Synergistic effect of organophoshate chlorpyrifos and synthetic pyrethroid cypermethrin in freshwater commercially cultivable fish Labeo rohita

In the present study freshwater commercially cultivable Indian major carp Labeo rohita fingerlings was used to evaluate the synergistic effect of chlorpyrifos, an organophosphate insecticide and cypermethrin , a synthetic pyrethroid insecticide widely used in agricultural fields. The fishes were maintained at sublethal concentration for a period of 14 and 21 days. Histological examination was carried out in gills, liver and muscle at the end of exposure period to study the extent of damage at safe concentration.