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Table 4 NOEC, LOEC, EC50, and EC10 values of the atrazine tests regarding photosynthesis

From: Impact of heterophylly on the sensitivity of Myriophyllum aquaticum biotests

Adaptation time to the submerged state (quantum yield of PSII) NOEC (μg a.i./L) LOEC (μg a.i./L) EC50 (95% confidence interval) (μg a.i./L) EC10 (95% confidence interval) (μg a.i./L)
no <10 10 135.1 (69.1 to 264.3) 5.5 (1.0 to 30.9)
7 days <10 10 386 (99.9 to 1,493) 8.1 (0.4 to 170.6)
28 days <10 10 270.2 (50.7 to 1,441) 4.4 (0.1 to 308.6)
  1. LOEC values are calculated by Dunnet’s multiple comparison test. ECx values are determined by non-linear regression analysis of the concentration-response curve.