Abstract
Dichlorvos is an organophosphate basically used as a contact for foods and non- food crop pest. It is a pesticide which is said to be very toxic to fish and other aquatic organisms, the trade names are known as sniper, Vapona, Nuvan and compound name is DDVP Odimethyl-0-2, 2-dichloro-vinyl phosphate. Experimental studies were carried out to determine at what level is the dichlorvos lethal to the juvenile fish. Experimental studies were performed on healthy Claria gariepinus juveniles, the fish were exposed to dichlorvos in concentration 1.0, 1.4, 1.8, 2.2 and 2.6ml. Response exhibited by Clarias. gariepinus juveniles subjected to the toxicant included unbalanced and sudden jerky swimming motions, air gulping and surfacing, the conclusion deduced from the result is that dichlorvos at all of level of concentration is toxic to fish.
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