  Biskamp and Schwarz [Phys. Plasmas, 8, 3282 (2001)] have reported that the
energy spectrum of two-dimensional magnetohydrodynamic turbulence is
proportional to $k^{-3/2}$, which is a prediction of Iroshnikov-Kraichnan
phenomenology. In this comment we report some earlier results which
conclusively show that for two-dimensional magnetohydrodynamic turbulence,
Kolmogorov-like phenomenology (spectral index 5/3) is better model than
Iroshnikov-Kraichnan phenomenology; these results are based on energy flux
analysis.
