Figure 2
From: Predicting the aquatic toxicity of commercial pesticide mixtures
Frequency distribution of model distribution ratios (MDR) for "most similar endpoints." MDR was calculated from non-censored EC50 values of the four endpoints Daphnia and fish acute toxicity as well as algal and Lemna growth inhibition (total n = 274) based on the data set compiling endpoints for the individual compounds as similar as possible to those used for the products. Black (lower part of the columns) represents products containing active substances with similar and white those with at least two active substances with dissimilar pesticidal modes of action. MDR values smaller than 1 indicate that the product is less and MDR values greater than 1 indicate that the product is more toxic than predicted by concentration addition, respectively.