MAC value doses for the use of Diuron herbicide on Daphnia magna survival

The effect of the phenyl urea herbicide Diuron on mortality rate of Daphnia magna was investigated. The study was conducted in 10 treatments and one control in 3 repeats. After application During 24h. Ec10 , Ec50, Ec90 values and MAC value were determined .Results showed these values of the herbicide ranged 15.96 mg/l,26.43 mg/l,43.74 mg/l,2.643 mg/l respectively. According to statistical analysis, the correlation between Probit value and logarithm of concentration at 0.01 is significant . The Diuron  thus, toxic level for Daphnia magna is estimated average Based on the results. It seems that using Diuron in the fish culturing pools, should be about 2.643 mg/l not to decrease or eliminate the microorganisms which are a suitable food for fish.