIBLE)FOOD PROCESSING PLANTS (RESIDUAL CRACK AND CREVICE TREATMENT)DOMESTIC DWELLINGS (INDOOR)STORAGE AREAS (HOUSEHOLD) (INDOOR)DOMESTIC DWELLINGS (OUTDOOR)RESORTSCAMP AREAS (FOLIAR TREATMENT)SHELVINGHOTELS/MOTELS/TOURIST COURTS (OUTDOOR)HOTELS/MOTELS/TOURIST COURTS (NON-FOOD AREAS)RUGS/CARPETSTERRESTRIAL STRUCTURES (SOIL CONTACT NONFUMIGATION TREATMENT)STORAGE AREAS (OUTDOOR)COMMERCIAL/INSTITUTIONAL/INDUSTRIAL BUILDINGS (OUTDOOR INEDIBLE)FOOD MARKETING/STORAGE/DISTRIBUTION FACILITIES (OUTDOOR INEDIBLE)FOOD MARKETING/STORAGE/DISTRIBUTION FACILITIES (RESIDUAL CRACK AND CREVICE TREATMENT)GRAIN BINS (FEED/FOOD-EMPTY) (RESIDUAL GENERAL TREATMENT)GRAIN ELEVATORS (EMPTY) (RESIDUAL GENERAL TREATMENT)COMMERCIAL/INSTITUTIONAL/INDUSTRIAL BUILDINGS (INDOOR INEDIBLE)SEWER MANHOLE COVERSRESTAURANTS (INDOOR INEDIBLE)RESTAURANTS (OUTDOOR INEDIBLE)EATING ESTABLISHMENTS (OUTDOOR INEDIBLE)EATING ESTABLISHMENTS (RESIDUAL CRACK AND CREVICE TREATMENT)MATTRESSESHUMAN BEDDINGFOOD STORAGE AREAS (PANTRIES)PET BEDDINGPET SLEEPING QUARTERSTRUCKS (FEED/FOOD-EMPTY) (RESIDUAL GENERAL TREATMENT)

How to treat each type of area 9

cracks, crevices and/or voids and other places where these insects travel or harbor; underneath and behind stairs, refrigerators and appliances; on, around and behind moldings, shelving, baseboards, pipe openings, cracks, crevices, and other areas where insects hide

Target pest Location Rate Unit Label notes
Crawling Insects (such as Ants, Booklice, Carpet Beetles, Cockroaches, Crickets, Firebrats, Scorpions, Silverfish and Spiders) Indoor 1 oz/ 50 ft2 oz/ft2 Apply a small amount of product

behind cabinets and walls, in crawl spaces and attics

severe
Target pest Location Rate Unit
Crawling Insects (such as Ants, Booklice, Carpet Beetles, Cockroaches, Crickets, Firebrats, Scorpions, Silverfish and Spiders) Indoor 1 lb/1,000 ft2 lb/ft2

mills, elevators and granaries; floors, walls and other surfaces in bins, storage and handling areas; cracks, crevices and/or voids in pantries and other infested, difficult to reach areas within the structure

clean up waste materials, dust, dirt, and other debris

Target pest
Stored Product Pests (adult and larval stages of Cadelles, Cheese Mites, Cigarette Beetles, Confused Flour Beetles, Dark Mealworms, Drugstore Beetles, Grain Mites, Granary Weevils, Red Flour Beetles, Rice Weevils, Sawtoothed Grain Beetles and Yellow Mealworms)
Location
Indoor

all areas these pests may inhabit, including pet bedding, floor and floor coverings; all cracks, crevices and/or voids, such as behind moldings, shelving, baseboards and pipe openings

Target pest
Fleas, Lice and Ticks
Location
Indoor

insect tunnels and cavities, and void areas; points of entry or exit, such as cracks, crevices and/or voids around doors, windows and siding

Locate source of infestation or areas of suspected activity

Target pest
Carpenter Ants
Location
Both

joints and channels; interior framework of hollow tubing; mattresses (especially tufts, folds, and edges); picture frame moldings and all cracks, crevices and/or voids

Take bed apart. Cover mattresses with clean bedding before use.

Target pest
Bed Bugs
Location
Indoor

cracks, crevices and/or voids where these insects may harbor or hibernate, such as behind siding, around window and door frames, and wall voids

Inject into cracks, crevices and/or voids

Target pest
Boxelder Bugs, Clover Mites, Cluster Flies and Elmleaf Beetles
Location
Both

insect entry points, such as crawl holes into attics and crawl spaces of buildings

Target pest Location Rate Unit Label notes
Drywood Termites, Powder Post Beetles Both 1 lb/1,000 ft2 lb/ft2 Use an electric or hand-operated rotary duster. Close all vents and blowers on the windward side so that all wood surfaces can be treated. In case of localized infestations, probe to locate galleries and drill holes to inject this product into the galleries and void areas. If a heavy infestation has developed, fumigation should be employed.

nest, nest entrance, and surrounding areas where insects alight; wall voids

If practical, treat wasp and bee nests in the evening when insects are less active and have returned to the nest. Using a hand duster, or other suitable means, with extension tubes if necessary. If necessary, drill a hole. Apply dust through the hole, into the void, then reseal. Check nests 1 to 2 days after treatment to ensure total kill.

Target pest
Bees and Wasps (in Ground or Voids)
Location
Both

Timing & weather

Use restrictions 4