  The dual magneto-hydrodynamics of dyonic plasma describes the study of
electrodynamics equations along with the transport equations in the presence of
electrons and magnetic monopoles. In this paper, we formulate the quaternionic
dual fields equations, namely, the hydro-electric and hydro-magnetic fields
equations which are an analogous to the generalized Lamb vector field and
vorticity field equations of dyonic cold plasma fluid. Further, we derive the
quaternionic Dirac-Maxwell equations for dual magneto-hydrodynamics of dyonic
cold plasma. We also obtain the quaternionic dual continuity equations that
describe the transport of dyonic fluid. Finally, we establish an analogy of
Alfven wave equation which may generate from the flow of magnetic monopoles in
the dyonic field of cold plasma. The present quaternionic formulation for
dyonic cold plasma is well invariant under the duality, Lorentz and CPT
transformations.
