AMX
Active substance
ATC code
Species
Atlantic salmon (Salmo salar) and rainbow trout (Oncorhynchus mykiss).
Indications
For treatment of adult and preadult sea lice (Lepeophtheirus salmonis) on Atlantic salmon (Salmo salar) and rainbow trout (Oncorhynchus mykiss).
Dose to be administered and administration route
The delousing should be performed in a well-boat or in a sea-cage with a raised net enclosed by a tarpaulin. This is to ensure proper control of the treatment volume and the treatment dosage, in addition to reduce the amount of AMX used and the environmental exposure. Calculate the water volume as exactly as possible to ensure correct dosing.
Treatment dose: 0.2 ml AMX per m3 (1000 l) sea water in the treatment unit.
This corresponds to 2 microgram deltamethrin/litre sea water. For calculation of the treatment volume in the unit, please refer to the section below; “Treatment volume”.
Treatment period: 30 minutes
Treatment volume:
Well-boat: The dosage is calculated according to the actual volume of the treatment unit.
Tarpaulin:
The dosage is calculated according to the actual volume of the treatment unit (tarpaulin volume).
Method of administration:
The product should be brought to room temperature before use in order to flow more easily out of the bottle. Shake the bottle well before use. Calculate the volume in the treatment unit and the AMX dose. Use a suitable container and dilute the calculated quantity of AMX in seawater. Diluting the product in a large volume of seawater will ensure a better dispersion and thereby the efficacy of the treatment. After a short period of stirring, the diluted solution must be spread evenly throughout the treatment unit. It is recommended to use a pump with low or moderate pressure to further improve an even dispersion. Do not disperse under high pressure as this may cause atomising and/or foaming.
It may be necessary to repeat the treatment if reinfestation with sea lice occurs, but due to the environmental properties of the product (see section 5.3) the use of the product should be kept to a minimum. As a minimum requirement a period of at least 14 days should elapse between treatments in order to provide a protection of the environment.
Adverse reactions
The fish tend to move closer to the surface during treatment and increased restlessness and jumping frequency are observed. Occasional mortalities have also been observed after treatment with the recommended treatment regimen. Miscalculation of the treatment volume (overdosing), extended exposure period or low water temperature may increase the frequency of adverse reactions or signs of intoxication (see section 4.10 “Overdose”).