JOHANNESBURG-SOUTH –African retailer and wholesaler Spar Group has closed its distribution centre in Zimbabwe due to weak economic growth and will now supply independent stores from South Africa, the firm’s chief executive said on Wednesday. “The economy was just too tough . . . payment issues, infrastructure issues, so it was better that we exited,” Spar Group Chief Executive Graham O’Connor told Reuters. Local spar franchises owned by independent retailer, Darren Lanca, will remain open, but will now get their supplies directly from South Africa.