The development of pyrethrum-based treatments against the ectoparasitic salmon liceLepeophtheirus salmonisin sea cage rearing of atlantic salmonSalmo salarL.

• DOI: 10.1046/j.1365-2109.2001.00605.x
• Publication Date: 2003-03-11T04:13:25Z
• Authors: Karin Boxaspen; Jens Christian Holm
• Keywords: Lepeophtheirus; Cage; Pyrethrum

Motile salmon lice Lepeophtheirus salmonis were successfully removed by an oil-based pyrethrum treatment mixture. The experiments described here are all based on skin exposure of the Salmo salar L. in-cage method, in which would delouse themselves jumping through a layer mixture, gave up to 86.9% delousing effect under low levels solar radiation (October). However, at higher (May), comparable decreased 31.8%. Studies time vs. showed no difference between 2-s and 10-s overall 89.5%. Individual procedures have thus been developed with 4- 6-s dip A commercial method is Py-Sal 25 mixed anaesthetic bath before vaccination or sorting operation. efficiency this large-scale was 85%. This now used as active component.