| Static bioassay of the toxicity of dimethoate pesticide against the freshwater fish Rasbora daniconius was conducted in the laboratory. The LC 50 of values of dimethoate to the freshwater fish Rasbora daniconius at various exposure periods are 11.32, 10.69, 10.69 and 9.97 ppm for 24, 48, 72 and 96 hours respectively. From the present study it shows that the freshwater fish Rasbora daniconius is more susceptible to dimethoate toxicity as the LC 50 value for this organophosphate is less than other reported fish species. These results indicate that dimethoate to the fish caused toxic effects |