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. 2008 Nov 14;117(3):348–353. doi: 10.1289/ehp.0800096

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Degree of AChE inhibition in the response to binary combinations of OP and CB pesticides. (A ) 10% (0.1 EC₅₀). (B) 29% (0.4 EC₅₀). (C) 50% (1.0 EC₅₀). OP–OP pairings tended to be more synergistic than other pairings, producing 100% mortality (M) at concentrations that were sublethal in single pesticide exposures. The number of combinations that were statistically synergistic (t-test with Bonferroni correction, denoted by asterisks) increased with increasing exposure concentrations. Bars are means (n = 8), and error bars indicate the 95% CIs of the mean.