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Statement to Kösler et al. 2019 and 2020 regarding the evaluation of the ecotoxicity of nitrification inhibitors using terrestrial and aquatic test organisms

Abstract

In this paper, the correct composition of Vizura is given and a note that the founded results concerning ecotoxicity of Vizura are of no relevance for the recommended application rates for Vizura.

Statement

  1. 1.

    In both papers of Kösler et al. [1, 2] the information on the product composition of Vizura is incorrect. Vizura does not contain 1,2,4-triazol [1] (corrected in [2]) nor 1H-pyrazole [2]. Vizura is a liquid formulation of 14% w/w 3,4-dimethylpyrazole phosphate in phosphoric acid and water.

  2. 2.

    Kösler et al. [1] are not using the recommended use rate of Vizura. The minimum test concentrations used in the different ecotoxicity tests in Kösler et al. [1] are higher than the DMPP concentration applied in agricultural practice with Vizura. Therefore, the results of Kösler et al. [1] concerning ecotoxicity of Vizura are of no relevance for the recommended application rates for Vizura used according to good agricultural practice.

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Abbreviations

DMPP:

3,4-Dimethylpyrazole phosphate

References

  1. 1.

    Kösler JE, Calvo OC, Franzaring J, Fangmeier A (2019) Evaluating the ecotoxicity of nitrification inhibitors using terrestrial and aquatic test organisms. Environ Sci Eur 31:91

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  2. 2.

    Kösler JE, Calvo OC, Franzaring J, Fangmeier A (2020) Correction to: Evaluating the ecotoxicity of nitrification inhibitors using terrestrial and aquatic test organisms. Environ Sci Eur 32:56

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GP initiated the text. Both authors made substantial and equal contributions to the initial draft. Both authors read and approved the final manuscript.

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Correspondence to Gregor Pasda.

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Pasda, G., Schmid, M. Statement to Kösler et al. 2019 and 2020 regarding the evaluation of the ecotoxicity of nitrification inhibitors using terrestrial and aquatic test organisms. Environ Sci Eur 32, 111 (2020). https://doi.org/10.1186/s12302-020-00389-4

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Keywords

  • Vizura
  • DMPP
  • Nitrification inhibitor
  • Ecotoxicity