A head on collision in Pettis County Saturday morning has left two people moderately injured.  Authorities say Jason Davis, 32, of Sedalia crossed the center line of Highway 50 and struck Jacqueline Lampkins, 61, of Sedalia.  Both Davis and Lampkins’ passenger Marietta Weber, 38, were transported to Bothwell Regional Hospital.  No one was wearing a seat belt.  Charges are pending in the investigation.