What is imidacloprid? An active ingredient from the neonicotinoid group. It acts on the insect's nerves differently from pyrethroids, so it works on insects that have become resistant to ordinary sprays. In homes its best-known use is against bed bugs, combined with a second substance; in agriculture it is used on sucking insects such as aphids and whiteflies.
How does it work?
- It enters by contact and feeding.
- It binds to nerve receptors in the insect and keeps them firing.
- The insect stops feeding and moving, then dies.
- It does not repel, so insects walk over it unaware.
Why is it combined with another substance for bed bugs?
Bed bugs in many places now resist pyrethroids used alone. When two substances each hit a different point in the nerves:
- The pyrethroid gives a fast knockdown.
- Imidacloprid kills those that survive the first hit.
- The effect stays in cracks for weeks and catches those that hatch later.
Its uses
| Field | Insects | How it is used |
|---|---|---|
| Homes | Bed bugs | Sprayed on cracks, bed frames and wall bases |
| Homes | Cockroaches and flies | Inside some baits |
| Agriculture | Aphids, whiteflies and thrips | Foliar spray or through irrigation |
| Buildings | Termites | Soil treatment |
In plants: systemic
The plant absorbs it through roots or leaves and spreads it in the sap. Sucking insects take it in with the sap and die, even if the spray never touched them.
Where to apply it for bed bugs
- Seams and frame of a wooden bed.
- Wall cracks, and behind pictures and sockets.
- The base of walls around the bed.
- Sofas, underneath and along seams.
- Follow the label for the mattress itself, and rely on steam and a cover there.
When do results show?
- Those touched directly die within hours.
- The rest die when they leave shelter and cross the surface.
- Re-treat after two weeks for newly hatched eggs.
Safety
- Toxic to bees: do not spray flowering plants or while bees are active.
- Observe the pre-harvest interval on crops.
- Air the room and let it dry before sleeping in it.
- Wear gloves and a mask.
Products from Orkida
- POLTI Italian steam cleaner for mattresses
- Professional bed bug control kit
- Economy bed bug control kit
Imidacloprid FAQs
Does imidacloprid smell?
Very little in suspension formulations.
Is it enough alone for bed bugs?
It is best combined with a pyrethroid, along with steam, hot washing and a mattress cover.
Is it the same substance used in agricultural insecticides?
Yes, the same substance, but the strength, formulation and label differ. Use a public health product at home and an agricultural product on plants.