new organophosphorus pesticides Azamethiphos 

The high quality one can be used kill Caligus and sea lice, but no harm for Salmon and water, can used in fresh water and sea water. The low quality one are harm for Salmon, only used to kill fly, ants, cockroach and so on. Azamethiphos is an organophosphorus insecticide which acts by inhibition of cholinesterase activity. In verterinary medicine, it is used in fish farming to control external parasites of the atlantic salmon. The application rate for this use is 0.1 to 0.2 mg/L as a bath treatment.