The label is the law. Read your product's label before you mix or apply; the rates here come from the labels listed under Sources.
- Active ingredient
- Imidacloprid + beta-cyfluthrin (CAS 138261-41-3 (imidacloprid); 68359-37-5 (cyfluthrin))
- Chemical class
- A neonicotinoid (imidacloprid) combined with a pyrethroid (beta-cyfluthrin).[2][3]
- Mode of action
- IRAC Group 4A + 3A: Nicotinic acetylcholine receptor competitive modulators (imidacloprid, 4A) plus sodium channel modulators (beta-cyfluthrin, 3A)[4]
- Signal word
- Temprid SC Insecticide: Caution[1]
Why two actives
Imidacloprid is a systemic neonicotinoid and beta-cyfluthrin a contact pyrethroid; both disrupt the insect nervous system and cause paralysis and death.[2][3]
They fall in different IRAC groups, 4A and 3A, so the product combines two modes of action.[4]
Bed bugs
According to the label, bed bugs contacted by the spray are killed outright and young nymphs that hatch later are killed by the dried residue.[1]
Where it is used
The label covers residual pest control indoors in and around buildings and structures and outdoors around them; in New York State it may only be applied for indoor uses.[1]
For infested mattresses, the label says to remove and wash linens, apply to tufts, seams, folds and edges until moist, and let the mattress dry before remaking the bed.[1]
Products and registrations
| Product | Registrant | EPA Reg. No. | Active % | Formulation | Signal word |
|---|---|---|---|---|---|
| Temprid SC Insecticide[1] | Bayer Environmental Science (now Envu) | 432-1483 | 31.5% | suspension concentrate | Caution |
Label rates
| Product | Use | Pests | Rate |
|---|---|---|---|
| Temprid SC Insecticide | Indoor and outdoor residual treatment of buildings and structures | Ants, cockroaches, spiders and other listed structural pests | 0.27–0.54 fl oz per gal of water[1] 0.27 fl oz/gal = 0.075% total active; 0.54 fl oz/gal = 0.15%. Use the higher rate for severe infestations, faster knockdown and longer residual. |
| Temprid SC Insecticide | Bed bugs (mattress tufts and seams, bed frames, box springs) | Bed bugs | 0.27 fl oz per gal of water[1] For bed bugs do not exceed 0.075% (0.27 fl oz per gallon). |
How to apply it, step by step
1. Protective gear
- Wear a long-sleeved shirt, long pants, socks, shoes and gloves: it is harmful if swallowed or absorbed through the skin and causes moderate eye irritation. Wash contaminated clothing before reuse and wash with soap and water after handling.[1]
2. Before you spray
- It is extremely toxic to fish, wildlife and aquatic invertebrates and highly toxic to bees: keep it away from ornamental ponds, don't let it drift onto blooming plants bees are visiting, and keep it out of drains and gutters.[1]
- Indoors, it is for spot and crack-and-crevice treatment only: never broadcast over floors, use as a space spray, or spray furniture people sit on for long periods or bed linens.[1]
- Don't spray where electrical short circuits can occur (use a dust or bait there). In New York State it may only be used indoors.[1]
3. Mixing
- Shake well. Mix 0.27 fl oz (8 mL) per gallon of water for 0.075%, the indoor rate, or 0.54 fl oz (16 mL) for 0.15%; always use 0.15% for fire ants, hornets, wasps and yellowjackets.[1]
- Add it while filling the sprayer with water; leftover mix can be kept overnight if agitated again before use.[1]
4. Applying
- Indoors, use a coarse, low-pressure spray (50 psi or less) on entry points, baseboards, corners, around pipes, and under refrigerators, cabinets, sinks and stoves; spot-treat floors under furniture and in closets, but never the whole floor.[1]
- For bed bugs, spray bugs and eggs directly; dampen mattress tufts, seams, folds and edges (with linens removed), and treat box springs, bed frames, headboards, baseboards, moldings and the seams of empty luggage.[1]
- Outdoors, treat walls up to 2 to 3 feet, around doors, windows and soffits, and a band of soil, turf or non-flowering ground cover up to 10 feet out, at 8 to 16 mL per 1,000 sq ft.[1]
- Repeat every 7 to 10 days if needed, using no more than 5 gallons of mix indoors per person per day and 32 fl oz of concentrate per acre per year.[1]
5. After you spray
- People and pets can go back in once treated surfaces are dry; let mattresses dry before remaking the bed.[1]
- Rinse equipment over the treated area so rinse water doesn't run into drains.[1]
First aid
- On skin, take off contaminated clothing and rinse for 15 to 20 minutes; in the eyes, rinse gently for 15 to 20 minutes, removing contact lenses after the first 5.[1]
- If swallowed, call a poison control center or doctor right away, have the person sip water if they can swallow, and don't induce vomiting unless told to; the label's 24-hour line is 1-800-334-7577.[1]
Storage, spills and disposal
- Mix only what you need, and store the concentrate in its original container in a secure, dry place away from temperature extremes and other pesticides and fertilizers.[1]
- Soak up any spill with sawdust or another absorbent, sweep it up and dispose of it as chemical waste.[1]
From the safety data sheet
- The concentrate is a white to beige liquid suspension with a characteristic odor and a flash point above 200 degrees Fahrenheit (93.3 degrees Celsius); dangerous gases are given off if it burns.[5]
- Store it in the original container in a cool, dry place, away from other pesticides, fertilizers, food and feed and out of children's reach, preferably locked up.[5]
- Soak up spills with an inert absorbent such as sand or sawdust, seal the waste in a labeled, closed container, and keep spills out of soil, waterways and drains; never pour unused product down any drain.[5]
- It is harmful if absorbed through the skin, may slightly irritate skin and moderately irritates eyes.[5]
- The beta-cyfluthrin in it is extremely toxic to fish and water fleas, and drift or runoff can harm aquatic life; don't let rinse water reach surface or ground water, and keep it off blooming plants that bees are visiting.[5]
Safety and environmental hazards
People
The label signal word is CAUTION: harmful if absorbed through skin or swallowed and causes moderate eye irritation; applicators must wear long sleeves, long pants, socks, shoes and gloves.[1]
Pets
The label says not to contact treated surfaces until dry, and that people and pets may re-enter once the treated area is dry; take care to avoid fish and reptile pets around ornamental ponds.[1]
Bees and pollinators
The label states it is highly toxic to bees exposed to direct treatment or residues on blooming plants or weeds; do not apply or let it drift to blooming plants while bees are foraging.[1]
Fish and water
The label states it is extremely toxic to wildlife, fish and aquatic invertebrates, and that drift and runoff may harm aquatic organisms nearby.[1]
Common questions
Sources
- U.S. EPA Pesticide Product Label System, “Temprid SC Insecticide label, EPA Reg. No. 432-1483 (EPA-stamped, July 8, 2015).” www3.epa.gov/pesticides/chem_search/ppls/000432-01483-20150708.pdf (accessed 2026-10-06)
- University of California Statewide IPM Program, “Home and Landscape Pesticide Active Ingredients Database: imidacloprid.” ipm.ucanr.edu/home-and-landscape/pesticide-active-ingredients-database/active-ingredient-details/?uaiKey=22 (accessed 2026-10-06)
- University of California Statewide IPM Program, “Home and Landscape Pesticide Active Ingredients Database: beta-cyfluthrin.” ipm.ucanr.edu/home-and-landscape/pesticide-active-ingredients-database/active-ingredient-details/?uaiKey=100 (accessed 2026-10-06)
- Insecticide Resistance Action Committee, “IRAC Mode of Action Classification Scheme, Version 11.5 (Feb. 2026).” irac-online.org/documents/moa-classification/ (accessed 2026-10-06)
- Bayer Environmental Science, “Temprid SC Insecticide Safety Data Sheet (Bayer Environmental Science, revised January 11, 2017; copy hosted by distributor Industrial Fumigant Co.).” label.indfumco.com/%5Cfiles_techservices%5Clive%5Cbayer.tempridsc011117.sds.PDF (accessed 2026-10-16)