Acute Toxicity of Glyphosate and Propanil on Clarias gariepinus Juveniles

The impact of short term exposure to the commonly used herbicides, glyphosate and propanil on Clarias gariepinus juveniles was evaluated using standard methods that assessed fish behavior and mortality. Fish exhibited some behavioral abnormalities such as hyperactivity, hitting of tails against the walls of the holding medium and abnormal swimming. The herbicides caused mortality of fish in a concentration dependent manner for the duration of exposure to acute concentrations of both herbicides for 96 hrs. However, the LC50 value for glyphosate by probit method/analyses was 2.09 mg/L while that of propanil was 4.57 mg/L, hence glyphosate was more toxic than propanil.