TOPICAL PESTICIDE COMPOSITIONS COMPRISING AZAMETHIPHOS AND EITHER CYPERMETHRIN OR DELTAMETHRIN TO COMBAT ECTOPARASITES ON FISH

摘要

The present invention provides a method of pesticidal treatment of vertebrateaquatic animals, in particular fish,which method comprises applying to said aquatic animals, typically topicallyor, more preferably, by administration into water inwhich said aquatic animals are contained, a topical pesticidal compositioncomprising a pyrethroid and an organophosphatebiocide in a weight ratio of 1 :20 to 10:1, particularly 1 : 10 to 5: 1,especially 1 :3 to 3: 1.