EFFECT OF AGRICULTURAL PESTICIDE (CYPERMETHRIN) ON Labeo rohita

The effect of cypermethrin pesticide on juvenile rohu (Labeo rohita) was determined in captive condition. Live and healthy (average initial weight 21g) were exposed to five concentrations Cypermethrin 0.63, 0.13, 0.025, 0.005, 0.001 ppm one control group (no pesticide) with two replications for each treatment. mean temperature pH the experimental tanks 27.53±0.41ºC 7.22±0.013 ppt, respectively. highest growth recorded tank 0.2g per week, where as nosignificant growths found 0.005 concentration. Rohu reared 0.13 had lowest growth. median lethal concentration values at 9th, 17th 20th day, Behavioral patterns observed both sub 0.025 ppm. L. rohita toxic media exhibited erratic darting movements imbalanced swimming activity, which might be due malfunctioning neurotransmitters, followed by hyper hypo opercula loss equilibrium mucus secretion all over body