What is cyromazine? An insect growth regulator specialised for fly larvae. It does not kill flying flies; it works on maggots before they become flies: it disrupts their moulting so they die without completing development. It is applied at breeding sites such as manure and waste.
How does it work?
A fly larva grows by shedding its skin several times, then becomes a pupa, then a fly.
Cyromazine upsets that process:
- The larva cannot form a sound new skin.
- It becomes deformed and dies before becoming a pupa or fly.
- Adult flies are not affected.
Why treat larvae at all?
The flies you see are a small part of the problem. Most of the population is maggots at breeding sites, producing new flies every day.
- Spraying flying flies kills what is present; tomorrow more emerge.
- Treating larvae cuts off the source.
- Both together is the solution.
Where is it applied?
- Poultry and livestock houses: on manure and litter.
- Waste collection points and organic refuse.
- Compost and manure heaps.
- Any moist spot with organic matter where you see maggots.
Application methods
| Method | When |
|---|---|
| Dry scatter | Manure and waste that is already moist |
| Dissolved and sprayed | Dry sites or when better distribution is needed |
| Dissolved and poured | Small areas and specific spots |
The amount per square metre comes from the label.
When do you see results?
Not on day one. Existing adult flies live out their lives.
- One to two weeks: fly numbers start falling, because no new generation emerges.
- In a hurry? Use a fly bait or adulticide alongside it in the same period.
Rotate; do not rely on it alone
- Flies can develop resistance if it is used alone year after year.
- Alternate with a larvicide from another family.
- Remove manure and waste promptly; this takes pressure off the product.
Safety
- Keep away from feed and drinking water.
- Gloves and a mask when scattering or spraying.
- Wash your hands after use.
Products from Orkida
Cyromazine FAQs
Does cyromazine kill flying flies?
No, it is for larvae only. Adult flies need a bait or another insecticide.
Does it work on mosquito larvae?
It is specialised for flies. Mosquito larvae have their own larvicides applied to water.
How often should I repeat it?
As the label says and as manure and waste build up. New manure is not covered by an earlier treatment.